From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 .../istanbul-reports/lib/clover/index.js           | 163 ++++++++
 .../istanbul-reports/lib/cobertura/index.js        | 151 ++++++++
 .../istanbul-reports/lib/html-spa/.babelrc         |   3 +
 .../istanbul-reports/lib/html-spa/assets/bundle.js |  30 ++
 .../lib/html-spa/assets/sort-arrow-sprite.png      | Bin 0 -> 138 bytes
 .../istanbul-reports/lib/html-spa/assets/spa.css   | 298 +++++++++++++++
 .../istanbul-reports/lib/html-spa/index.js         | 176 +++++++++
 .../lib/html-spa/src/fileBreadcrumbs.js            |  31 ++
 .../lib/html-spa/src/filterToggle.js               |  50 +++
 .../lib/html-spa/src/flattenToggle.js              |  25 ++
 .../lib/html-spa/src/getChildData.js               | 155 ++++++++
 .../istanbul-reports/lib/html-spa/src/index.js     | 160 ++++++++
 .../istanbul-reports/lib/html-spa/src/routing.js   |  52 +++
 .../lib/html-spa/src/summaryHeader.js              |  63 +++
 .../lib/html-spa/src/summaryTableHeader.js         | 130 +++++++
 .../lib/html-spa/src/summaryTableLine.js           | 159 ++++++++
 .../lib/html-spa/webpack.config.js                 |  22 ++
 .../istanbul-reports/lib/html/annotator.js         | 305 +++++++++++++++
 .../istanbul-reports/lib/html/assets/base.css      | 224 +++++++++++
 .../lib/html/assets/block-navigation.js            |  86 +++++
 .../istanbul-reports/lib/html/assets/favicon.png   | Bin 0 -> 445 bytes
 .../lib/html/assets/sort-arrow-sprite.png          | Bin 0 -> 138 bytes
 .../istanbul-reports/lib/html/assets/sorter.js     | 209 ++++++++++
 .../lib/html/assets/vendor/prettify.css            |   1 +
 .../lib/html/assets/vendor/prettify.js             |   1 +
 .../istanbul-reports/lib/html/index.js             | 421 +++++++++++++++++++++
 .../istanbul-reports/lib/html/insertion-text.js    | 114 ++++++
 .../istanbul-reports/lib/json-summary/index.js     |  56 +++
 .../istanbul-reports/lib/json/index.js             |  44 +++
 .../istanbul-reports/lib/lcov/index.js             |  33 ++
 .../istanbul-reports/lib/lcovonly/index.js         |  77 ++++
 .../istanbul-reports/lib/none/index.js             |  10 +
 .../istanbul-reports/lib/teamcity/index.js         |  67 ++++
 .../istanbul-reports/lib/text-lcov/index.js        |  17 +
 .../istanbul-reports/lib/text-summary/index.js     |  62 +++
 .../istanbul-reports/lib/text/index.js             | 298 +++++++++++++++
 36 files changed, 3693 insertions(+)
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/clover/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/cobertura/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/.babelrc
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/assets/bundle.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/assets/sort-arrow-sprite.png
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/assets/spa.css
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/getChildData.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/routing.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html-spa/webpack.config.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/annotator.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/base.css
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/block-navigation.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/favicon.png
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/sort-arrow-sprite.png
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/sorter.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.css
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/html/insertion-text.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/json-summary/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/json/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/lcov/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/lcovonly/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/none/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/teamcity/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/text-lcov/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/text-summary/index.js
 create mode 100644 vanilla/node_modules/istanbul-reports/lib/text/index.js

(limited to 'vanilla/node_modules/istanbul-reports/lib')

diff --git a/vanilla/node_modules/istanbul-reports/lib/clover/index.js b/vanilla/node_modules/istanbul-reports/lib/clover/index.js
new file mode 100644
index 0000000..40d1606
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/clover/index.js
@@ -0,0 +1,163 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const { ReportBase } = require('istanbul-lib-report');
+
+class CloverReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        this.cw = null;
+        this.xml = null;
+        this.file = opts.file || 'clover.xml';
+    }
+
+    onStart(root, context) {
+        this.cw = context.writer.writeFile(this.file);
+        this.xml = context.getXMLWriter(this.cw);
+        this.writeRootStats(root, context);
+    }
+
+    onEnd() {
+        this.xml.closeAll();
+        this.cw.close();
+    }
+
+    getTreeStats(node, context) {
+        const state = {
+            packages: 0,
+            files: 0,
+            classes: 0
+        };
+        const visitor = {
+            onSummary(node, state) {
+                const metrics = node.getCoverageSummary(true);
+                if (metrics) {
+                    state.packages += 1;
+                }
+            },
+            onDetail(node, state) {
+                state.classes += 1;
+                state.files += 1;
+            }
+        };
+        node.visit(context.getVisitor(visitor), state);
+        return state;
+    }
+
+    writeRootStats(node, context) {
+        this.cw.println('<?xml version="1.0" encoding="UTF-8"?>');
+        this.xml.openTag('coverage', {
+            generated: Date.now().toString(),
+            clover: '3.2.0'
+        });
+
+        this.xml.openTag('project', {
+            timestamp: Date.now().toString(),
+            name: 'All files'
+        });
+
+        const metrics = node.getCoverageSummary();
+        this.xml.inlineTag('metrics', {
+            statements: metrics.lines.total,
+            coveredstatements: metrics.lines.covered,
+            conditionals: metrics.branches.total,
+            coveredconditionals: metrics.branches.covered,
+            methods: metrics.functions.total,
+            coveredmethods: metrics.functions.covered,
+            elements:
+                metrics.lines.total +
+                metrics.branches.total +
+                metrics.functions.total,
+            coveredelements:
+                metrics.lines.covered +
+                metrics.branches.covered +
+                metrics.functions.covered,
+            complexity: 0,
+            loc: metrics.lines.total,
+            ncloc: metrics.lines.total, // what? copied as-is from old report
+            ...this.getTreeStats(node, context)
+        });
+    }
+
+    writeMetrics(metrics) {
+        this.xml.inlineTag('metrics', {
+            statements: metrics.lines.total,
+            coveredstatements: metrics.lines.covered,
+            conditionals: metrics.branches.total,
+            coveredconditionals: metrics.branches.covered,
+            methods: metrics.functions.total,
+            coveredmethods: metrics.functions.covered
+        });
+    }
+
+    onSummary(node) {
+        if (node.isRoot()) {
+            return;
+        }
+        const metrics = node.getCoverageSummary(true);
+        if (!metrics) {
+            return;
+        }
+
+        this.xml.openTag('package', {
+            name: asJavaPackage(node)
+        });
+        this.writeMetrics(metrics);
+    }
+
+    onSummaryEnd(node) {
+        if (node.isRoot()) {
+            return;
+        }
+        this.xml.closeTag(this.xml.stack[this.xml.stack.length - 1]);
+    }
+
+    onDetail(node) {
+        const fileCoverage = node.getFileCoverage();
+        const metrics = node.getCoverageSummary();
+        const branchByLine = fileCoverage.getBranchCoverageByLine();
+
+        this.xml.openTag('file', {
+            name: asClassName(node),
+            path: fileCoverage.path
+        });
+
+        this.writeMetrics(metrics);
+
+        const lines = fileCoverage.getLineCoverage();
+        Object.entries(lines).forEach(([k, count]) => {
+            const attrs = {
+                num: k,
+                count,
+                type: 'stmt'
+            };
+            const branchDetail = branchByLine[k];
+
+            if (branchDetail) {
+                attrs.type = 'cond';
+                attrs.truecount = branchDetail.covered;
+                attrs.falsecount = branchDetail.total - branchDetail.covered;
+            }
+            this.xml.inlineTag('line', attrs);
+        });
+
+        this.xml.closeTag('file');
+    }
+}
+
+function asJavaPackage(node) {
+    return node
+        .getRelativeName()
+        .replace(/\//g, '.')
+        .replace(/\\/g, '.')
+        .replace(/\.$/, '');
+}
+
+function asClassName(node) {
+    return node.getRelativeName().replace(/.*[\\/]/, '');
+}
+
+module.exports = CloverReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/cobertura/index.js b/vanilla/node_modules/istanbul-reports/lib/cobertura/index.js
new file mode 100644
index 0000000..e5574fa
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/cobertura/index.js
@@ -0,0 +1,151 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const path = require('path');
+const { escape } = require('html-escaper');
+const { ReportBase } = require('istanbul-lib-report');
+
+class CoberturaReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        opts = opts || {};
+
+        this.cw = null;
+        this.xml = null;
+        this.timestamp = opts.timestamp || Date.now().toString();
+        this.projectRoot = opts.projectRoot || process.cwd();
+        this.file = opts.file || 'cobertura-coverage.xml';
+    }
+
+    onStart(root, context) {
+        this.cw = context.writer.writeFile(this.file);
+        this.xml = context.getXMLWriter(this.cw);
+        this.writeRootStats(root);
+    }
+
+    onEnd() {
+        this.xml.closeAll();
+        this.cw.close();
+    }
+
+    writeRootStats(node) {
+        const metrics = node.getCoverageSummary();
+        this.cw.println('<?xml version="1.0" ?>');
+        this.cw.println(
+            '<!DOCTYPE coverage SYSTEM "http://cobertura.sourceforge.net/xml/coverage-04.dtd">'
+        );
+        this.xml.openTag('coverage', {
+            'lines-valid': metrics.lines.total,
+            'lines-covered': metrics.lines.covered,
+            'line-rate': metrics.lines.pct / 100.0,
+            'branches-valid': metrics.branches.total,
+            'branches-covered': metrics.branches.covered,
+            'branch-rate': metrics.branches.pct / 100.0,
+            timestamp: this.timestamp,
+            complexity: '0',
+            version: '0.1'
+        });
+        this.xml.openTag('sources');
+        this.xml.inlineTag('source', null, this.projectRoot);
+        this.xml.closeTag('sources');
+        this.xml.openTag('packages');
+    }
+
+    onSummary(node) {
+        const metrics = node.getCoverageSummary(true);
+        if (!metrics) {
+            return;
+        }
+        this.xml.openTag('package', {
+            name: node.isRoot() ? 'main' : escape(asJavaPackage(node)),
+            'line-rate': metrics.lines.pct / 100.0,
+            'branch-rate': metrics.branches.pct / 100.0
+        });
+        this.xml.openTag('classes');
+    }
+
+    onSummaryEnd(node) {
+        const metrics = node.getCoverageSummary(true);
+        if (!metrics) {
+            return;
+        }
+        this.xml.closeTag('classes');
+        this.xml.closeTag('package');
+    }
+
+    onDetail(node) {
+        const fileCoverage = node.getFileCoverage();
+        const metrics = node.getCoverageSummary();
+        const branchByLine = fileCoverage.getBranchCoverageByLine();
+
+        this.xml.openTag('class', {
+            name: escape(asClassName(node)),
+            filename: path.relative(this.projectRoot, fileCoverage.path),
+            'line-rate': metrics.lines.pct / 100.0,
+            'branch-rate': metrics.branches.pct / 100.0
+        });
+
+        this.xml.openTag('methods');
+        const fnMap = fileCoverage.fnMap;
+        Object.entries(fnMap).forEach(([k, { name, decl }]) => {
+            const hits = fileCoverage.f[k];
+            this.xml.openTag('method', {
+                name: escape(name),
+                hits,
+                signature: '()V' //fake out a no-args void return
+            });
+            this.xml.openTag('lines');
+            //Add the function definition line and hits so that jenkins cobertura plugin records method hits
+            this.xml.inlineTag('line', {
+                number: decl.start.line,
+                hits
+            });
+            this.xml.closeTag('lines');
+            this.xml.closeTag('method');
+        });
+        this.xml.closeTag('methods');
+
+        this.xml.openTag('lines');
+        const lines = fileCoverage.getLineCoverage();
+        Object.entries(lines).forEach(([k, hits]) => {
+            const attrs = {
+                number: k,
+                hits,
+                branch: 'false'
+            };
+            const branchDetail = branchByLine[k];
+
+            if (branchDetail) {
+                attrs.branch = true;
+                attrs['condition-coverage'] =
+                    branchDetail.coverage +
+                    '% (' +
+                    branchDetail.covered +
+                    '/' +
+                    branchDetail.total +
+                    ')';
+            }
+            this.xml.inlineTag('line', attrs);
+        });
+
+        this.xml.closeTag('lines');
+        this.xml.closeTag('class');
+    }
+}
+
+function asJavaPackage(node) {
+    return node
+        .getRelativeName()
+        .replace(/\//g, '.')
+        .replace(/\\/g, '.')
+        .replace(/\.$/, '');
+}
+
+function asClassName(node) {
+    return node.getRelativeName().replace(/.*[\\/]/, '');
+}
+
+module.exports = CoberturaReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/.babelrc b/vanilla/node_modules/istanbul-reports/lib/html-spa/.babelrc
new file mode 100644
index 0000000..f995d68
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/.babelrc
@@ -0,0 +1,3 @@
+{
+    "presets": [["@babel/preset-env", { "modules": "commonjs" }], "@babel/preset-react"]
+}
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/assets/bundle.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/assets/bundle.js
new file mode 100644
index 0000000..341b64f
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/assets/bundle.js
@@ -0,0 +1,30 @@
+!function(e){var t={};function n(r){if(t[r])return t[r].exports;var l=t[r]={i:r,l:!1,exports:{}};return e[r].call(l.exports,l,l.exports,n),l.l=!0,l.exports}n.m=e,n.c=t,n.d=function(e,t,r){n.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:r})},n.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},n.t=function(e,t){if(1&t&&(e=n(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var l in e)n.d(r,l,function(t){return e[t]}.bind(null,l));return r},n.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=2)}([function(e,t,n){"use strict";e.exports=n(3)},function(e,t,n){"use strict";
+/*
+object-assign
+(c) Sindre Sorhus
+@license MIT
+*/var r=Object.getOwnPropertySymbols,l=Object.prototype.hasOwnProperty,i=Object.prototype.propertyIsEnumerable;function a(e){if(null==e)throw new TypeError("Object.assign cannot be called with null or undefined");return Object(e)}e.exports=function(){try{if(!Object.assign)return!1;var e=new String("abc");if(e[5]="de","5"===Object.getOwnPropertyNames(e)[0])return!1;for(var t={},n=0;n<10;n++)t["_"+String.fromCharCode(n)]=n;if("0123456789"!==Object.getOwnPropertyNames(t).map((function(e){return t[e]})).join(""))return!1;var r={};return"abcdefghijklmnopqrst".split("").forEach((function(e){r[e]=e})),"abcdefghijklmnopqrst"===Object.keys(Object.assign({},r)).join("")}catch(e){return!1}}()?Object.assign:function(e,t){for(var n,o,u=a(e),c=1;c<arguments.length;c++){for(var s in n=Object(arguments[c]))l.call(n,s)&&(u[s]=n[s]);if(r){o=r(n);for(var f=0;f<o.length;f++)i.call(n,o[f])&&(u[o[f]]=n[o[f]])}}return u}},function(e,t,n){"use strict";function r(){return(r=Object.assign?Object.assign.bind():function(e){for(var t=1;t<arguments.length;t++){var n=arguments[t];for(var r in n)({}).hasOwnProperty.call(n,r)&&(e[r]=n[r])}return e}).apply(null,arguments)}function l(e,t){return function(e){if(Array.isArray(e))return e}(e)||function(e,t){var n=null==e?null:"undefined"!=typeof Symbol&&e[Symbol.iterator]||e["@@iterator"];if(null!=n){var r,l,i,a,o=[],u=!0,c=!1;try{if(i=(n=n.call(e)).next,0===t){if(Object(n)!==n)return;u=!1}else for(;!(u=(r=i.call(n)).done)&&(o.push(r.value),o.length!==t);u=!0);}catch(e){c=!0,l=e}finally{try{if(!u&&null!=n.return&&(a=n.return(),Object(a)!==a))return}finally{if(c)throw l}}return o}}(e,t)||function(e,t){if(e){if("string"==typeof e)return i(e,t);var n={}.toString.call(e).slice(8,-1);return"Object"===n&&e.constructor&&(n=e.constructor.name),"Map"===n||"Set"===n?Array.from(e):"Arguments"===n||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)?i(e,t):void 0}}(e,t)||function(){throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}()}function i(e,t){(null==t||t>e.length)&&(t=e.length);for(var n=0,r=Array(t);n<t;n++)r[n]=e[n];return r}for(var a=n(0),o=n(4),u=n(8),c=n(9),s=n(10),f=n(11),d=n(12),p=n(13),m=n(14),h=n(15),v=h.setLocation,y=h.decodeLocation,g=a.useState,b=a.useMemo,w=a.useEffect,E=window.data,k={},x=0;x<window.metricsToShow.length;x++)k[window.metricsToShow[x]]=!0;var S=!0;function T(){var e=y(),t=l(g(e&&e.activeSort||{sortKey:"file",order:"desc"}),2),n=t[0],i=t[1],h=l(g(e&&e.isFlat||!1),2),x=h[0],T=h[1],C=l(g(e&&e.activeFilters||{low:!0,medium:!0,high:!0}),2),_=C[0],P=C[1],N=l(g(e&&e.expandedLines||[]),2),O=N[0],F=N[1],z=l(g(e&&e.fileFilter||""),2),I=z[0],M=z[1],R=b((function(){return f(E,k,n,x,_,I)}),[n,x,_,I]),L=E.metrics;return w((function(){v(S,n,x,_,I,O),S=!1}),[n,x,_,I,O]),w((function(){window.onpopstate=function(){var e=y();e&&o.unstable_batchedUpdates((function(){P(e.activeFilters),i(e.activeSort),T(e.isFlat),F(e.expandedLines),M(e.fileFilter)}))}}),[]),a.createElement("div",{className:"layout"},a.createElement("div",{className:"layout__section"},a.createElement(s,{metrics:L,metricsToShow:k})),a.createElement("div",{className:"layout__section"},a.createElement("div",{className:"toolbar"},a.createElement("div",{className:"toolbar__item"},a.createElement(d,{setIsFlat:T,isFlat:x})),a.createElement("div",{className:"toolbar__item"},a.createElement(p,{activeFilters:_,setFilters:P})))),a.createElement("div",{className:"layout__section"},a.createElement("h1",null,a.createElement(m,{fileFilter:I,setFileFilter:M}))),a.createElement("div",{className:"layout__section layout__section--fill"},a.createElement("table",{className:"coverage-summary"},a.createElement(u,{onSort:function(e){i(e)},activeSort:n,metricsToShow:k}),a.createElement("tbody",null,R.map((function(e){return a.createElement(c,r({},e,{key:e.file,metricsToShow:k,expandedLines:O,setExpandedLines:F,fileFilter:I,setFileFilter:M}))}))))),a.createElement("div",{className:"layout__section center small quiet"},"Code coverage generated by"," ",a.createElement("a",{href:"https://istanbul.js.org/",target:"_blank",rel:"noopener noreferrer"},"istanbul")," ","at ",window.generatedDatetime))}o.render(a.createElement(T,null),document.getElementById("app"))},function(e,t,n){"use strict";
+/** @license React v16.14.0
+ * react.production.min.js
+ *
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
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+ * scheduler.production.min.js
+ *
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
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index 0000000..25c0db2
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+/* Base */
+
+body,
+html {
+    margin: 0;
+    padding: 0;
+    height: 100%;
+}
+
+body {
+    color: #333;
+    background-color: #fcfcfc;
+    font: 14px/14px -apple-system, system-ui, BlinkMacSystemFont, 'Segoe UI',
+        Roboto, 'Helvetica Neue', Arial, sans-serif;
+}
+
+button {
+    margin: 0;
+    border: none;
+    font: inherit;
+    color: inherit;
+}
+
+button:focus {
+    outline: none;
+}
+
+*,
+*:after,
+*:before {
+    -webkit-box-sizing: border-box;
+    -moz-box-sizing: border-box;
+    box-sizing: border-box;
+}
+
+/* Typography */
+
+h1 {
+    font-size: 20px;
+    line-height: 20px;
+    margin: 0;
+}
+
+a {
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+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}
+
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+    font-size: 12px;
+}
+
+.strong {
+    font-weight: bold;
+}
+
+.center {
+    text-align: center;
+}
+
+.quiet {
+    opacity: 0.7;
+}
+
+/* Colors */
+
+.low {
+    background: #fce1e5;
+}
+
+.low--dark {
+    background: #c21f39;
+}
+
+.medium {
+    background: #fff4c2;
+}
+
+.medium--dark {
+    background: #f9cd0b;
+}
+
+.high {
+    background: rgb(230, 245, 208);
+}
+
+.high--dark {
+    background: rgb(77, 146, 33);
+}
+
+/* App */
+
+.app {
+    height: 100%;
+}
+
+/* Layout */
+
+.layout {
+    display: flex;
+    flex-direction: column;
+    min-height: 100%;
+    padding: 20px;
+}
+
+.layout__section {
+    flex-grow: 0;
+}
+
+.layout__section--fill {
+    flex-grow: 1;
+}
+
+.layout__section + .layout__section {
+    margin-top: 20px;
+}
+
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+        max-width: 100%;
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+    }
+}
+
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+
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+    flex-wrap: wrap;
+}
+
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+    margin-right: 40px;
+    margin-bottom: 10px;
+}
+
+/* Toggle */
+
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+    display: inline-flex;
+    align-items: center;
+}
+
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+}
+
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+    display: inline-block;
+    border: 1px solid #0074d9;
+    border-radius: 4px;
+    color: #0074d9;
+    overflow: hidden;
+    white-space: nowrap;
+}
+
+.toggle__option {
+    padding: 4px 8px;
+    background: #fcfcfc;
+}
+
+.toggle__option + .toggle__option {
+    border-left: 1px solid #0074d9;
+}
+
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+    color: #fff;
+    background: #0074d9;
+    border-left-color: #fcfcfc;
+}
+
+/* Expand */
+
+.expandbutton {
+    display: inline-block;
+    width: 1em;
+    margin-right: 0.25em;
+    padding: 0;
+    background-color: transparent;
+    font-weight: bold;
+}
+
+/* Fraction */
+
+.fraction {
+    font-size: 12px;
+    color: #666;
+    padding: 2px 4px;
+    border-radius: 4px;
+}
+
+/* Coverage */
+
+.coverage-summary {
+    border-collapse: collapse;
+}
+
+.coverage-summary tbody tr {
+    border-bottom: 1px solid #fff;
+}
+
+.coverage-summary td,
+.coverage-summary th {
+    padding: 5px;
+}
+
+.coverage-summary th {
+    text-align: left;
+    font-weight: normal;
+    white-space: nowrap;
+}
+
+.coverage-summary th.abs,
+.coverage-summary td.pct,
+.coverage-summary td.abs {
+    text-align: right;
+}
+
+.coverage-summary th.file {
+    min-width: 300px;
+    text-align: left;
+}
+
+.coverage-summary td.file {
+    white-space: nowrap;
+}
+
+.coverage-summary td.pct {
+    font-weight: 400;
+}
+
+.coverage-summary td.abs {
+    color: #666;
+    font-size: 12px;
+}
+
+.coverage-summary td.empty {
+    opacity: 0.5;
+}
+
+.coverage-summary .headercell {
+    border-top: 1px solid #eee;
+    text-align: right;
+    font-size: 12px;
+    color: #666;
+}
+
+.coverage-summary .headercell:nth-child(5n - 3),
+.coverage-summary td:nth-child(5n - 3) {
+    border-left: 2px solid #fcfcfc;
+    padding-left: 2em;
+}
+
+.filetab {
+    display: inline-block;
+    width: 1em;
+}
+
+/* Sorter */
+
+.sorter {
+    display: inline-block;
+    width: 7px;
+    height: 10px;
+    margin-left: 0.5em;
+    background: url(sort-arrow-sprite.png) no-repeat scroll 0 0 transparent;
+}
+
+.sorted .sorter {
+    background-position: 0 -20px;
+}
+
+.sorted-desc .sorter {
+    background-position: 0 -10px;
+}
+
+.sortable {
+    cursor: pointer;
+}
+
+/* Bar */
+
+.bar {
+    width: 50px;
+    height: 5px;
+    background: #fff;
+}
+
+.bar__data {
+    height: 100%;
+}
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/index.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/index.js
new file mode 100644
index 0000000..4ce9d7e
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/index.js
@@ -0,0 +1,176 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const fs = require('fs');
+const path = require('path');
+const { ReportBase } = require('istanbul-lib-report');
+const HtmlReport = require('../html');
+
+const standardLinkMapper = {
+    getPath(node) {
+        if (typeof node === 'string') {
+            return node;
+        }
+        let filePath = node.getQualifiedName();
+        if (node.isSummary()) {
+            if (filePath !== '') {
+                filePath += '/index.html';
+            } else {
+                filePath = 'index.html';
+            }
+        } else {
+            filePath += '.html';
+        }
+        return filePath;
+    },
+
+    relativePath(source, target) {
+        const targetPath = this.getPath(target);
+        const sourcePath = path.dirname(this.getPath(source));
+        return path.relative(sourcePath, targetPath);
+    },
+
+    assetPath(node, name) {
+        return this.relativePath(this.getPath(node), name);
+    }
+};
+
+class HtmlSpaReport extends ReportBase {
+    constructor(opts = {}) {
+        super({
+            // force the summarizer to nested for html-spa
+            summarizer: 'nested'
+        });
+
+        this.verbose = opts.verbose || false;
+        this.linkMapper = opts.linkMapper || standardLinkMapper;
+        this.subdir = opts.subdir || '';
+        this.date = Date();
+        this.skipEmpty = opts.skipEmpty;
+        this.htmlReport = new HtmlReport(opts);
+        this.htmlReport.getBreadcrumbHtml = function() {
+            return '<a href="javascript:history.back()">Back</a>';
+        };
+
+        this.metricsToShow = opts.metricsToShow || [
+            'lines',
+            'branches',
+            'functions'
+        ];
+    }
+
+    getWriter(context) {
+        if (!this.subdir) {
+            return context.writer;
+        }
+        return context.writer.writerForDir(this.subdir);
+    }
+
+    onStart(root, context) {
+        this.htmlReport.onStart(root, context);
+
+        const writer = this.getWriter(context);
+        const srcDir = path.resolve(__dirname, './assets');
+        fs.readdirSync(srcDir).forEach(f => {
+            const resolvedSource = path.resolve(srcDir, f);
+            const resolvedDestination = '.';
+            const stat = fs.statSync(resolvedSource);
+            let dest;
+
+            if (stat.isFile()) {
+                dest = resolvedDestination + '/' + f;
+                if (this.verbose) {
+                    console.log('Write asset: ' + dest);
+                }
+                writer.copyFile(resolvedSource, dest);
+            }
+        });
+    }
+
+    onDetail(node, context) {
+        this.htmlReport.onDetail(node, context);
+    }
+
+    getMetric(metric, type, context) {
+        const isEmpty = metric.total === 0;
+        return {
+            total: metric.total,
+            covered: metric.covered,
+            skipped: metric.skipped,
+            missed: metric.total - metric.covered,
+            pct: isEmpty ? 0 : metric.pct,
+            classForPercent: isEmpty
+                ? 'empty'
+                : context.classForPercent(type, metric.pct)
+        };
+    }
+
+    toDataStructure(node, context) {
+        const coverageSummary = node.getCoverageSummary();
+        const metrics = {
+            statements: this.getMetric(
+                coverageSummary.statements,
+                'statements',
+                context
+            ),
+            branches: this.getMetric(
+                coverageSummary.branches,
+                'branches',
+                context
+            ),
+            functions: this.getMetric(
+                coverageSummary.functions,
+                'functions',
+                context
+            ),
+            lines: this.getMetric(coverageSummary.lines, 'lines', context)
+        };
+
+        return {
+            file: node.getRelativeName(),
+            isEmpty: coverageSummary.isEmpty(),
+            metrics,
+            children:
+                node.isSummary() &&
+                node
+                    .getChildren()
+                    .map(child => this.toDataStructure(child, context))
+        };
+    }
+
+    onEnd(rootNode, context) {
+        const data = this.toDataStructure(rootNode, context);
+
+        const cw = this.getWriter(context).writeFile(
+            this.linkMapper.getPath(rootNode)
+        );
+
+        cw.write(
+            `<!doctype html>
+            <html lang="en">
+                <head>
+                    <link rel="stylesheet" href="spa.css" />
+                    <meta name="viewport" content="width=device-width, initial-scale=1">
+                </head>
+                <body>
+                    <div id="app" class="app"></div>
+                    <script>
+                        window.data = ${JSON.stringify(data)};
+                        window.generatedDatetime = ${JSON.stringify(
+                            String(Date())
+                        )};
+                        window.metricsToShow = ${JSON.stringify(
+                            this.metricsToShow
+                        )};
+                    </script>
+                    <script src="bundle.js"></script>
+                </body>
+            </html>`
+        );
+        cw.close();
+    }
+}
+
+module.exports = HtmlSpaReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js
new file mode 100644
index 0000000..b123d37
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/fileBreadcrumbs.js
@@ -0,0 +1,31 @@
+const React = require('react');
+
+module.exports = function FileBreadcrumbs({ fileFilter = '', setFileFilter }) {
+    const parts = fileFilter.split('/');
+    const breadcrumbs = [
+        {
+            path: '',
+            name: 'all files'
+        },
+        ...parts.map((part, i) => ({
+            path: parts.slice(0, i + 1).join('/'),
+            name: part
+        }))
+    ];
+
+    return breadcrumbs.map(({ path, name }) =>
+        path === fileFilter ? (
+            name
+        ) : (
+            <>
+                <a
+                    href="javascript:void(0)"
+                    onClick={() => setFileFilter(path)}
+                >
+                    {name}
+                </a>
+                /
+            </>
+        )
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js
new file mode 100644
index 0000000..b636b53
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/filterToggle.js
@@ -0,0 +1,50 @@
+const React = require('react');
+
+function ToggleOption({ children, filter, activeFilters, setFilters }) {
+    return (
+        <button
+            className={
+                'toggle__option ' + (activeFilters[filter] ? 'is-toggled' : '')
+            }
+            onClick={() =>
+                setFilters({
+                    ...activeFilters,
+                    [filter]: !activeFilters[filter]
+                })
+            }
+        >
+            {children}
+        </button>
+    );
+}
+
+module.exports = function FilterToggle({ activeFilters, setFilters }) {
+    return (
+        <div className="toggle">
+            <div className="toggle__label">Filter:</div>
+            <div className="toggle__options">
+                <ToggleOption
+                    filter="low"
+                    activeFilters={activeFilters}
+                    setFilters={setFilters}
+                >
+                    Low
+                </ToggleOption>
+                <ToggleOption
+                    filter="medium"
+                    activeFilters={activeFilters}
+                    setFilters={setFilters}
+                >
+                    Medium
+                </ToggleOption>
+                <ToggleOption
+                    filter="high"
+                    activeFilters={activeFilters}
+                    setFilters={setFilters}
+                >
+                    High
+                </ToggleOption>
+            </div>
+        </div>
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js
new file mode 100644
index 0000000..8bb6ea3
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/flattenToggle.js
@@ -0,0 +1,25 @@
+const React = require('react');
+
+module.exports = function FlattenButton({ setIsFlat, isFlat }) {
+    return (
+        <div className="toggle">
+            <div className="toggle__label">Files:</div>
+            <div className="toggle__options">
+                <button
+                    onClick={() => setIsFlat(!isFlat)}
+                    className={
+                        'toggle__option ' + (!isFlat ? 'is-toggled' : '')
+                    }
+                >
+                    Tree
+                </button>
+                <button
+                    onClick={() => setIsFlat(!isFlat)}
+                    className={'toggle__option ' + (isFlat ? 'is-toggled' : '')}
+                >
+                    Flat
+                </button>
+            </div>{' '}
+        </div>
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/getChildData.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/getChildData.js
new file mode 100644
index 0000000..eff5d31
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/getChildData.js
@@ -0,0 +1,155 @@
+function addPath(node, parentPath) {
+    if (!parentPath) {
+        return node;
+    }
+    return { ...node, file: parentPath + '/' + node.file };
+}
+
+function flatten(nodes, parentPath) {
+    let children = [];
+    for (let i = 0; i < nodes.length; i++) {
+        const child = nodes[i];
+        if (child.children) {
+            children = [
+                ...children,
+                ...flatten(
+                    child.children,
+                    (parentPath ? parentPath + '/' : '') + child.file
+                )
+            ];
+        } else {
+            children.push(addPath(child, parentPath));
+        }
+    }
+    return children;
+}
+
+function filterByFile(nodes, fileFilter, parentPath) {
+    let children = [];
+
+    for (let i = 0; i < nodes.length; i++) {
+        const child = nodes[i];
+        const childFullPath = (parentPath ? parentPath + '/' : '') + child.file;
+
+        const isChildUnderFilter =
+            fileFilter === childFullPath ||
+            fileFilter.indexOf(childFullPath + '/') === 0;
+        const isChildAboveFilter =
+            childFullPath.indexOf(fileFilter + '/') === 0;
+
+        if (isChildUnderFilter) {
+            // flatten and continue looking underneath
+            children = [
+                ...children,
+                ...filterByFile(child.children, fileFilter, childFullPath)
+            ];
+        } else if (isChildAboveFilter) {
+            // remove the parent path and add everything underneath
+            const charsToRemoveFromFile =
+                fileFilter.length - (parentPath ? parentPath.length : 0);
+            let childFilename = child.file.slice(charsToRemoveFromFile);
+            if (childFilename[0] === '/') {
+                childFilename = childFilename.slice(1);
+            }
+            children.push({
+                ...child,
+                file: childFilename
+            });
+        }
+    }
+    return children;
+}
+
+function sort(childData, activeSort) {
+    const top = activeSort.order === 'asc' ? 1 : -1;
+    const bottom = activeSort.order === 'asc' ? -1 : 1;
+    childData.sort((a, b) => {
+        let valueA;
+        let valueB;
+        if (activeSort.sortKey === 'file') {
+            valueA = a.file;
+            valueB = b.file;
+        } else {
+            const [metricType, valueType] = activeSort.sortKey.split('.');
+            valueA = a.metrics[metricType][valueType];
+            valueB = b.metrics[metricType][valueType];
+        }
+
+        if (valueA === valueB) {
+            return 0;
+        }
+        return valueA < valueB ? top : bottom;
+    });
+
+    for (let i = 0; i < childData.length; i++) {
+        const child = childData[i];
+        if (child.children) {
+            childData[i] = {
+                ...child,
+                children: sort(child.children, activeSort)
+            };
+        }
+    }
+    return childData;
+}
+
+function filter(nodes, metricsMap, activeFilters) {
+    const children = [];
+    for (let i = 0; i < nodes.length; i++) {
+        let child = nodes[i];
+        if (child.children) {
+            const newSubChildren = filter(
+                child.children,
+                metricsMap,
+                activeFilters
+            );
+            if (newSubChildren.length) {
+                child = { ...child, children: newSubChildren };
+                children.push(child);
+            }
+        } else {
+            if (
+                (metricsMap.statements &&
+                    activeFilters[child.metrics.statements.classForPercent]) ||
+                (metricsMap.branches &&
+                    activeFilters[child.metrics.branches.classForPercent]) ||
+                (metricsMap.functions &&
+                    activeFilters[child.metrics.functions.classForPercent]) ||
+                (metricsMap.lines &&
+                    activeFilters[child.metrics.lines.classForPercent])
+            ) {
+                children.push(child);
+            }
+        }
+    }
+    return children;
+}
+
+module.exports = function getChildData(
+    sourceData,
+    metricsToShow,
+    activeSort,
+    isFlat,
+    activeFilters,
+    fileFilter
+) {
+    let childData = sourceData.children;
+
+    if (isFlat) {
+        childData = flatten(childData.slice(0));
+    }
+
+    if (fileFilter) {
+        childData = filterByFile(childData, fileFilter);
+    }
+
+    if (activeFilters.low) {
+        activeFilters = { ...activeFilters, empty: true };
+    }
+    childData = filter(childData, metricsToShow, activeFilters);
+
+    if (activeSort) {
+        childData = sort(childData, activeSort);
+    }
+    return childData;
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/index.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/index.js
new file mode 100644
index 0000000..c89c416
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/index.js
@@ -0,0 +1,160 @@
+// The index file for the spa running on the summary page
+const React = require('react');
+const ReactDOM = require('react-dom');
+const SummaryTableHeader = require('./summaryTableHeader');
+const SummaryTableLine = require('./summaryTableLine');
+const SummaryHeader = require('./summaryHeader');
+const getChildData = require('./getChildData');
+const FlattenToggle = require('./flattenToggle');
+const FilterToggle = require('./filterToggle');
+const FileBreadcrumbs = require('./fileBreadcrumbs');
+const { setLocation, decodeLocation } = require('./routing');
+
+const { useState, useMemo, useEffect } = React;
+
+const sourceData = window.data;
+const metricsToShow = {};
+for (let i = 0; i < window.metricsToShow.length; i++) {
+    metricsToShow[window.metricsToShow[i]] = true;
+}
+
+let firstMount = true;
+
+function App() {
+    const routingDefaults = decodeLocation();
+
+    const [activeSort, setSort] = useState(
+        (routingDefaults && routingDefaults.activeSort) || {
+            sortKey: 'file',
+            order: 'desc'
+        }
+    );
+    const [isFlat, setIsFlat] = useState(
+        (routingDefaults && routingDefaults.isFlat) || false
+    );
+    const [activeFilters, setFilters] = useState(
+        (routingDefaults && routingDefaults.activeFilters) || {
+            low: true,
+            medium: true,
+            high: true
+        }
+    );
+    const [expandedLines, setExpandedLines] = useState(
+        (routingDefaults && routingDefaults.expandedLines) || []
+    );
+    const [fileFilter, setFileFilter] = useState(
+        (routingDefaults && routingDefaults.fileFilter) || ''
+    );
+    const childData = useMemo(
+        () =>
+            getChildData(
+                sourceData,
+                metricsToShow,
+                activeSort,
+                isFlat,
+                activeFilters,
+                fileFilter
+            ),
+        [activeSort, isFlat, activeFilters, fileFilter]
+    );
+    const overallMetrics = sourceData.metrics;
+
+    useEffect(() => {
+        setLocation(
+            firstMount,
+            activeSort,
+            isFlat,
+            activeFilters,
+            fileFilter,
+            expandedLines
+        );
+        firstMount = false;
+    }, [activeSort, isFlat, activeFilters, fileFilter, expandedLines]);
+
+    useEffect(() => {
+        window.onpopstate = () => {
+            const routingState = decodeLocation();
+            if (routingState) {
+                // make sure all the state is set before rendering to avoid url updates
+                // alternative is to merge all the states into one so it can be set in one go
+                // https://github.com/facebook/react/issues/14259
+                ReactDOM.unstable_batchedUpdates(() => {
+                    setFilters(routingState.activeFilters);
+                    setSort(routingState.activeSort);
+                    setIsFlat(routingState.isFlat);
+                    setExpandedLines(routingState.expandedLines);
+                    setFileFilter(routingState.fileFilter);
+                });
+            }
+        };
+    }, []);
+
+    return (
+        <div className="layout">
+            <div className="layout__section">
+                <SummaryHeader
+                    metrics={overallMetrics}
+                    metricsToShow={metricsToShow}
+                />
+            </div>
+            <div className="layout__section">
+                <div className="toolbar">
+                    <div className="toolbar__item">
+                        <FlattenToggle setIsFlat={setIsFlat} isFlat={isFlat} />
+                    </div>
+                    <div className="toolbar__item">
+                        <FilterToggle
+                            activeFilters={activeFilters}
+                            setFilters={setFilters}
+                        />
+                    </div>
+                </div>
+            </div>
+            <div className="layout__section">
+                <h1>
+                    <FileBreadcrumbs
+                        fileFilter={fileFilter}
+                        setFileFilter={setFileFilter}
+                    />
+                </h1>
+            </div>
+            <div className="layout__section layout__section--fill">
+                <table className="coverage-summary">
+                    <SummaryTableHeader
+                        onSort={newSort => {
+                            setSort(newSort);
+                        }}
+                        activeSort={activeSort}
+                        metricsToShow={metricsToShow}
+                    />
+                    <tbody>
+                        {childData.map(child => (
+                            <SummaryTableLine
+                                {...child}
+                                key={child.file}
+                                metricsToShow={metricsToShow}
+                                expandedLines={expandedLines}
+                                setExpandedLines={setExpandedLines}
+                                fileFilter={fileFilter}
+                                setFileFilter={setFileFilter}
+                            />
+                        ))}
+                    </tbody>
+                </table>
+            </div>
+            <div className="layout__section center small quiet">
+                Code coverage generated by{' '}
+                <a
+                    href="https://istanbul.js.org/"
+                    target="_blank"
+                    rel="noopener noreferrer"
+                >
+                    istanbul
+                </a>{' '}
+                at {window.generatedDatetime}
+            </div>
+        </div>
+    );
+}
+
+ReactDOM.render(<App />, document.getElementById('app'));
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/routing.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/routing.js
new file mode 100644
index 0000000..a4d0bc7
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/routing.js
@@ -0,0 +1,52 @@
+exports.setLocation = function setLocation(
+    isReplace,
+    activeSort,
+    isFlat,
+    activeFilters,
+    fileFilter,
+    expandedLines
+) {
+    const params = [
+        activeSort.sortKey,
+        activeSort.order,
+        isFlat,
+        activeFilters.low,
+        activeFilters.medium,
+        activeFilters.high,
+        encodeURIComponent(fileFilter),
+        expandedLines.map(encodeURIComponent).join(',')
+    ];
+    const newUrl = `#${params.join('/')}`;
+
+    if (newUrl === location.hash) {
+        return;
+    }
+
+    window.history[isReplace ? 'replaceState' : 'pushState'](null, '', newUrl);
+};
+
+exports.decodeLocation = function decodeLocation() {
+    const items = location.hash.substr(1).split('/');
+    if (items.length !== 8) {
+        return null;
+    }
+
+    try {
+        return {
+            activeSort: {
+                sortKey: items[0],
+                order: items[1]
+            },
+            isFlat: JSON.parse(items[2]),
+            activeFilters: {
+                low: JSON.parse(items[3]),
+                medium: JSON.parse(items[4]),
+                high: JSON.parse(items[5])
+            },
+            fileFilter: decodeURIComponent(items[6]),
+            expandedLines: items[7].split(',').map(decodeURIComponent)
+        };
+    } catch (e) {
+        return null;
+    }
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js
new file mode 100644
index 0000000..3bdd8ff
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryHeader.js
@@ -0,0 +1,63 @@
+const React = require('react');
+
+function Ignores({ metrics, metricsToShow }) {
+    const metricKeys = Object.keys(metricsToShow);
+    const result = [];
+
+    for (let i = 0; i < metricKeys.length; i++) {
+        const metricKey = metricKeys[i];
+        if (metricsToShow[metricKey]) {
+            const skipped = metrics[metricKey].skipped;
+            if (skipped > 0) {
+                result.push(
+                    `${skipped} ${metricKey}${
+                        skipped === 1 ? '' : metricKey === 'branch' ? 'es' : 's'
+                    }`
+                );
+            }
+        }
+    }
+
+    if (result.length === 0) {
+        return false;
+    }
+
+    return (
+        <div className="toolbar__item">
+            <span className="strong">{result.join(', ')}</span>
+            <span className="quiet">Ignored</span>
+        </div>
+    );
+}
+
+function StatusMetric({ data, name }) {
+    return (
+        <div className="toolbar__item">
+            <span className="strong">{data.pct}%</span>{' '}
+            <span className="quiet">{name}</span>{' '}
+            <span className={'fraction ' + data.classForPercent}>
+                {data.covered}/{data.total}
+            </span>
+        </div>
+    );
+}
+
+module.exports = function SummaryHeader({ metrics, metricsToShow }) {
+    return (
+        <div className="toolbar">
+            {metricsToShow.statements && (
+                <StatusMetric data={metrics.statements} name="Statements" />
+            )}
+            {metricsToShow.branches && (
+                <StatusMetric data={metrics.branches} name="Branches" />
+            )}
+            {metricsToShow.functions && (
+                <StatusMetric data={metrics.functions} name="Functions" />
+            )}
+            {metricsToShow.lines && (
+                <StatusMetric data={metrics.lines} name="Lines" />
+            )}
+            <Ignores metrics={metrics} metricsToShow={metricsToShow} />
+        </div>
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js
new file mode 100644
index 0000000..aae91d1
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableHeader.js
@@ -0,0 +1,130 @@
+const React = require('react');
+
+function getSortDetails(sortKey, activeSort) {
+    let newSort = { sortKey, order: 'desc' };
+    let sortClass = '';
+    if (activeSort && activeSort.sortKey === sortKey) {
+        sortClass = 'sorted';
+        if (activeSort.order === 'desc') {
+            sortClass += '-desc';
+            newSort.order = 'asc';
+        } else {
+            if (sortKey !== 'file') {
+                newSort = { sortKey: 'file', order: 'desc' };
+            }
+        }
+    }
+
+    return {
+        newSort,
+        sortClass
+    };
+}
+
+function SummaryTableHeaderCell({ name, onSort, sortKey, activeSort }) {
+    const { newSort, sortClass } = getSortDetails(sortKey, activeSort);
+    return (
+        <th
+            className={'sortable headercell ' + sortClass}
+            onClick={() => onSort(newSort)}
+        >
+            {name}
+            <span className="sorter" />
+        </th>
+    );
+}
+
+function FileHeaderCell({ onSort, activeSort }) {
+    const { newSort, sortClass } = getSortDetails('file', activeSort);
+
+    return (
+        <th
+            className={'sortable file ' + sortClass}
+            onClick={() => onSort(newSort)}
+        >
+            File
+            <span className="sorter" />
+        </th>
+    );
+}
+
+function SubHeadings({ sortKeyPrefix, onSort, activeSort }) {
+    return (
+        <>
+            <SummaryTableHeaderCell
+                name="%"
+                onSort={onSort}
+                sortKey={sortKeyPrefix + '.pct'}
+                activeSort={activeSort}
+            />
+            <th className="headercell"></th>
+            <SummaryTableHeaderCell
+                name="Covered"
+                onSort={onSort}
+                sortKey={sortKeyPrefix + '.covered'}
+                activeSort={activeSort}
+            />
+            <SummaryTableHeaderCell
+                name="Missed"
+                onSort={onSort}
+                sortKey={sortKeyPrefix + '.missed'}
+                activeSort={activeSort}
+            />
+            <SummaryTableHeaderCell
+                name="Total"
+                onSort={onSort}
+                sortKey={sortKeyPrefix + '.total'}
+                activeSort={activeSort}
+            />
+        </>
+    );
+}
+
+module.exports = function SummaryTableHeader({
+    onSort,
+    activeSort,
+    metricsToShow
+}) {
+    return (
+        <thead>
+            <tr className="topheading">
+                <th></th>
+                {metricsToShow.statements && <th colSpan={5}>Statements</th>}
+                {metricsToShow.branches && <th colSpan={5}>Branches</th>}
+                {metricsToShow.functions && <th colSpan={5}>Functions</th>}
+                {metricsToShow.lines && <th colSpan={5}>Lines</th>}
+            </tr>
+            <tr className="subheading">
+                <FileHeaderCell onSort={onSort} activeSort={activeSort} />
+                {metricsToShow.statements && (
+                    <SubHeadings
+                        sortKeyPrefix="statements"
+                        onSort={onSort}
+                        activeSort={activeSort}
+                    />
+                )}
+                {metricsToShow.branches && (
+                    <SubHeadings
+                        sortKeyPrefix="branches"
+                        onSort={onSort}
+                        activeSort={activeSort}
+                    />
+                )}
+                {metricsToShow.functions && (
+                    <SubHeadings
+                        sortKeyPrefix="functions"
+                        onSort={onSort}
+                        activeSort={activeSort}
+                    />
+                )}
+                {metricsToShow.lines && (
+                    <SubHeadings
+                        sortKeyPrefix="lines"
+                        onSort={onSort}
+                        activeSort={activeSort}
+                    />
+                )}
+            </tr>
+        </thead>
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js
new file mode 100644
index 0000000..6dc56e6
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/src/summaryTableLine.js
@@ -0,0 +1,159 @@
+const React = require('react');
+
+function MetricCells({ metrics }) {
+    const { classForPercent, pct, covered, missed, total } = metrics;
+
+    return (
+        <>
+            <td className={'pct ' + classForPercent}>{Math.round(pct)}% </td>
+            <td className={classForPercent}>
+                <div className="bar">
+                    <div
+                        className={`bar__data ${classForPercent} ${classForPercent}--dark`}
+                        style={{ width: pct + '%' }}
+                    ></div>
+                </div>
+            </td>
+            <td className={'abs ' + classForPercent}>{covered}</td>
+            <td className={'abs ' + classForPercent}>{missed}</td>
+            <td className={'abs ' + classForPercent}>{total}</td>
+        </>
+    );
+}
+
+function FileCell({
+    file,
+    prefix,
+    expandedLines,
+    setExpandedLines,
+    hasChildren,
+    setFileFilter
+}) {
+    if (hasChildren) {
+        const expandedIndex = expandedLines.indexOf(prefix + file);
+        const isExpanded = expandedIndex >= 0;
+        const newExpandedLines = isExpanded
+            ? [
+                  ...expandedLines.slice(0, expandedIndex),
+                  ...expandedLines.slice(expandedIndex + 1)
+              ]
+            : [...expandedLines, prefix + file];
+
+        return (
+            <>
+                <button
+                    type="button"
+                    onClick={() => setExpandedLines(newExpandedLines)}
+                    className="expandbutton"
+                >
+                    {isExpanded ? String.fromCharCode(0x2013) : '+'}
+                </button>
+                <a
+                    href="javascript:void(0)"
+                    onClick={() => setFileFilter(prefix + file)}
+                >
+                    {file}
+                </a>
+            </>
+        );
+    } else {
+        return <a href={`./${prefix}${file}.html`}>{file}</a>;
+    }
+}
+
+function getWorstMetricClassForPercent(metricsToShow, metrics) {
+    let classForPercent = 'none';
+    for (const metricToShow in metricsToShow) {
+        if (metricsToShow[metricToShow]) {
+            const metricClassForPercent = metrics[metricToShow].classForPercent;
+
+            // ignore none metrics so they don't change whats shown
+            if (metricClassForPercent === 'none') {
+                continue;
+            }
+
+            // if the metric low or lower than whats currently being used, replace it
+            if (
+                metricClassForPercent == 'low' ||
+                (metricClassForPercent === 'medium' &&
+                    classForPercent !== 'low') ||
+                (metricClassForPercent === 'high' &&
+                    classForPercent !== 'low' &&
+                    classForPercent !== 'medium')
+            ) {
+                classForPercent = metricClassForPercent;
+            }
+        }
+    }
+    return classForPercent;
+}
+
+module.exports = function SummaryTableLine({
+    prefix,
+    metrics,
+    file,
+    children,
+    tabSize,
+    metricsToShow,
+    expandedLines,
+    setExpandedLines,
+    fileFilter,
+    setFileFilter
+}) {
+    tabSize = tabSize || 0;
+    if (children && tabSize > 0) {
+        tabSize--;
+    }
+    prefix = (fileFilter ? fileFilter + '/' : '') + (prefix || '');
+
+    return (
+        <>
+            <tr>
+                <td
+                    className={
+                        'file ' +
+                        getWorstMetricClassForPercent(metricsToShow, metrics)
+                    }
+                >
+                    {/* eslint-disable-line prefer-spread */ Array.apply(null, {
+                        length: tabSize
+                    }).map((nothing, index) => (
+                        <span className="filetab" key={index} />
+                    ))}
+                    <FileCell
+                        file={file}
+                        prefix={prefix}
+                        expandedLines={expandedLines}
+                        setExpandedLines={setExpandedLines}
+                        hasChildren={Boolean(children)}
+                        setFileFilter={setFileFilter}
+                    />
+                </td>
+                {metricsToShow.statements && (
+                    <MetricCells metrics={metrics.statements} />
+                )}
+                {metricsToShow.branches && (
+                    <MetricCells metrics={metrics.branches} />
+                )}
+                {metricsToShow.functions && (
+                    <MetricCells metrics={metrics.functions} />
+                )}
+                {metricsToShow.lines && <MetricCells metrics={metrics.lines} />}
+            </tr>
+            {children &&
+                expandedLines.indexOf(prefix + file) >= 0 &&
+                children.map(child => (
+                    <SummaryTableLine
+                        {...child}
+                        tabSize={tabSize + 2}
+                        key={child.file}
+                        prefix={prefix + file + '/'}
+                        metricsToShow={metricsToShow}
+                        expandedLines={expandedLines}
+                        setExpandedLines={setExpandedLines}
+                        setFileFilter={setFileFilter}
+                    />
+                ))}
+        </>
+    );
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html-spa/webpack.config.js b/vanilla/node_modules/istanbul-reports/lib/html-spa/webpack.config.js
new file mode 100644
index 0000000..02a2d6c
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html-spa/webpack.config.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const path = require('path');
+
+module.exports = {
+    entry: path.resolve(__dirname, 'src/index.js'),
+    output: {
+        path: path.resolve(__dirname, 'assets'),
+        filename: 'bundle.js'
+    },
+    module: {
+        rules: [
+            {
+                test: /\.js$/,
+                exclude: /node_modules/,
+                use: {
+                    loader: 'babel-loader'
+                }
+            }
+        ]
+    }
+};
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/annotator.js b/vanilla/node_modules/istanbul-reports/lib/html/annotator.js
new file mode 100644
index 0000000..982d047
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/annotator.js
@@ -0,0 +1,305 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+
+const InsertionText = require('./insertion-text');
+const lt = '\u0001';
+const gt = '\u0002';
+const RE_LT = /</g;
+const RE_GT = />/g;
+const RE_AMP = /&/g;
+// eslint-disable-next-line
+var RE_lt = /\u0001/g;
+// eslint-disable-next-line
+var RE_gt = /\u0002/g;
+
+function title(str) {
+    return ' title="' + str + '" ';
+}
+
+function customEscape(text) {
+    text = String(text);
+    return text
+        .replace(RE_AMP, '&amp;')
+        .replace(RE_LT, '&lt;')
+        .replace(RE_GT, '&gt;')
+        .replace(RE_lt, '<')
+        .replace(RE_gt, '>');
+}
+
+function annotateLines(fileCoverage, structuredText) {
+    const lineStats = fileCoverage.getLineCoverage();
+    if (!lineStats) {
+        return;
+    }
+    Object.entries(lineStats).forEach(([lineNumber, count]) => {
+        if (structuredText[lineNumber]) {
+            structuredText[lineNumber].covered = count > 0 ? 'yes' : 'no';
+            structuredText[lineNumber].hits = count;
+        }
+    });
+}
+
+function annotateStatements(fileCoverage, structuredText) {
+    const statementStats = fileCoverage.s;
+    const statementMeta = fileCoverage.statementMap;
+    Object.entries(statementStats).forEach(([stName, count]) => {
+        const meta = statementMeta[stName];
+        const type = count > 0 ? 'yes' : 'no';
+        const startCol = meta.start.column;
+        let endCol = meta.end.column + 1;
+        const startLine = meta.start.line;
+        const endLine = meta.end.line;
+        const openSpan =
+            lt +
+            'span class="' +
+            (meta.skip ? 'cstat-skip' : 'cstat-no') +
+            '"' +
+            title('statement not covered') +
+            gt;
+        const closeSpan = lt + '/span' + gt;
+        let text;
+
+        if (type === 'no' && structuredText[startLine]) {
+            if (endLine !== startLine) {
+                endCol = structuredText[startLine].text.originalLength();
+            }
+            text = structuredText[startLine].text;
+            text.wrap(
+                startCol,
+                openSpan,
+                startCol < endCol ? endCol : text.originalLength(),
+                closeSpan
+            );
+        }
+    });
+}
+
+function annotateFunctions(fileCoverage, structuredText) {
+    const fnStats = fileCoverage.f;
+    const fnMeta = fileCoverage.fnMap;
+    if (!fnStats) {
+        return;
+    }
+    Object.entries(fnStats).forEach(([fName, count]) => {
+        const meta = fnMeta[fName];
+        const type = count > 0 ? 'yes' : 'no';
+        // Some versions of the instrumenter in the wild populate 'func'
+        // but not 'decl':
+        const decl = meta.decl || meta.loc;
+        const startCol = decl.start.column;
+        let endCol = decl.end.column + 1;
+        const startLine = decl.start.line;
+        const endLine = decl.end.line;
+        const openSpan =
+            lt +
+            'span class="' +
+            (meta.skip ? 'fstat-skip' : 'fstat-no') +
+            '"' +
+            title('function not covered') +
+            gt;
+        const closeSpan = lt + '/span' + gt;
+        let text;
+
+        if (type === 'no' && structuredText[startLine]) {
+            if (endLine !== startLine) {
+                endCol = structuredText[startLine].text.originalLength();
+            }
+            text = structuredText[startLine].text;
+            text.wrap(
+                startCol,
+                openSpan,
+                startCol < endCol ? endCol : text.originalLength(),
+                closeSpan
+            );
+        }
+    });
+}
+
+function annotateBranches(fileCoverage, structuredText) {
+    const branchStats = fileCoverage.b;
+    const branchMeta = fileCoverage.branchMap;
+    if (!branchStats) {
+        return;
+    }
+
+    Object.entries(branchStats).forEach(([branchName, branchArray]) => {
+        const sumCount = branchArray.reduce((p, n) => p + n, 0);
+        const metaArray = branchMeta[branchName].locations;
+        let i;
+        let count;
+        let meta;
+        let startCol;
+        let endCol;
+        let startLine;
+        let endLine;
+        let openSpan;
+        let closeSpan;
+        let text;
+
+        // only highlight if partial branches are missing or if there is a
+        // single uncovered branch.
+        if (sumCount > 0 || (sumCount === 0 && branchArray.length === 1)) {
+            // Need to recover the metaArray placeholder item to count an implicit else
+            if (
+                // Check if the branch is a conditional if branch.
+                branchMeta[branchName].type === 'if' &&
+                // Check if the branch has an implicit else.
+                branchArray.length === 2 &&
+                // Check if the implicit else branch is unaccounted for.
+                metaArray.length === 1 &&
+                // Check if the implicit else branch is uncovered.
+                branchArray[1] === 0
+            ) {
+                metaArray[1] = {
+                    start: {},
+                    end: {}
+                };
+            }
+
+            for (
+                i = 0;
+                i < branchArray.length && i < metaArray.length;
+                i += 1
+            ) {
+                count = branchArray[i];
+                meta = metaArray[i];
+                startCol = meta.start.column;
+                endCol = meta.end.column + 1;
+                startLine = meta.start.line;
+                endLine = meta.end.line;
+                openSpan =
+                    lt +
+                    'span class="branch-' +
+                    i +
+                    ' ' +
+                    (meta.skip ? 'cbranch-skip' : 'cbranch-no') +
+                    '"' +
+                    title('branch not covered') +
+                    gt;
+                closeSpan = lt + '/span' + gt;
+
+                // If the branch is an implicit else from an if statement,
+                // then the coverage report won't show a statistic.
+                // Therefore, the previous branch will be used to report that
+                // there is no coverage on that implicit branch.
+                if (
+                    count === 0 &&
+                    startLine === undefined &&
+                    branchMeta[branchName].type === 'if'
+                ) {
+                    const prevMeta = metaArray[i - 1];
+                    startCol = prevMeta.start.column;
+                    endCol = prevMeta.end.column + 1;
+                    startLine = prevMeta.start.line;
+                    endLine = prevMeta.end.line;
+                }
+
+                if (count === 0 && structuredText[startLine]) {
+                    //skip branches taken
+                    if (endLine !== startLine) {
+                        endCol = structuredText[
+                            startLine
+                        ].text.originalLength();
+                    }
+                    text = structuredText[startLine].text;
+                    if (branchMeta[branchName].type === 'if') {
+                        // 'if' is a special case
+                        // since the else branch might not be visible, being nonexistent
+                        text.insertAt(
+                            startCol,
+                            lt +
+                                'span class="' +
+                                (meta.skip
+                                    ? 'skip-if-branch'
+                                    : 'missing-if-branch') +
+                                '"' +
+                                title(
+                                    (i === 0 ? 'if' : 'else') +
+                                        ' path not taken'
+                                ) +
+                                gt +
+                                (i === 0 ? 'I' : 'E') +
+                                lt +
+                                '/span' +
+                                gt,
+                            true,
+                            false
+                        );
+                    } else {
+                        text.wrap(
+                            startCol,
+                            openSpan,
+                            startCol < endCol ? endCol : text.originalLength(),
+                            closeSpan
+                        );
+                    }
+                }
+            }
+        }
+    });
+}
+
+function annotateSourceCode(fileCoverage, sourceStore) {
+    let codeArray;
+    let lineCoverageArray;
+    try {
+        const sourceText = sourceStore.getSource(fileCoverage.path);
+        const code = sourceText.split(/(?:\r?\n)|\r/);
+        let count = 0;
+        const structured = code.map(str => {
+            count += 1;
+            return {
+                line: count,
+                covered: 'neutral',
+                hits: 0,
+                text: new InsertionText(str, true)
+            };
+        });
+        structured.unshift({
+            line: 0,
+            covered: null,
+            text: new InsertionText('')
+        });
+        annotateLines(fileCoverage, structured);
+        //note: order is important, since statements typically result in spanning the whole line and doing branches late
+        //causes mismatched tags
+        annotateBranches(fileCoverage, structured);
+        annotateFunctions(fileCoverage, structured);
+        annotateStatements(fileCoverage, structured);
+        structured.shift();
+
+        codeArray = structured.map(
+            item => customEscape(item.text.toString()) || '&nbsp;'
+        );
+
+        lineCoverageArray = structured.map(item => ({
+            covered: item.covered,
+            hits: item.hits > 0 ? item.hits + 'x' : '&nbsp;'
+        }));
+
+        return {
+            annotatedCode: codeArray,
+            lineCoverage: lineCoverageArray,
+            maxLines: structured.length
+        };
+    } catch (ex) {
+        codeArray = [ex.message];
+        lineCoverageArray = [{ covered: 'no', hits: 0 }];
+        String(ex.stack || '')
+            .split(/\r?\n/)
+            .forEach(line => {
+                codeArray.push(line);
+                lineCoverageArray.push({ covered: 'no', hits: 0 });
+            });
+        return {
+            annotatedCode: codeArray,
+            lineCoverage: lineCoverageArray,
+            maxLines: codeArray.length
+        };
+    }
+}
+
+module.exports = annotateSourceCode;
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/base.css b/vanilla/node_modules/istanbul-reports/lib/html/assets/base.css
new file mode 100644
index 0000000..f418035
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/assets/base.css
@@ -0,0 +1,224 @@
+body, html {
+  margin:0; padding: 0;
+  height: 100%;
+}
+body {
+    font-family: Helvetica Neue, Helvetica, Arial;
+    font-size: 14px;
+    color:#333;
+}
+.small { font-size: 12px; }
+*, *:after, *:before {
+  -webkit-box-sizing:border-box;
+     -moz-box-sizing:border-box;
+          box-sizing:border-box;
+  }
+h1 { font-size: 20px; margin: 0;}
+h2 { font-size: 14px; }
+pre {
+    font: 12px/1.4 Consolas, "Liberation Mono", Menlo, Courier, monospace;
+    margin: 0;
+    padding: 0;
+    -moz-tab-size: 2;
+    -o-tab-size:  2;
+    tab-size: 2;
+}
+a { color:#0074D9; text-decoration:none; }
+a:hover { text-decoration:underline; }
+.strong { font-weight: bold; }
+.space-top1 { padding: 10px 0 0 0; }
+.pad2y { padding: 20px 0; }
+.pad1y { padding: 10px 0; }
+.pad2x { padding: 0 20px; }
+.pad2 { padding: 20px; }
+.pad1 { padding: 10px; }
+.space-left2 { padding-left:55px; }
+.space-right2 { padding-right:20px; }
+.center { text-align:center; }
+.clearfix { display:block; }
+.clearfix:after {
+  content:'';
+  display:block;
+  height:0;
+  clear:both;
+  visibility:hidden;
+  }
+.fl { float: left; }
+@media only screen and (max-width:640px) {
+  .col3 { width:100%; max-width:100%; }
+  .hide-mobile { display:none!important; }
+}
+
+.quiet {
+  color: #7f7f7f;
+  color: rgba(0,0,0,0.5);
+}
+.quiet a { opacity: 0.7; }
+
+.fraction {
+  font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace;
+  font-size: 10px;
+  color: #555;
+  background: #E8E8E8;
+  padding: 4px 5px;
+  border-radius: 3px;
+  vertical-align: middle;
+}
+
+div.path a:link, div.path a:visited { color: #333; }
+table.coverage {
+  border-collapse: collapse;
+  margin: 10px 0 0 0;
+  padding: 0;
+}
+
+table.coverage td {
+  margin: 0;
+  padding: 0;
+  vertical-align: top;
+}
+table.coverage td.line-count {
+    text-align: right;
+    padding: 0 5px 0 20px;
+}
+table.coverage td.line-coverage {
+    text-align: right;
+    padding-right: 10px;
+    min-width:20px;
+}
+
+table.coverage td span.cline-any {
+    display: inline-block;
+    padding: 0 5px;
+    width: 100%;
+}
+.missing-if-branch {
+    display: inline-block;
+    margin-right: 5px;
+    border-radius: 3px;
+    position: relative;
+    padding: 0 4px;
+    background: #333;
+    color: yellow;
+}
+
+.skip-if-branch {
+    display: none;
+    margin-right: 10px;
+    position: relative;
+    padding: 0 4px;
+    background: #ccc;
+    color: white;
+}
+.missing-if-branch .typ, .skip-if-branch .typ {
+    color: inherit !important;
+}
+.coverage-summary {
+  border-collapse: collapse;
+  width: 100%;
+}
+.coverage-summary tr { border-bottom: 1px solid #bbb; }
+.keyline-all { border: 1px solid #ddd; }
+.coverage-summary td, .coverage-summary th { padding: 10px; }
+.coverage-summary tbody { border: 1px solid #bbb; }
+.coverage-summary td { border-right: 1px solid #bbb; }
+.coverage-summary td:last-child { border-right: none; }
+.coverage-summary th {
+  text-align: left;
+  font-weight: normal;
+  white-space: nowrap;
+}
+.coverage-summary th.file { border-right: none !important; }
+.coverage-summary th.pct { }
+.coverage-summary th.pic,
+.coverage-summary th.abs,
+.coverage-summary td.pct,
+.coverage-summary td.abs { text-align: right; }
+.coverage-summary td.file { white-space: nowrap;  }
+.coverage-summary td.pic { min-width: 120px !important;  }
+.coverage-summary tfoot td { }
+
+.coverage-summary .sorter {
+    height: 10px;
+    width: 7px;
+    display: inline-block;
+    margin-left: 0.5em;
+    background: url(sort-arrow-sprite.png) no-repeat scroll 0 0 transparent;
+}
+.coverage-summary .sorted .sorter {
+    background-position: 0 -20px;
+}
+.coverage-summary .sorted-desc .sorter {
+    background-position: 0 -10px;
+}
+.status-line {  height: 10px; }
+/* yellow */
+.cbranch-no { background: yellow !important; color: #111; }
+/* dark red */
+.red.solid, .status-line.low, .low .cover-fill { background:#C21F39 }
+.low .chart { border:1px solid #C21F39 }
+.highlighted,
+.highlighted .cstat-no, .highlighted .fstat-no, .highlighted .cbranch-no{
+  background: #C21F39 !important;
+}
+/* medium red */
+.cstat-no, .fstat-no, .cbranch-no, .cbranch-no { background:#F6C6CE }
+/* light red */
+.low, .cline-no { background:#FCE1E5 }
+/* light green */
+.high, .cline-yes { background:rgb(230,245,208) }
+/* medium green */
+.cstat-yes { background:rgb(161,215,106) }
+/* dark green */
+.status-line.high, .high .cover-fill { background:rgb(77,146,33) }
+.high .chart { border:1px solid rgb(77,146,33) }
+/* dark yellow (gold) */
+.status-line.medium, .medium .cover-fill { background: #f9cd0b; }
+.medium .chart { border:1px solid #f9cd0b; }
+/* light yellow */
+.medium { background: #fff4c2; }
+
+.cstat-skip { background: #ddd; color: #111; }
+.fstat-skip { background: #ddd; color: #111 !important; }
+.cbranch-skip { background: #ddd !important; color: #111; }
+
+span.cline-neutral { background: #eaeaea; }
+
+.coverage-summary td.empty {
+    opacity: .5;
+    padding-top: 4px;
+    padding-bottom: 4px;
+    line-height: 1;
+    color: #888;
+}
+
+.cover-fill, .cover-empty {
+  display:inline-block;
+  height: 12px;
+}
+.chart {
+  line-height: 0;
+}
+.cover-empty {
+    background: white;
+}
+.cover-full {
+    border-right: none !important;
+}
+pre.prettyprint {
+    border: none !important;
+    padding: 0 !important;
+    margin: 0 !important;
+}
+.com { color: #999 !important; }
+.ignore-none { color: #999; font-weight: normal; }
+
+.wrapper {
+  min-height: 100%;
+  height: auto !important;
+  height: 100%;
+  margin: 0 auto -48px;
+}
+.footer, .push {
+  height: 48px;
+}
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/block-navigation.js b/vanilla/node_modules/istanbul-reports/lib/html/assets/block-navigation.js
new file mode 100644
index 0000000..eb52784
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/assets/block-navigation.js
@@ -0,0 +1,86 @@
+var jumpToCode = (function init() {
+    // Classes of code we would like to highlight in the file view
+    var missingCoverageClasses = ['.cbranch-no', '.cstat-no', '.fstat-no'];
+
+    // Elements to highlight in the file listing view
+    var fileListingElements = ['td.pct.low'];
+
+    // We don't want to select elements that are direct descendants of another match
+    var notSelector = ':not(' + missingCoverageClasses.join('):not(') + ') > '; // becomes `:not(a):not(b) > `
+
+    // Selector that finds elements on the page to which we can jump
+    var selector =
+        fileListingElements.join(', ') +
+        ', ' +
+        notSelector +
+        missingCoverageClasses.join(', ' + notSelector); // becomes `:not(a):not(b) > a, :not(a):not(b) > b`
+
+    // The NodeList of matching elements
+    var missingCoverageElements = document.querySelectorAll(selector);
+
+    var currentIndex;
+
+    function toggleClass(index) {
+        missingCoverageElements
+            .item(currentIndex)
+            .classList.remove('highlighted');
+        missingCoverageElements.item(index).classList.add('highlighted');
+    }
+
+    function makeCurrent(index) {
+        toggleClass(index);
+        currentIndex = index;
+        missingCoverageElements.item(index).scrollIntoView({
+            behavior: 'smooth',
+            block: 'center',
+            inline: 'center'
+        });
+    }
+
+    function goToPrevious() {
+        var nextIndex = 0;
+        if (typeof currentIndex !== 'number' || currentIndex === 0) {
+            nextIndex = missingCoverageElements.length - 1;
+        } else if (missingCoverageElements.length > 1) {
+            nextIndex = currentIndex - 1;
+        }
+
+        makeCurrent(nextIndex);
+    }
+
+    function goToNext() {
+        var nextIndex = 0;
+
+        if (
+            typeof currentIndex === 'number' &&
+            currentIndex < missingCoverageElements.length - 1
+        ) {
+            nextIndex = currentIndex + 1;
+        }
+
+        makeCurrent(nextIndex);
+    }
+
+    return function jump(event) {
+        if (
+            document.getElementById('fileSearch') === document.activeElement &&
+            document.activeElement != null
+        ) {
+            // if we're currently focused on the search input, we don't want to navigate
+            return;
+        }
+
+        switch (event.which) {
+            case 78: // n
+            case 74: // j
+                goToNext();
+                break;
+            case 66: // b
+            case 75: // k
+            case 80: // p
+                goToPrevious();
+                break;
+        }
+    };
+})();
+window.addEventListener('keydown', jumpToCode);
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/favicon.png b/vanilla/node_modules/istanbul-reports/lib/html/assets/favicon.png
new file mode 100644
index 0000000..c1525b8
Binary files /dev/null and b/vanilla/node_modules/istanbul-reports/lib/html/assets/favicon.png differ
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/sort-arrow-sprite.png b/vanilla/node_modules/istanbul-reports/lib/html/assets/sort-arrow-sprite.png
new file mode 100644
index 0000000..6ed6831
Binary files /dev/null and b/vanilla/node_modules/istanbul-reports/lib/html/assets/sort-arrow-sprite.png differ
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/sorter.js b/vanilla/node_modules/istanbul-reports/lib/html/assets/sorter.js
new file mode 100644
index 0000000..83122f7
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/assets/sorter.js
@@ -0,0 +1,209 @@
+var addSorting = (function() {
+    'use strict';
+    var cols,
+        currentSort = {
+            index: 0,
+            desc: false
+        };
+
+    // returns the summary table element
+    function getTable() {
+        return document.querySelector('.coverage-summary');
+    }
+    // returns the thead element of the summary table
+    function getTableHeader() {
+        return getTable().querySelector('thead tr');
+    }
+    // returns the tbody element of the summary table
+    function getTableBody() {
+        return getTable().querySelector('tbody');
+    }
+    // returns the th element for nth column
+    function getNthColumn(n) {
+        return getTableHeader().querySelectorAll('th')[n];
+    }
+
+    function onFilterInput() {
+        const searchValue = document.getElementById('fileSearch').value;
+        const rows = document.getElementsByTagName('tbody')[0].children;
+
+        // Try to create a RegExp from the searchValue. If it fails (invalid regex),
+        // it will be treated as a plain text search
+        let searchRegex;
+        try {
+            searchRegex = new RegExp(searchValue, 'i'); // 'i' for case-insensitive
+        } catch (error) {
+            searchRegex = null;
+        }
+
+        for (let i = 0; i < rows.length; i++) {
+            const row = rows[i];
+            let isMatch = false;
+
+            if (searchRegex) {
+                // If a valid regex was created, use it for matching
+                isMatch = searchRegex.test(row.textContent);
+            } else {
+                // Otherwise, fall back to the original plain text search
+                isMatch = row.textContent
+                    .toLowerCase()
+                    .includes(searchValue.toLowerCase());
+            }
+
+            row.style.display = isMatch ? '' : 'none';
+        }
+    }
+
+    // loads the search box
+    function addSearchBox() {
+        var template = document.getElementById('filterTemplate');
+        var templateClone = template.content.cloneNode(true);
+        templateClone.getElementById('fileSearch').oninput = onFilterInput;
+        template.parentElement.appendChild(templateClone);
+    }
+
+    // loads all columns
+    function loadColumns() {
+        var colNodes = getTableHeader().querySelectorAll('th'),
+            colNode,
+            cols = [],
+            col,
+            i;
+
+        for (i = 0; i < colNodes.length; i += 1) {
+            colNode = colNodes[i];
+            col = {
+                key: colNode.getAttribute('data-col'),
+                sortable: !colNode.getAttribute('data-nosort'),
+                type: colNode.getAttribute('data-type') || 'string'
+            };
+            cols.push(col);
+            if (col.sortable) {
+                col.defaultDescSort = col.type === 'number';
+                colNode.innerHTML =
+                    colNode.innerHTML + '<span class="sorter"></span>';
+            }
+        }
+        return cols;
+    }
+    // attaches a data attribute to every tr element with an object
+    // of data values keyed by column name
+    function loadRowData(tableRow) {
+        var tableCols = tableRow.querySelectorAll('td'),
+            colNode,
+            col,
+            data = {},
+            i,
+            val;
+        for (i = 0; i < tableCols.length; i += 1) {
+            colNode = tableCols[i];
+            col = cols[i];
+            val = colNode.getAttribute('data-value');
+            if (col.type === 'number') {
+                val = Number(val);
+            }
+            data[col.key] = val;
+        }
+        return data;
+    }
+    // loads all row data
+    function loadData() {
+        var rows = getTableBody().querySelectorAll('tr'),
+            i;
+
+        for (i = 0; i < rows.length; i += 1) {
+            rows[i].data = loadRowData(rows[i]);
+        }
+    }
+    // sorts the table using the data for the ith column
+    function sortByIndex(index, desc) {
+        var key = cols[index].key,
+            sorter = function(a, b) {
+                a = a.data[key];
+                b = b.data[key];
+                return a < b ? -1 : a > b ? 1 : 0;
+            },
+            finalSorter = sorter,
+            tableBody = document.querySelector('.coverage-summary tbody'),
+            rowNodes = tableBody.querySelectorAll('tr'),
+            rows = [],
+            i;
+
+        if (desc) {
+            finalSorter = function(a, b) {
+                return -1 * sorter(a, b);
+            };
+        }
+
+        for (i = 0; i < rowNodes.length; i += 1) {
+            rows.push(rowNodes[i]);
+            tableBody.removeChild(rowNodes[i]);
+        }
+
+        rows.sort(finalSorter);
+
+        for (i = 0; i < rows.length; i += 1) {
+            tableBody.appendChild(rows[i]);
+        }
+    }
+    // removes sort indicators for current column being sorted
+    function removeSortIndicators() {
+        var col = getNthColumn(currentSort.index),
+            cls = col.className;
+
+        cls = cls.replace(/ sorted$/, '').replace(/ sorted-desc$/, '');
+        col.className = cls;
+    }
+    // adds sort indicators for current column being sorted
+    function addSortIndicators() {
+        getNthColumn(currentSort.index).className += currentSort.desc
+            ? ' sorted-desc'
+            : ' sorted';
+    }
+    // adds event listeners for all sorter widgets
+    function enableUI() {
+        var i,
+            el,
+            ithSorter = function ithSorter(i) {
+                var col = cols[i];
+
+                return function() {
+                    var desc = col.defaultDescSort;
+
+                    if (currentSort.index === i) {
+                        desc = !currentSort.desc;
+                    }
+                    sortByIndex(i, desc);
+                    removeSortIndicators();
+                    currentSort.index = i;
+                    currentSort.desc = desc;
+                    addSortIndicators();
+                };
+            };
+        for (i = 0; i < cols.length; i += 1) {
+            if (cols[i].sortable) {
+                // add the click event handler on the th so users
+                // dont have to click on those tiny arrows
+                el = getNthColumn(i).querySelector('.sorter').parentElement;
+                if (el.addEventListener) {
+                    el.addEventListener('click', ithSorter(i));
+                } else {
+                    el.attachEvent('onclick', ithSorter(i));
+                }
+            }
+        }
+    }
+    // adds sorting functionality to the UI
+    return function() {
+        if (!getTable()) {
+            return;
+        }
+        cols = loadColumns();
+        loadData();
+        addSearchBox();
+        addSortIndicators();
+        enableUI();
+    };
+})();
+
+window.addEventListener('load', addSorting);
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.css b/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.css
new file mode 100644
index 0000000..b317a7c
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.css
@@ -0,0 +1 @@
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diff --git a/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.js b/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.js
new file mode 100644
index 0000000..ef51e03
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/assets/vendor/prettify.js
@@ -0,0 +1 @@
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diff --git a/vanilla/node_modules/istanbul-reports/lib/html/index.js b/vanilla/node_modules/istanbul-reports/lib/html/index.js
new file mode 100644
index 0000000..2d7f7be
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/index.js
@@ -0,0 +1,421 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const fs = require('fs');
+const path = require('path');
+const html = require('html-escaper');
+const { ReportBase } = require('istanbul-lib-report');
+const annotator = require('./annotator');
+
+function htmlHead(details) {
+    return `
+<head>
+    <title>Code coverage report for ${html.escape(details.entity)}</title>
+    <meta charset="utf-8" />
+    <link rel="stylesheet" href="${html.escape(details.prettify.css)}" />
+    <link rel="stylesheet" href="${html.escape(details.base.css)}" />
+    <link rel="shortcut icon" type="image/x-icon" href="${html.escape(
+        details.favicon
+    )}" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style type='text/css'>
+        .coverage-summary .sorter {
+            background-image: url(${html.escape(details.sorter.image)});
+        }
+    </style>
+</head>
+    `;
+}
+
+function headerTemplate(details) {
+    function metricsTemplate({ pct, covered, total }, kind) {
+        return `
+            <div class='fl pad1y space-right2'>
+                <span class="strong">${pct}% </span>
+                <span class="quiet">${kind}</span>
+                <span class='fraction'>${covered}/${total}</span>
+            </div>
+        `;
+    }
+
+    function skipTemplate(metrics) {
+        const statements = metrics.statements.skipped;
+        const branches = metrics.branches.skipped;
+        const functions = metrics.functions.skipped;
+
+        const countLabel = (c, label, plural) =>
+            c === 0 ? [] : `${c} ${label}${c === 1 ? '' : plural}`;
+        const skips = [].concat(
+            countLabel(statements, 'statement', 's'),
+            countLabel(functions, 'function', 's'),
+            countLabel(branches, 'branch', 'es')
+        );
+
+        if (skips.length === 0) {
+            return '';
+        }
+
+        return `
+            <div class='fl pad1y'>
+                <span class="strong">${skips.join(', ')}</span>
+                <span class="quiet">Ignored</span>  &nbsp;&nbsp;&nbsp;&nbsp;
+            </div>
+        `;
+    }
+
+    return `
+<!doctype html>
+<html lang="en">
+${htmlHead(details)}
+<body>
+<div class='wrapper'>
+    <div class='pad1'>
+        <h1>${details.pathHtml}</h1>
+        <div class='clearfix'>
+            ${metricsTemplate(details.metrics.statements, 'Statements')}
+            ${metricsTemplate(details.metrics.branches, 'Branches')}
+            ${metricsTemplate(details.metrics.functions, 'Functions')}
+            ${metricsTemplate(details.metrics.lines, 'Lines')}
+            ${skipTemplate(details.metrics)}
+        </div>
+        <p class="quiet">
+            Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
+        </p>
+        <template id="filterTemplate">
+            <div class="quiet">
+                Filter:
+                <input type="search" id="fileSearch">
+            </div>
+        </template>
+    </div>
+    <div class='status-line ${details.reportClass}'></div>
+    `;
+}
+
+function footerTemplate(details) {
+    return `
+                <div class='push'></div><!-- for sticky footer -->
+            </div><!-- /wrapper -->
+            <div class='footer quiet pad2 space-top1 center small'>
+                Code coverage generated by
+                <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a>
+                at ${html.escape(details.datetime)}
+            </div>
+        <script src="${html.escape(details.prettify.js)}"></script>
+        <script>
+            window.onload = function () {
+                prettyPrint();
+            };
+        </script>
+        <script src="${html.escape(details.sorter.js)}"></script>
+        <script src="${html.escape(details.blockNavigation.js)}"></script>
+    </body>
+</html>
+    `;
+}
+
+function detailTemplate(data) {
+    const lineNumbers = new Array(data.maxLines).fill().map((_, i) => i + 1);
+    const lineLink = num =>
+        `<a name='L${num}'></a><a href='#L${num}'>${num}</a>`;
+    const lineCount = line =>
+        `<span class="cline-any cline-${line.covered}">${line.hits}</span>`;
+
+    /* This is rendered in a `<pre>`, need control of all whitespace. */
+    return [
+        '<tr>',
+        `<td class="line-count quiet">${lineNumbers
+            .map(lineLink)
+            .join('\n')}</td>`,
+        `<td class="line-coverage quiet">${data.lineCoverage
+            .map(lineCount)
+            .join('\n')}</td>`,
+        `<td class="text"><pre class="prettyprint lang-js">${data.annotatedCode.join(
+            '\n'
+        )}</pre></td>`,
+        '</tr>'
+    ].join('');
+}
+const summaryTableHeader = [
+    '<div class="pad1">',
+    '<table class="coverage-summary">',
+    '<thead>',
+    '<tr>',
+    '   <th data-col="file" data-fmt="html" data-html="true" class="file">File</th>',
+    '   <th data-col="pic" data-type="number" data-fmt="html" data-html="true" class="pic"></th>',
+    '   <th data-col="statements" data-type="number" data-fmt="pct" class="pct">Statements</th>',
+    '   <th data-col="statements_raw" data-type="number" data-fmt="html" class="abs"></th>',
+    '   <th data-col="branches" data-type="number" data-fmt="pct" class="pct">Branches</th>',
+    '   <th data-col="branches_raw" data-type="number" data-fmt="html" class="abs"></th>',
+    '   <th data-col="functions" data-type="number" data-fmt="pct" class="pct">Functions</th>',
+    '   <th data-col="functions_raw" data-type="number" data-fmt="html" class="abs"></th>',
+    '   <th data-col="lines" data-type="number" data-fmt="pct" class="pct">Lines</th>',
+    '   <th data-col="lines_raw" data-type="number" data-fmt="html" class="abs"></th>',
+    '</tr>',
+    '</thead>',
+    '<tbody>'
+].join('\n');
+
+function summaryLineTemplate(details) {
+    const { reportClasses, metrics, file, output } = details;
+    const percentGraph = pct => {
+        if (!isFinite(pct)) {
+            return '';
+        }
+
+        const cls = ['cover-fill'];
+        if (pct === 100) {
+            cls.push('cover-full');
+        }
+
+        pct = Math.floor(pct);
+        return [
+            `<div class="${cls.join(' ')}" style="width: ${pct}%"></div>`,
+            `<div class="cover-empty" style="width: ${100 - pct}%"></div>`
+        ].join('');
+    };
+    const summaryType = (type, showGraph = false) => {
+        const info = metrics[type];
+        const reportClass = reportClasses[type];
+        const result = [
+            `<td data-value="${info.pct}" class="pct ${reportClass}">${info.pct}%</td>`,
+            `<td data-value="${info.total}" class="abs ${reportClass}">${info.covered}/${info.total}</td>`
+        ];
+        if (showGraph) {
+            result.unshift(
+                `<td data-value="${info.pct}" class="pic ${reportClass}">`,
+                `<div class="chart">${percentGraph(info.pct)}</div>`,
+                `</td>`
+            );
+        }
+
+        return result;
+    };
+
+    return []
+        .concat(
+            '<tr>',
+            `<td class="file ${
+                reportClasses.statements
+            }" data-value="${html.escape(file)}"><a href="${html.escape(
+                output
+            )}">${html.escape(file)}</a></td>`,
+            summaryType('statements', true),
+            summaryType('branches'),
+            summaryType('functions'),
+            summaryType('lines'),
+            '</tr>\n'
+        )
+        .join('\n\t');
+}
+
+const summaryTableFooter = ['</tbody>', '</table>', '</div>'].join('\n');
+const emptyClasses = {
+    statements: 'empty',
+    lines: 'empty',
+    functions: 'empty',
+    branches: 'empty'
+};
+
+const standardLinkMapper = {
+    getPath(node) {
+        if (typeof node === 'string') {
+            return node;
+        }
+        let filePath = node.getQualifiedName();
+        if (node.isSummary()) {
+            if (filePath !== '') {
+                filePath += '/index.html';
+            } else {
+                filePath = 'index.html';
+            }
+        } else {
+            filePath += '.html';
+        }
+        return filePath;
+    },
+
+    relativePath(source, target) {
+        const targetPath = this.getPath(target);
+        const sourcePath = path.dirname(this.getPath(source));
+        return path.posix.relative(sourcePath, targetPath);
+    },
+
+    assetPath(node, name) {
+        return this.relativePath(this.getPath(node), name);
+    }
+};
+
+function fixPct(metrics) {
+    Object.keys(emptyClasses).forEach(key => {
+        metrics[key].pct = 0;
+    });
+    return metrics;
+}
+
+class HtmlReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        this.verbose = opts.verbose;
+        this.linkMapper = opts.linkMapper || standardLinkMapper;
+        this.subdir = opts.subdir || '';
+        this.date = new Date().toISOString();
+        this.skipEmpty = opts.skipEmpty;
+    }
+
+    getBreadcrumbHtml(node) {
+        let parent = node.getParent();
+        const nodePath = [];
+
+        while (parent) {
+            nodePath.push(parent);
+            parent = parent.getParent();
+        }
+
+        const linkPath = nodePath.map(ancestor => {
+            const target = this.linkMapper.relativePath(node, ancestor);
+            const name = ancestor.getRelativeName() || 'All files';
+            return '<a href="' + target + '">' + name + '</a>';
+        });
+
+        linkPath.reverse();
+        return linkPath.length > 0
+            ? linkPath.join(' / ') + ' ' + node.getRelativeName()
+            : 'All files';
+    }
+
+    fillTemplate(node, templateData, context) {
+        const linkMapper = this.linkMapper;
+        const summary = node.getCoverageSummary();
+        templateData.entity = node.getQualifiedName() || 'All files';
+        templateData.metrics = summary;
+        templateData.reportClass = context.classForPercent(
+            'statements',
+            summary.statements.pct
+        );
+        templateData.pathHtml = this.getBreadcrumbHtml(node);
+        templateData.base = {
+            css: linkMapper.assetPath(node, 'base.css')
+        };
+        templateData.sorter = {
+            js: linkMapper.assetPath(node, 'sorter.js'),
+            image: linkMapper.assetPath(node, 'sort-arrow-sprite.png')
+        };
+        templateData.blockNavigation = {
+            js: linkMapper.assetPath(node, 'block-navigation.js')
+        };
+        templateData.prettify = {
+            js: linkMapper.assetPath(node, 'prettify.js'),
+            css: linkMapper.assetPath(node, 'prettify.css')
+        };
+        templateData.favicon = linkMapper.assetPath(node, 'favicon.png');
+    }
+
+    getTemplateData() {
+        return { datetime: this.date };
+    }
+
+    getWriter(context) {
+        if (!this.subdir) {
+            return context.writer;
+        }
+        return context.writer.writerForDir(this.subdir);
+    }
+
+    onStart(root, context) {
+        const assetHeaders = {
+            '.js': '/* eslint-disable */\n'
+        };
+
+        ['.', 'vendor'].forEach(subdir => {
+            const writer = this.getWriter(context);
+            const srcDir = path.resolve(__dirname, 'assets', subdir);
+            fs.readdirSync(srcDir).forEach(f => {
+                const resolvedSource = path.resolve(srcDir, f);
+                const resolvedDestination = '.';
+                const stat = fs.statSync(resolvedSource);
+                let dest;
+
+                if (stat.isFile()) {
+                    dest = resolvedDestination + '/' + f;
+                    if (this.verbose) {
+                        console.log('Write asset: ' + dest);
+                    }
+                    writer.copyFile(
+                        resolvedSource,
+                        dest,
+                        assetHeaders[path.extname(f)]
+                    );
+                }
+            });
+        });
+    }
+
+    onSummary(node, context) {
+        const linkMapper = this.linkMapper;
+        const templateData = this.getTemplateData();
+        const children = node.getChildren();
+        const skipEmpty = this.skipEmpty;
+
+        this.fillTemplate(node, templateData, context);
+        const cw = this.getWriter(context).writeFile(linkMapper.getPath(node));
+        cw.write(headerTemplate(templateData));
+        cw.write(summaryTableHeader);
+        children.forEach(child => {
+            const metrics = child.getCoverageSummary();
+            const isEmpty = metrics.isEmpty();
+            if (skipEmpty && isEmpty) {
+                return;
+            }
+            const reportClasses = isEmpty
+                ? emptyClasses
+                : {
+                      statements: context.classForPercent(
+                          'statements',
+                          metrics.statements.pct
+                      ),
+                      lines: context.classForPercent(
+                          'lines',
+                          metrics.lines.pct
+                      ),
+                      functions: context.classForPercent(
+                          'functions',
+                          metrics.functions.pct
+                      ),
+                      branches: context.classForPercent(
+                          'branches',
+                          metrics.branches.pct
+                      )
+                  };
+            const data = {
+                metrics: isEmpty ? fixPct(metrics) : metrics,
+                reportClasses,
+                file: child.getRelativeName(),
+                output: linkMapper.relativePath(node, child)
+            };
+            cw.write(summaryLineTemplate(data) + '\n');
+        });
+        cw.write(summaryTableFooter);
+        cw.write(footerTemplate(templateData));
+        cw.close();
+    }
+
+    onDetail(node, context) {
+        const linkMapper = this.linkMapper;
+        const templateData = this.getTemplateData();
+
+        this.fillTemplate(node, templateData, context);
+        const cw = this.getWriter(context).writeFile(linkMapper.getPath(node));
+        cw.write(headerTemplate(templateData));
+        cw.write('<pre><table class="coverage">\n');
+        cw.write(detailTemplate(annotator(node.getFileCoverage(), context)));
+        cw.write('</table></pre>\n');
+        cw.write(footerTemplate(templateData));
+        cw.close();
+    }
+}
+
+module.exports = HtmlReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/html/insertion-text.js b/vanilla/node_modules/istanbul-reports/lib/html/insertion-text.js
new file mode 100644
index 0000000..6f80642
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/html/insertion-text.js
@@ -0,0 +1,114 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+function InsertionText(text, consumeBlanks) {
+    this.text = text;
+    this.origLength = text.length;
+    this.offsets = [];
+    this.consumeBlanks = consumeBlanks;
+    this.startPos = this.findFirstNonBlank();
+    this.endPos = this.findLastNonBlank();
+}
+
+const WHITE_RE = /[ \f\n\r\t\v\u00A0\u2028\u2029]/;
+
+InsertionText.prototype = {
+    findFirstNonBlank() {
+        let pos = -1;
+        const text = this.text;
+        const len = text.length;
+        let i;
+        for (i = 0; i < len; i += 1) {
+            if (!text.charAt(i).match(WHITE_RE)) {
+                pos = i;
+                break;
+            }
+        }
+        return pos;
+    },
+    findLastNonBlank() {
+        const text = this.text;
+        const len = text.length;
+        let pos = text.length + 1;
+        let i;
+        for (i = len - 1; i >= 0; i -= 1) {
+            if (!text.charAt(i).match(WHITE_RE)) {
+                pos = i;
+                break;
+            }
+        }
+        return pos;
+    },
+    originalLength() {
+        return this.origLength;
+    },
+
+    insertAt(col, str, insertBefore, consumeBlanks) {
+        consumeBlanks =
+            typeof consumeBlanks === 'undefined'
+                ? this.consumeBlanks
+                : consumeBlanks;
+        col = col > this.originalLength() ? this.originalLength() : col;
+        col = col < 0 ? 0 : col;
+
+        if (consumeBlanks) {
+            if (col <= this.startPos) {
+                col = 0;
+            }
+            if (col > this.endPos) {
+                col = this.origLength;
+            }
+        }
+
+        const len = str.length;
+        const offset = this.findOffset(col, len, insertBefore);
+        const realPos = col + offset;
+        const text = this.text;
+        this.text = text.substring(0, realPos) + str + text.substring(realPos);
+        return this;
+    },
+
+    findOffset(pos, len, insertBefore) {
+        const offsets = this.offsets;
+        let offsetObj;
+        let cumulativeOffset = 0;
+        let i;
+
+        for (i = 0; i < offsets.length; i += 1) {
+            offsetObj = offsets[i];
+            if (
+                offsetObj.pos < pos ||
+                (offsetObj.pos === pos && !insertBefore)
+            ) {
+                cumulativeOffset += offsetObj.len;
+            }
+            if (offsetObj.pos >= pos) {
+                break;
+            }
+        }
+        if (offsetObj && offsetObj.pos === pos) {
+            offsetObj.len += len;
+        } else {
+            offsets.splice(i, 0, { pos, len });
+        }
+        return cumulativeOffset;
+    },
+
+    wrap(startPos, startText, endPos, endText, consumeBlanks) {
+        this.insertAt(startPos, startText, true, consumeBlanks);
+        this.insertAt(endPos, endText, false, consumeBlanks);
+        return this;
+    },
+
+    wrapLine(startText, endText) {
+        this.wrap(0, startText, this.originalLength(), endText);
+    },
+
+    toString() {
+        return this.text;
+    }
+};
+
+module.exports = InsertionText;
diff --git a/vanilla/node_modules/istanbul-reports/lib/json-summary/index.js b/vanilla/node_modules/istanbul-reports/lib/json-summary/index.js
new file mode 100644
index 0000000..318a47f
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/json-summary/index.js
@@ -0,0 +1,56 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+class JsonSummaryReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        this.file = opts.file || 'coverage-summary.json';
+        this.contentWriter = null;
+        this.first = true;
+    }
+
+    onStart(root, context) {
+        this.contentWriter = context.writer.writeFile(this.file);
+        this.contentWriter.write('{');
+    }
+
+    writeSummary(filePath, sc) {
+        const cw = this.contentWriter;
+        if (this.first) {
+            this.first = false;
+        } else {
+            cw.write(',');
+        }
+        cw.write(JSON.stringify(filePath));
+        cw.write(': ');
+        cw.write(JSON.stringify(sc));
+        cw.println('');
+    }
+
+    onSummary(node) {
+        if (!node.isRoot()) {
+            return;
+        }
+        this.writeSummary('total', node.getCoverageSummary());
+    }
+
+    onDetail(node) {
+        this.writeSummary(
+            node.getFileCoverage().path,
+            node.getCoverageSummary()
+        );
+    }
+
+    onEnd() {
+        const cw = this.contentWriter;
+        cw.println('}');
+        cw.close();
+    }
+}
+
+module.exports = JsonSummaryReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/json/index.js b/vanilla/node_modules/istanbul-reports/lib/json/index.js
new file mode 100644
index 0000000..bcae6ae
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/json/index.js
@@ -0,0 +1,44 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+class JsonReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        this.file = opts.file || 'coverage-final.json';
+        this.first = true;
+    }
+
+    onStart(root, context) {
+        this.contentWriter = context.writer.writeFile(this.file);
+        this.contentWriter.write('{');
+    }
+
+    onDetail(node) {
+        const fc = node.getFileCoverage();
+        const key = fc.path;
+        const cw = this.contentWriter;
+
+        if (this.first) {
+            this.first = false;
+        } else {
+            cw.write(',');
+        }
+        cw.write(JSON.stringify(key));
+        cw.write(': ');
+        cw.write(JSON.stringify(fc));
+        cw.println('');
+    }
+
+    onEnd() {
+        const cw = this.contentWriter;
+        cw.println('}');
+        cw.close();
+    }
+}
+
+module.exports = JsonReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/lcov/index.js b/vanilla/node_modules/istanbul-reports/lib/lcov/index.js
new file mode 100644
index 0000000..383c202
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/lcov/index.js
@@ -0,0 +1,33 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const { ReportBase } = require('istanbul-lib-report');
+const LcovOnlyReport = require('../lcovonly');
+const HtmlReport = require('../html');
+
+class LcovReport extends ReportBase {
+    constructor(opts) {
+        super();
+        this.lcov = new LcovOnlyReport({ file: 'lcov.info', ...opts });
+        this.html = new HtmlReport({ subdir: 'lcov-report' });
+    }
+}
+
+['Start', 'End', 'Summary', 'SummaryEnd', 'Detail'].forEach(what => {
+    const meth = 'on' + what;
+    LcovReport.prototype[meth] = function(...args) {
+        const lcov = this.lcov;
+        const html = this.html;
+
+        if (lcov[meth]) {
+            lcov[meth](...args);
+        }
+        if (html[meth]) {
+            html[meth](...args);
+        }
+    };
+});
+
+module.exports = LcovReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/lcovonly/index.js b/vanilla/node_modules/istanbul-reports/lib/lcovonly/index.js
new file mode 100644
index 0000000..0720e46
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/lcovonly/index.js
@@ -0,0 +1,77 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+class LcovOnlyReport extends ReportBase {
+    constructor(opts) {
+        super();
+        opts = opts || {};
+        this.file = opts.file || 'lcov.info';
+        this.projectRoot = opts.projectRoot || process.cwd();
+        this.contentWriter = null;
+    }
+
+    onStart(root, context) {
+        this.contentWriter = context.writer.writeFile(this.file);
+    }
+
+    onDetail(node) {
+        const fc = node.getFileCoverage();
+        const writer = this.contentWriter;
+        const functions = fc.f;
+        const functionMap = fc.fnMap;
+        const lines = fc.getLineCoverage();
+        const branches = fc.b;
+        const branchMap = fc.branchMap;
+        const summary = node.getCoverageSummary();
+        const path = require('path');
+
+        writer.println('TN:');
+        const fileName = path.relative(this.projectRoot, fc.path);
+        writer.println('SF:' + fileName);
+
+        Object.values(functionMap).forEach(meta => {
+            // Some versions of the instrumenter in the wild populate 'loc'
+            // but not 'decl':
+            const decl = meta.decl || meta.loc;
+            writer.println('FN:' + [decl.start.line, meta.name].join(','));
+        });
+        writer.println('FNF:' + summary.functions.total);
+        writer.println('FNH:' + summary.functions.covered);
+
+        Object.entries(functionMap).forEach(([key, meta]) => {
+            const stats = functions[key];
+            writer.println('FNDA:' + [stats, meta.name].join(','));
+        });
+
+        Object.entries(lines).forEach(entry => {
+            writer.println('DA:' + entry.join(','));
+        });
+        writer.println('LF:' + summary.lines.total);
+        writer.println('LH:' + summary.lines.covered);
+
+        Object.entries(branches).forEach(([key, branchArray]) => {
+            const meta = branchMap[key];
+            if (meta) {
+                const { line } = meta.loc.start;
+                branchArray.forEach((b, i) => {
+                    writer.println('BRDA:' + [line, key, i, b].join(','));
+                });
+            } else {
+                console.warn('Missing coverage entries in', fileName, key);
+            }
+        });
+        writer.println('BRF:' + summary.branches.total);
+        writer.println('BRH:' + summary.branches.covered);
+        writer.println('end_of_record');
+    }
+
+    onEnd() {
+        this.contentWriter.close();
+    }
+}
+
+module.exports = LcovOnlyReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/none/index.js b/vanilla/node_modules/istanbul-reports/lib/none/index.js
new file mode 100644
index 0000000..81c1408
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/none/index.js
@@ -0,0 +1,10 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const { ReportBase } = require('istanbul-lib-report');
+
+class NoneReport extends ReportBase {}
+
+module.exports = NoneReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/teamcity/index.js b/vanilla/node_modules/istanbul-reports/lib/teamcity/index.js
new file mode 100644
index 0000000..2bca26a
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/teamcity/index.js
@@ -0,0 +1,67 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+class TeamcityReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        opts = opts || {};
+        this.file = opts.file || null;
+        this.blockName = opts.blockName || 'Code Coverage Summary';
+    }
+
+    onStart(node, context) {
+        const metrics = node.getCoverageSummary();
+        const cw = context.writer.writeFile(this.file);
+
+        cw.println('');
+        cw.println("##teamcity[blockOpened name='" + this.blockName + "']");
+
+        //Statements Covered
+        cw.println(
+            lineForKey(metrics.statements.covered, 'CodeCoverageAbsBCovered')
+        );
+        cw.println(
+            lineForKey(metrics.statements.total, 'CodeCoverageAbsBTotal')
+        );
+
+        //Branches Covered
+        cw.println(
+            lineForKey(metrics.branches.covered, 'CodeCoverageAbsRCovered')
+        );
+        cw.println(lineForKey(metrics.branches.total, 'CodeCoverageAbsRTotal'));
+
+        //Functions Covered
+        cw.println(
+            lineForKey(metrics.functions.covered, 'CodeCoverageAbsMCovered')
+        );
+        cw.println(
+            lineForKey(metrics.functions.total, 'CodeCoverageAbsMTotal')
+        );
+
+        //Lines Covered
+        cw.println(
+            lineForKey(metrics.lines.covered, 'CodeCoverageAbsLCovered')
+        );
+        cw.println(lineForKey(metrics.lines.total, 'CodeCoverageAbsLTotal'));
+
+        cw.println("##teamcity[blockClosed name='" + this.blockName + "']");
+        cw.close();
+    }
+}
+
+function lineForKey(value, teamcityVar) {
+    return (
+        "##teamcity[buildStatisticValue key='" +
+        teamcityVar +
+        "' value='" +
+        value +
+        "']"
+    );
+}
+
+module.exports = TeamcityReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/text-lcov/index.js b/vanilla/node_modules/istanbul-reports/lib/text-lcov/index.js
new file mode 100644
index 0000000..847aedf
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/text-lcov/index.js
@@ -0,0 +1,17 @@
+'use strict';
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+const LcovOnly = require('../lcovonly');
+
+class TextLcov extends LcovOnly {
+    constructor(opts) {
+        super({
+            ...opts,
+            file: '-'
+        });
+    }
+}
+
+module.exports = TextLcov;
diff --git a/vanilla/node_modules/istanbul-reports/lib/text-summary/index.js b/vanilla/node_modules/istanbul-reports/lib/text-summary/index.js
new file mode 100644
index 0000000..a9e6eab
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/text-summary/index.js
@@ -0,0 +1,62 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+class TextSummaryReport extends ReportBase {
+    constructor(opts) {
+        super();
+
+        opts = opts || {};
+        this.file = opts.file || null;
+    }
+
+    onStart(node, context) {
+        const summary = node.getCoverageSummary();
+        const cw = context.writer.writeFile(this.file);
+        const printLine = function(key) {
+            const str = lineForKey(summary, key);
+            const clazz = context.classForPercent(key, summary[key].pct);
+            cw.println(cw.colorize(str, clazz));
+        };
+
+        cw.println('');
+        cw.println(
+            '=============================== Coverage summary ==============================='
+        );
+        printLine('statements');
+        printLine('branches');
+        printLine('functions');
+        printLine('lines');
+        cw.println(
+            '================================================================================'
+        );
+        cw.close();
+    }
+}
+
+function lineForKey(summary, key) {
+    const metrics = summary[key];
+
+    key = key.substring(0, 1).toUpperCase() + key.substring(1);
+    if (key.length < 12) {
+        key += '                   '.substring(0, 12 - key.length);
+    }
+    const result = [
+        key,
+        ':',
+        metrics.pct + '%',
+        '(',
+        metrics.covered + '/' + metrics.total,
+        ')'
+    ].join(' ');
+    const skipped = metrics.skipped;
+    if (skipped > 0) {
+        return result + ', ' + skipped + ' ignored';
+    }
+    return result;
+}
+
+module.exports = TextSummaryReport;
diff --git a/vanilla/node_modules/istanbul-reports/lib/text/index.js b/vanilla/node_modules/istanbul-reports/lib/text/index.js
new file mode 100644
index 0000000..c28cedb
--- /dev/null
+++ b/vanilla/node_modules/istanbul-reports/lib/text/index.js
@@ -0,0 +1,298 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE
+ file for terms.
+ */
+'use strict';
+const { ReportBase } = require('istanbul-lib-report');
+
+const NAME_COL = 4;
+const PCT_COLS = 7;
+const MISSING_COL = 17;
+const TAB_SIZE = 1;
+const DELIM = ' | ';
+
+function padding(num, ch) {
+    let str = '';
+    let i;
+    ch = ch || ' ';
+    for (i = 0; i < num; i += 1) {
+        str += ch;
+    }
+    return str;
+}
+
+function fill(str, width, right, tabs) {
+    tabs = tabs || 0;
+    str = String(str);
+
+    const leadingSpaces = tabs * TAB_SIZE;
+    const remaining = width - leadingSpaces;
+    const leader = padding(leadingSpaces);
+    let fmtStr = '';
+
+    if (remaining > 0) {
+        const strlen = str.length;
+        let fillStr;
+
+        if (remaining >= strlen) {
+            fillStr = padding(remaining - strlen);
+        } else {
+            fillStr = '...';
+            const length = remaining - fillStr.length;
+
+            str = str.substring(strlen - length);
+            right = true;
+        }
+        fmtStr = right ? fillStr + str : str + fillStr;
+    }
+
+    return leader + fmtStr;
+}
+
+function formatName(name, maxCols, level) {
+    return fill(name, maxCols, false, level);
+}
+
+function formatPct(pct, width) {
+    return fill(pct, width || PCT_COLS, true, 0);
+}
+
+function nodeMissing(node) {
+    if (node.isSummary()) {
+        return '';
+    }
+
+    const metrics = node.getCoverageSummary();
+    const isEmpty = metrics.isEmpty();
+    const lines = isEmpty ? 0 : metrics.lines.pct;
+
+    let coveredLines;
+
+    const fileCoverage = node.getFileCoverage();
+    if (lines === 100) {
+        const branches = fileCoverage.getBranchCoverageByLine();
+        coveredLines = Object.entries(branches).map(([key, { coverage }]) => [
+            key,
+            coverage === 100
+        ]);
+    } else {
+        coveredLines = Object.entries(fileCoverage.getLineCoverage());
+    }
+
+    let newRange = true;
+    const ranges = coveredLines
+        .reduce((acum, [line, hit]) => {
+            if (hit) newRange = true;
+            else {
+                line = parseInt(line);
+                if (newRange) {
+                    acum.push([line]);
+                    newRange = false;
+                } else acum[acum.length - 1][1] = line;
+            }
+
+            return acum;
+        }, [])
+        .map(range => {
+            const { length } = range;
+
+            if (length === 1) return range[0];
+
+            return `${range[0]}-${range[1]}`;
+        });
+
+    return [].concat(...ranges).join(',');
+}
+
+function nodeName(node) {
+    return node.getRelativeName() || 'All files';
+}
+
+function depthFor(node) {
+    let ret = 0;
+    node = node.getParent();
+    while (node) {
+        ret += 1;
+        node = node.getParent();
+    }
+    return ret;
+}
+
+function nullDepthFor() {
+    return 0;
+}
+
+function findWidth(node, context, nodeExtractor, depthFor = nullDepthFor) {
+    let last = 0;
+    function compareWidth(node) {
+        last = Math.max(
+            last,
+            TAB_SIZE * depthFor(node) + nodeExtractor(node).length
+        );
+    }
+    const visitor = {
+        onSummary: compareWidth,
+        onDetail: compareWidth
+    };
+    node.visit(context.getVisitor(visitor));
+    return last;
+}
+
+function makeLine(nameWidth, missingWidth) {
+    const name = padding(nameWidth, '-');
+    const pct = padding(PCT_COLS, '-');
+    const elements = [];
+
+    elements.push(name);
+    elements.push(pct);
+    elements.push(padding(PCT_COLS + 1, '-'));
+    elements.push(pct);
+    elements.push(pct);
+    elements.push(padding(missingWidth, '-'));
+    return elements.join(DELIM.replace(/ /g, '-')) + '-';
+}
+
+function tableHeader(maxNameCols, missingWidth) {
+    const elements = [];
+    elements.push(formatName('File', maxNameCols, 0));
+    elements.push(formatPct('% Stmts'));
+    elements.push(formatPct('% Branch', PCT_COLS + 1));
+    elements.push(formatPct('% Funcs'));
+    elements.push(formatPct('% Lines'));
+    elements.push(formatName('Uncovered Line #s', missingWidth));
+    return elements.join(DELIM) + ' ';
+}
+
+function isFull(metrics) {
+    return (
+        metrics.statements.pct === 100 &&
+        metrics.branches.pct === 100 &&
+        metrics.functions.pct === 100 &&
+        metrics.lines.pct === 100
+    );
+}
+
+function tableRow(
+    node,
+    context,
+    colorizer,
+    maxNameCols,
+    level,
+    skipEmpty,
+    skipFull,
+    missingWidth
+) {
+    const name = nodeName(node);
+    const metrics = node.getCoverageSummary();
+    const isEmpty = metrics.isEmpty();
+    if (skipEmpty && isEmpty) {
+        return '';
+    }
+    if (skipFull && isFull(metrics)) {
+        return '';
+    }
+
+    const mm = {
+        statements: isEmpty ? 0 : metrics.statements.pct,
+        branches: isEmpty ? 0 : metrics.branches.pct,
+        functions: isEmpty ? 0 : metrics.functions.pct,
+        lines: isEmpty ? 0 : metrics.lines.pct
+    };
+    const colorize = isEmpty
+        ? function(str) {
+              return str;
+          }
+        : function(str, key) {
+              return colorizer(str, context.classForPercent(key, mm[key]));
+          };
+    const elements = [];
+
+    elements.push(colorize(formatName(name, maxNameCols, level), 'statements'));
+    elements.push(colorize(formatPct(mm.statements), 'statements'));
+    elements.push(colorize(formatPct(mm.branches, PCT_COLS + 1), 'branches'));
+    elements.push(colorize(formatPct(mm.functions), 'functions'));
+    elements.push(colorize(formatPct(mm.lines), 'lines'));
+    elements.push(
+        colorizer(
+            formatName(nodeMissing(node), missingWidth),
+            mm.lines === 100 ? 'medium' : 'low'
+        )
+    );
+
+    return elements.join(DELIM) + ' ';
+}
+
+class TextReport extends ReportBase {
+    constructor(opts) {
+        super(opts);
+
+        opts = opts || {};
+        const { maxCols } = opts;
+
+        this.file = opts.file || null;
+        this.maxCols = maxCols != null ? maxCols : process.stdout.columns || 80;
+        this.cw = null;
+        this.skipEmpty = opts.skipEmpty;
+        this.skipFull = opts.skipFull;
+    }
+
+    onStart(root, context) {
+        this.cw = context.writer.writeFile(this.file);
+        this.nameWidth = Math.max(
+            NAME_COL,
+            findWidth(root, context, nodeName, depthFor)
+        );
+        this.missingWidth = Math.max(
+            MISSING_COL,
+            findWidth(root, context, nodeMissing)
+        );
+
+        if (this.maxCols > 0) {
+            const pct_cols = DELIM.length + 4 * (PCT_COLS + DELIM.length) + 2;
+
+            const maxRemaining = this.maxCols - (pct_cols + MISSING_COL);
+            if (this.nameWidth > maxRemaining) {
+                this.nameWidth = maxRemaining;
+                this.missingWidth = MISSING_COL;
+            } else if (this.nameWidth < maxRemaining) {
+                const maxRemaining = this.maxCols - (this.nameWidth + pct_cols);
+                if (this.missingWidth > maxRemaining) {
+                    this.missingWidth = maxRemaining;
+                }
+            }
+        }
+        const line = makeLine(this.nameWidth, this.missingWidth);
+        this.cw.println(line);
+        this.cw.println(tableHeader(this.nameWidth, this.missingWidth));
+        this.cw.println(line);
+    }
+
+    onSummary(node, context) {
+        const nodeDepth = depthFor(node);
+        const row = tableRow(
+            node,
+            context,
+            this.cw.colorize.bind(this.cw),
+            this.nameWidth,
+            nodeDepth,
+            this.skipEmpty,
+            this.skipFull,
+            this.missingWidth
+        );
+        if (row) {
+            this.cw.println(row);
+        }
+    }
+
+    onDetail(node, context) {
+        return this.onSummary(node, context);
+    }
+
+    onEnd() {
+        this.cw.println(makeLine(this.nameWidth, this.missingWidth));
+        this.cw.close();
+    }
+}
+
+module.exports = TextReport;
-- 
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