feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

4 files changed, 376 insertions, 0 deletions

diff --git a/vanilla/node_modules/css-tree/cjs/generator/create.cjs b/vanilla/node_modules/css-tree/cjs/generator/create.cjs
new file mode 100644
index 0000000..87a54b2
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/generator/create.cjs
@@ -0,0 +1,102 @@
+'use strict';
+
+const index = require('../tokenizer/index.cjs');
+const sourceMap = require('./sourceMap.cjs');
+const tokenBefore = require('./token-before.cjs');
+const types = require('../tokenizer/types.cjs');
+
+const REVERSESOLIDUS = 0x005c; // U+005C REVERSE SOLIDUS (\)
+
+function processChildren(node, delimeter) {
+    if (typeof delimeter === 'function') {
+        let prev = null;
+
+        node.children.forEach(node => {
+            if (prev !== null) {
+                delimeter.call(this, prev);
+            }
+
+            this.node(node);
+            prev = node;
+        });
+
+        return;
+    }
+
+    node.children.forEach(this.node, this);
+}
+
+function processChunk(chunk) {
+    index.tokenize(chunk, (type, start, end) => {
+        this.token(type, chunk.slice(start, end));
+    });
+}
+
+function createGenerator(config) {
+    const types$1 = new Map();
+
+    for (let [name, item] of Object.entries(config.node)) {
+        const fn = item.generate || item;
+
+        if (typeof fn === 'function') {
+            types$1.set(name, item.generate || item);
+        }
+    }
+
+    return function(node, options) {
+        let buffer = '';
+        let prevCode = 0;
+        let handlers = {
+            node(node) {
+                if (types$1.has(node.type)) {
+                    types$1.get(node.type).call(publicApi, node);
+                } else {
+                    throw new Error('Unknown node type: ' + node.type);
+                }
+            },
+            tokenBefore: tokenBefore.safe,
+            token(type, value) {
+                prevCode = this.tokenBefore(prevCode, type, value);
+
+                this.emit(value, type, false);
+
+                if (type === types.Delim && value.charCodeAt(0) === REVERSESOLIDUS) {
+                    this.emit('\n', types.WhiteSpace, true);
+                }
+            },
+            emit(value) {
+                buffer += value;
+            },
+            result() {
+                return buffer;
+            }
+        };
+
+        if (options) {
+            if (typeof options.decorator === 'function') {
+                handlers = options.decorator(handlers);
+            }
+
+            if (options.sourceMap) {
+                handlers = sourceMap.generateSourceMap(handlers);
+            }
+
+            if (options.mode in tokenBefore) {
+                handlers.tokenBefore = tokenBefore[options.mode];
+            }
+        }
+
+        const publicApi = {
+            node: (node) => handlers.node(node),
+            children: processChildren,
+            token: (type, value) => handlers.token(type, value),
+            tokenize: processChunk
+        };
+
+        handlers.node(node);
+
+        return handlers.result();
+    };
+}
+
+exports.createGenerator = createGenerator;
diff --git a/vanilla/node_modules/css-tree/cjs/generator/index.cjs b/vanilla/node_modules/css-tree/cjs/generator/index.cjs
new file mode 100644
index 0000000..5c87cd3
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/generator/index.cjs
@@ -0,0 +1,8 @@
+'use strict';
+
+const create = require('./create.cjs');
+const generator = require('../syntax/config/generator.cjs');
+
+const index = create.createGenerator(generator);
+
+module.exports = index;
diff --git a/vanilla/node_modules/css-tree/cjs/generator/sourceMap.cjs b/vanilla/node_modules/css-tree/cjs/generator/sourceMap.cjs
new file mode 100644
index 0000000..efbc5b9
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/generator/sourceMap.cjs
@@ -0,0 +1,96 @@
+'use strict';
+
+const sourceMapGenerator_js = require('source-map-js/lib/source-map-generator.js');
+
+const trackNodes = new Set(['Atrule', 'Selector', 'Declaration']);
+
+function generateSourceMap(handlers) {
+    const map = new sourceMapGenerator_js.SourceMapGenerator();
+    const generated = {
+        line: 1,
+        column: 0
+    };
+    const original = {
+        line: 0, // should be zero to add first mapping
+        column: 0
+    };
+    const activatedGenerated = {
+        line: 1,
+        column: 0
+    };
+    const activatedMapping = {
+        generated: activatedGenerated
+    };
+    let line = 1;
+    let column = 0;
+    let sourceMappingActive = false;
+
+    const origHandlersNode = handlers.node;
+    handlers.node = function(node) {
+        if (node.loc && node.loc.start && trackNodes.has(node.type)) {
+            const nodeLine = node.loc.start.line;
+            const nodeColumn = node.loc.start.column - 1;
+
+            if (original.line !== nodeLine ||
+                original.column !== nodeColumn) {
+                original.line = nodeLine;
+                original.column = nodeColumn;
+
+                generated.line = line;
+                generated.column = column;
+
+                if (sourceMappingActive) {
+                    sourceMappingActive = false;
+                    if (generated.line !== activatedGenerated.line ||
+                        generated.column !== activatedGenerated.column) {
+                        map.addMapping(activatedMapping);
+                    }
+                }
+
+                sourceMappingActive = true;
+                map.addMapping({
+                    source: node.loc.source,
+                    original,
+                    generated
+                });
+            }
+        }
+
+        origHandlersNode.call(this, node);
+
+        if (sourceMappingActive && trackNodes.has(node.type)) {
+            activatedGenerated.line = line;
+            activatedGenerated.column = column;
+        }
+    };
+
+    const origHandlersEmit = handlers.emit;
+    handlers.emit = function(value, type, auto) {
+        for (let i = 0; i < value.length; i++) {
+            if (value.charCodeAt(i) === 10) { // \n
+                line++;
+                column = 0;
+            } else {
+                column++;
+            }
+        }
+
+        origHandlersEmit(value, type, auto);
+    };
+
+    const origHandlersResult = handlers.result;
+    handlers.result = function() {
+        if (sourceMappingActive) {
+            map.addMapping(activatedMapping);
+        }
+
+        return {
+            css: origHandlersResult(),
+            map
+        };
+    };
+
+    return handlers;
+}
+
+exports.generateSourceMap = generateSourceMap;
diff --git a/vanilla/node_modules/css-tree/cjs/generator/token-before.cjs b/vanilla/node_modules/css-tree/cjs/generator/token-before.cjs
new file mode 100644
index 0000000..87bf4a3
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/generator/token-before.cjs
@@ -0,0 +1,170 @@
+'use strict';
+
+const types = require('../tokenizer/types.cjs');
+
+const PLUSSIGN = 0x002B;    // U+002B PLUS SIGN (+)
+const HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
+
+const code = (type, value) => {
+    if (type === types.Delim) {
+        type = value;
+    }
+
+    if (typeof type === 'string') {
+        const charCode = type.charCodeAt(0);
+        return charCode > 0x7F ? 0x8000 : charCode << 8;
+    }
+
+    return type;
+};
+
+// https://www.w3.org/TR/css-syntax-3/#serialization
+// The only requirement for serialization is that it must "round-trip" with parsing,
+// that is, parsing the stylesheet must produce the same data structures as parsing,
+// serializing, and parsing again, except for consecutive <whitespace-token>s,
+// which may be collapsed into a single token.
+
+const specPairs = [
+    [types.Ident, types.Ident],
+    [types.Ident, types.Function],
+    [types.Ident, types.Url],
+    [types.Ident, types.BadUrl],
+    [types.Ident, '-'],
+    [types.Ident, types.Number],
+    [types.Ident, types.Percentage],
+    [types.Ident, types.Dimension],
+    [types.Ident, types.CDC],
+    [types.Ident, types.LeftParenthesis],
+
+    [types.AtKeyword, types.Ident],
+    [types.AtKeyword, types.Function],
+    [types.AtKeyword, types.Url],
+    [types.AtKeyword, types.BadUrl],
+    [types.AtKeyword, '-'],
+    [types.AtKeyword, types.Number],
+    [types.AtKeyword, types.Percentage],
+    [types.AtKeyword, types.Dimension],
+    [types.AtKeyword, types.CDC],
+
+    [types.Hash, types.Ident],
+    [types.Hash, types.Function],
+    [types.Hash, types.Url],
+    [types.Hash, types.BadUrl],
+    [types.Hash, '-'],
+    [types.Hash, types.Number],
+    [types.Hash, types.Percentage],
+    [types.Hash, types.Dimension],
+    [types.Hash, types.CDC],
+
+    [types.Dimension, types.Ident],
+    [types.Dimension, types.Function],
+    [types.Dimension, types.Url],
+    [types.Dimension, types.BadUrl],
+    [types.Dimension, '-'],
+    [types.Dimension, types.Number],
+    [types.Dimension, types.Percentage],
+    [types.Dimension, types.Dimension],
+    [types.Dimension, types.CDC],
+
+    ['#', types.Ident],
+    ['#', types.Function],
+    ['#', types.Url],
+    ['#', types.BadUrl],
+    ['#', '-'],
+    ['#', types.Number],
+    ['#', types.Percentage],
+    ['#', types.Dimension],
+    ['#', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['-', types.Ident],
+    ['-', types.Function],
+    ['-', types.Url],
+    ['-', types.BadUrl],
+    ['-', '-'],
+    ['-', types.Number],
+    ['-', types.Percentage],
+    ['-', types.Dimension],
+    ['-', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    [types.Number, types.Ident],
+    [types.Number, types.Function],
+    [types.Number, types.Url],
+    [types.Number, types.BadUrl],
+    [types.Number, types.Number],
+    [types.Number, types.Percentage],
+    [types.Number, types.Dimension],
+    [types.Number, '%'],
+    [types.Number, types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['@', types.Ident],
+    ['@', types.Function],
+    ['@', types.Url],
+    ['@', types.BadUrl],
+    ['@', '-'],
+    ['@', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['.', types.Number],
+    ['.', types.Percentage],
+    ['.', types.Dimension],
+
+    ['+', types.Number],
+    ['+', types.Percentage],
+    ['+', types.Dimension],
+
+    ['/', '*']
+];
+// validate with scripts/generate-safe
+const safePairs = specPairs.concat([
+    [types.Ident, types.Hash],
+
+    [types.Dimension, types.Hash],
+
+    [types.Hash, types.Hash],
+
+    [types.AtKeyword, types.LeftParenthesis],
+    [types.AtKeyword, types.String],
+    [types.AtKeyword, types.Colon],
+
+    [types.Percentage, types.Percentage],
+    [types.Percentage, types.Dimension],
+    [types.Percentage, types.Function],
+    [types.Percentage, '-'],
+
+    [types.RightParenthesis, types.Ident],
+    [types.RightParenthesis, types.Function],
+    [types.RightParenthesis, types.Percentage],
+    [types.RightParenthesis, types.Dimension],
+    [types.RightParenthesis, types.Hash],
+    [types.RightParenthesis, '-']
+]);
+
+function createMap(pairs) {
+    const isWhiteSpaceRequired = new Set(
+        pairs.map(([prev, next]) => (code(prev) << 16 | code(next)))
+    );
+
+    return function(prevCode, type, value) {
+        const nextCode = code(type, value);
+        const nextCharCode = value.charCodeAt(0);
+        const emitWs =
+            (nextCharCode === HYPHENMINUS &&
+                type !== types.Ident &&
+                type !== types.Function &&
+                type !== types.CDC) ||
+            (nextCharCode === PLUSSIGN)
+                ? isWhiteSpaceRequired.has(prevCode << 16 | nextCharCode << 8)
+                : isWhiteSpaceRequired.has(prevCode << 16 | nextCode);
+
+        if (emitWs) {
+            this.emit(' ', types.WhiteSpace, true);
+        }
+
+        return nextCode;
+    };
+}
+
+const spec = createMap(specPairs);
+const safe = createMap(safePairs);
+
+exports.safe = safe;
+exports.spec = spec;