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

7 files changed, 196 insertions, 0 deletions

diff --git a/vanilla/node_modules/stackback/.npmignore b/vanilla/node_modules/stackback/.npmignore
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+node_modules
diff --git a/vanilla/node_modules/stackback/.travis.yml b/vanilla/node_modules/stackback/.travis.yml
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+++ b/vanilla/node_modules/stackback/.travis.yml
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+language: node_js
+node_js:
+    - 0.6
+    - 0.8
diff --git a/vanilla/node_modules/stackback/README.md b/vanilla/node_modules/stackback/README.md
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+# stackback
+
+Returns an array of CallSite objects for a captured stacktrace. Useful if you want to access the frame for an error object.
+
+## use
+
+```javascript
+var stackback = require('stackback');
+
+// error generated from somewhere
+var err = new Error('some sample error');
+
+// stack is an array of CallSite objects
+var stack = stackback(err);
+```
+
+## CallSite object
+
+From the [V8 StackTrace API](https://code.google.com/p/v8/wiki/JavaScriptStackTraceApi)
+
+The structured stack trace is an Array of CallSite objects, each of which represents a stack frame. A CallSite object defines the following methods
+
+getThis: returns the value of this  
+getTypeName: returns the type of this as a string. This is the name of the function stored in the constructor field of this, if available, otherwise the object's [[Class]] internal property.  
+getFunction: returns the current function  
+getFunctionName: returns the name of the current function, typically its name property. If a name property is not available an attempt will be made to try to infer a name from the function's context.  
+getMethodName: returns the name of the property of this or one of its prototypes that holds the current function  
+getFileName: if this function was defined in a script returns the name of the script  
+getLineNumber: if this function was defined in a script returns the current line number  
+getColumnNumber: if this function was defined in a script returns the current column number  
+getEvalOrigin: if this function was created using a call to eval returns a CallSite object representing the location where eval was called  
+isToplevel: is this a toplevel invocation, that is, is this the global object?  
+isEval: does this call take place in code defined by a call to eval?  
+isNative: is this call in native V8 code?  
+isConstructor: is this a constructor call?  
+
+## install
+
+```shell
+npm install stackback
+```
diff --git a/vanilla/node_modules/stackback/formatstack.js b/vanilla/node_modules/stackback/formatstack.js
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+++ b/vanilla/node_modules/stackback/formatstack.js
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+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function FormatStackTrace(error, frames) {
+    var lines = [];
+    try {
+        lines.push(error.toString());
+    } catch (e) {
+        try {
+            lines.push("<error: " + e + ">");
+        } catch (ee) {
+            lines.push("<error>");
+        }
+    }
+    for (var i = 0; i < frames.length; i++) {
+        var frame = frames[i];
+        var line;
+        try {
+            line = frame.toString();
+        } catch (e) {
+            try {
+                line = "<error: " + e + ">";
+            } catch (ee) {
+                // Any code that reaches this point is seriously nasty!
+                line = "<error>";
+            }
+        }
+        lines.push("    at " + line);
+    }
+    return lines.join("\n");
+}
+
+module.exports = FormatStackTrace;
diff --git a/vanilla/node_modules/stackback/index.js b/vanilla/node_modules/stackback/index.js
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+
+// v8 builtin format stack trace
+// for when there was no previous prepareStackTrace function to call
+var FormatStackTrace = require('./formatstack');
+
+// some notes on the behavior below:
+// because the 'stack' member is a one shot access variable (the raw stack is
+// formatted on accessing it)
+// we try to avoid modifying what the user would have wanted
+// thus we use the previous value for prepareStackTrace
+//
+// The reason we store the callsite variable is because prepareStackTrace
+// will not be called again once it has been called for a given error object
+// but we want to support getting the stack out of the error multiple times (cause why not)
+module.exports = function(err) {
+
+    // save original stacktrace
+    var save = Error.prepareStackTrace;
+
+    // replace capture with our function
+    Error.prepareStackTrace =  function(err, trace) {
+
+        // cache stack frames so we don't have to get them again
+        // use a non-enumerable property
+        Object.defineProperty(err, '_sb_callsites', {
+            value: trace
+        });
+
+        return (save || FormatStackTrace)(err, trace);
+    };
+
+    // force capture of the stack frames
+    err.stack;
+
+    // someone already asked for the stack so we can't do this trick
+    // TODO fallback to string parsing?
+    if (!err._sb_callsites) {
+        return [];
+    }
+
+    // return original capture function
+    Error.prepareStackTrace = save;
+
+    return err._sb_callsites;
+};
+
diff --git a/vanilla/node_modules/stackback/package.json b/vanilla/node_modules/stackback/package.json
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+++ b/vanilla/node_modules/stackback/package.json
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+{
+  "name": "stackback",
+  "version": "0.0.2",
+  "description": "return list of CallSite objects from a captured stacktrace",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha --ui qunit"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/shtylman/node-stackback.git"
+  },
+  "keywords": [
+    "stacktrace",
+    "trace",
+    "stack"
+  ],
+  "devDependencies": {
+    "mocha": "~1.6.0"
+  },
+  "author": "Roman Shtylman <shtylman@gmail.com>",
+  "license": "MIT"
+}
diff --git a/vanilla/node_modules/stackback/test.js b/vanilla/node_modules/stackback/test.js
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+++ b/vanilla/node_modules/stackback/test.js
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+var assert = require('assert');
+var stackback = require('./');
+
+test('capture', function() {
+    var err = new Error();
+    var stack = stackback(err);
+    assert.equal(stack[0].getFileName(), __filename);
+});
+
+// calling stackback on the same error twice should work
+test('multiple calls', function() {
+    var err = new Error();
+    var stack1 = stackback(err);
+    var stack2 = stackback(err);
+    assert.equal(stack1[0].getFileName(), __filename);
+    assert.deepEqual(stack1, stack2);
+});
+
+test('string', function() {
+    var err = new Error();
+    stackback(err);
+    assert.equal(typeof err.stack, 'string');
+});
+