Use the Official ECMAScript Conformance Test Suite (test262) to test …

…the compatibility with the built-in Date constructor.

Current results: 319/449 passes for timezoned-date, 425/449 for built-in Date (Node v4.1.0, Windows 7 x64)

.gitignore

@@ -1,2 +1,4 @@
 /node_modules/
 /lib/
+/test262/test262/
+/test262/prelude.js

.npmignore

@@ -3,3 +3,5 @@
 .gitignore
 .eslintrc
 .editorconfig
+.npmignore
+/test262/

package.json

@@ -23,12 +23,17 @@
     "babel-eslint": "^4.1.3",
     "eslint": "^1.5.0",
     "jshint": "~1.1.0",
-    "mocha": "~1.9.0"
+    "mocha": "~1.9.0",
+    "test262-harness": "^1.5.5"
   },
   "scripts": {
     "lint": "eslint src --fix",
     "test": "mocha",
+    "pretest262": "find test262/test262 -maxdepth 0 || git clone https://github.com/tc39/test262.git test262/test262 --depth 1",
+    "test262": "cat test262/prelude.prefix lib/index.js test262/prelude.suffix > test262/prelude.js && test262-harness --prelude test262/prelude.js \"test262/test262/test/built-ins/Date/**/*.js\"",
+    "pretest262native": "find test262/test262 -maxdepth 0 || git clone https://github.com/tc39/test262.git test262/test262 --depth 1",
+    "test262native": "test262-harness \"test262/test262/test/built-ins/Date/**/*.js\"",
     "build": "babel --optional es7.classProperties src --out-dir lib",
     "watch": "babel --optional es7.classProperties src --watch --out-dir lib"
   }
-}
+}

test262/prelude.prefix

@@ -0,0 +1,4 @@
+var module = {
+    exports: {}
+};
+(function(global, module, exports) {

test262/prelude.suffix

@@ -0,0 +1,3 @@
+})(this, module, module.exports);
+
+Date = module.exports.makeConstructor();