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ant/tests/proto.js
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proto.js
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			function testCode() {
			// __proto__ in object literals - basic support
			if (!({ __proto__: [] } instanceof Array) \|\| { __proto__: null } instanceof Object) {
			return false;
			}

			// __proto__ in object literals - multiple __proto__ is an error
			try {
			eval('({ __proto__ : [], __proto__: {} })');
			return false;
			} catch (e) {}

			// __proto__ in object literals - not a computed property
			var a = '__proto__';
			if ({ [a]: [] } instanceof Array) {
			return false;
			}

			// __proto__ in object literals - not a shorthand method
			if ({ __proto__() {} } instanceof Function) {
			return false;
			}

			// __proto__ in object literals - not a shorthand property
			var __proto__ = [];
			if ({ __proto__ } instanceof Array) {
			return false;
			}

			// Object.prototype.__proto__ - get prototype
			var A = function () {};
			if (new A().__proto__ !== A.prototype) {
			return false;
			}

			// Object.prototype.__proto__ - set prototype
			var o = {};
			o.__proto__ = Array.prototype;
			if (!(o instanceof Array)) {
			return false;
			}

			// Object.prototype.__proto__ - absent from Object.create(null)
			var o2 = Object.create(null),
			p = {};
			o2.__proto__ = p;
			if (Object.getPrototypeOf(o2) === p) {
			return false;
			}

			// Object.prototype.__proto__ - correct property descriptor
			var desc = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__');
			if (!(desc && 'get' in desc && 'set' in desc && desc.configurable && !desc.enumerable)) {
			return false;
			}

			// Object.prototype.__proto__ - present in hasOwnProperty()
			if (!Object.prototype.hasOwnProperty('__proto__')) {
			return false;
			}

			// Object.prototype.__proto__ - present in Object.getOwnPropertyNames()
			if (Object.getOwnPropertyNames(Object.prototype).indexOf('__proto__') === -1) {
			return false;
			}

			return true;
			}

			try {
			if (testCode()) {
			console.log('kangax-es6/annex-b.__proto__.js: OK');
			} else {
			console.log('kangax-es6/annex-b.__proto__.js: failed');
			}
			} catch (e) {
			console.log('kangax-es6/annex-b.__proto__.js: exception: ' + e);
			}

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