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  		key: "notDeepEqual",
  		value: function notDeepEqual(actual, expected, message) {
  			this.pushResult({
  				result: !equiv(actual, expected),
  				actual: actual,
  				expected: expected,
  				message: message,
  				negative: true
  			});
  		}
  	}, {
  		key: "strictEqual",
  		value: function strictEqual(actual, expected, message) {
  			this.pushResult({
  				result: expected === actual,
  				actual: actual,
  				expected: expected,
  				message: message
  			});
  		}
  	}, {
  		key: "notStrictEqual",
  		value: function notStrictEqual(actual, expected, message) {
  			this.pushResult({
  				result: expected !== actual,
  				actual: actual,
  				expected: expected,
  				message: message,
  				negative: true
  			});
  		}
  	}, {
  		key: "throws",
  		value: function throws(block, expected, message) {
  			var actual = void 0,
  			    result = false;

  			var currentTest = this instanceof Assert && this.test || config.current;

  			// 'expected' is optional unless doing string comparison
  			if (objectType(expected) === "string") {
  				if (message == null) {
  					message = expected;
  					expected = null;
  				} else {
  					throw new Error("throws/raises does not accept a string value for the expected argument.\n" + "Use a non-string object value (e.g. regExp) instead if it's necessary.");
  				}
  			}

  			currentTest.ignoreGlobalErrors = true;
  			try {
  				block.call(currentTest.testEnvironment);
  			} catch (e) {
  				actual = e;
  			}
  			currentTest.ignoreGlobalErrors = false;

  			if (actual) {
  				var expectedType = objectType(expected);

  				// We don't want to validate thrown error
  				if (!expected) {
  					result = true;
  					expected = null;

  					// Expected is a regexp
  				} else if (expectedType === "regexp") {
  					result = expected.test(errorString(actual));

  					// Expected is a constructor, maybe an Error constructor
  				} else if (expectedType === "function" && actual instanceof expected) {
  					result = true;

  					// Expected is an Error object
  				} else if (expectedType === "object") {
  					result = actual instanceof expected.constructor && actual.name === expected.name && actual.message === expected.message;

  					// Expected is a validation function which returns true if validation passed
  				} else if (expectedType === "function" && expected.call({}, actual) === true) {
  					expected = null;
  					result = true;
  				}
  			}

  			currentTest.assert.pushResult({
  				result: result,
  				actual: actual,
  				expected: expected,
  				message: message
  			});
  		}
  	}]);
  	return Assert;
  }();

  // Provide an alternative to assert.throws(), for environments that consider throws a reserved word
  // Known to us are: Closure Compiler, Narwhal
  // eslint-disable-next-line dot-notation


  Assert.prototype.raises = Assert.prototype["throws"];

  /**
   * Converts an error into a simple string for comparisons.
   *
   * @param {Error} error
   * @return {String}
   */
  function errorString(error) {
  	var resultErrorString = error.toString();

  	if (resultErrorString.substring(0, 7) === "[object") {
  		var name = error.name ? error.name.toString() : "Error";
  		var message = error.message ? error.message.toString() : "";

  		if (name && message) {
  			return name + ": " + message;
  		} else if (name) {
  			return name;
  		} else if (message) {
  			return message;