Implement should().beRejectedWith()

third_party/WebKit/LayoutTests/webaudio/resources/audit.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 /**
  * @fileOverview  WebAudio layout test utility library. Built around W3C's
  *                testharness.js. Includes asynchronous test task manager,
  *                assertion utilities.
  * @dependency    testharness.js
@@ skipping 339 matching lines @@
     beRejected () {
       return this._actual.then(function () {
           this._assert(false, null, '${actual} resolved incorrectly.');
         }.bind(this), function (error) {
           this._assert(true,
               '${actual} rejected correctly with ' + error + '.', null);
         }.bind(this));
     }
 
     /**
+     * Check if |actual| promise is rejected correctly.
+     *
+     * @example
+     *   should('My promise', promise).beRejectedWith('_ERROR_').then();

[Raymond Toy, 2017/01/23 23:11:57]

This is backward, right? |promise| should be the first arg. (beRejected and
beResolved have this issue, I think.  Not relevant to this CL, though.)

[hongchan, 2017/01/23 23:14:50]

Done.

+     *
+     * @result
+     *   "PASS   My promise rejected correctly with _ERROR_."
+     *   "FAIL X My promise rejected correctly but got _ACTUAL_ERROR instead of
+     *           _EXPECTED_ERROR_."
+     *   "FAIL X My promise resolved incorrectly."
+     */
+    beRejectedWith() {
+      this._processArguments(arguments);
+
+      return this._actual.then(
+          function() {
+            this._assert(false, null, '${actual} resolved incorrectly.');
+          }.bind(this),
+          function(error) {
+            if (this._expected !== error.name) {
+              this._assert(
+                  false, null, '${actual} rejected correctly but got ' +
+                      error.name + ' instead of ' + this._expected + '.');
+            } else {
+              this._assert(
+                  true,
+                  '${actual} rejected correctly with ' + this._expected + '.',
+                  null);
+            }
+          }.bind(this));
+    }
+
+    /**
      * Check if |actual| is a boolean true.
      *
      * @example
      *   should(3 < 5, '3 < 5').beTrue();
      *
      * @result
      *   "PASS   3 < 5 is true."
      */
     beTrue () {
       return this._assert(
@@ skipping 701 matching lines @@
         _logError('this test requires the explicit comparison with the '
             + 'expected result when it runs with run-webkit-tests.');
       }
 
       return new TaskRunner();
     }
 
   };
 
 })();