Print out label and description on task entry in Audit task runner

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 916 matching lines @@
       this._label = taskLabel;
       this._description = '';
       this._state = TaskState.PENDING;
       this._result = true;
 
       this._totalAssertions = 0;
       this._failedAssertions = 0;
     }
 
     // Set the description of this task. This is printed out in the test
-    // result.
+    // result right after the task starts.
     describe (message) {
       this._description = message;
-      _logPassed('> [' + this._label + '] '
-          + this._description);
+      _logPassed('  : ' + this._description);
     }
 
     get state () {
       return this._state;
     }
 
     get result () {
       return this._result;
     }
 
     // Start the assertion chain.
     should (actual, actualDescription) {
       // If no argument is given, we cannot proceed. Halt.
       if (arguments.length === 0)
         _throwException('Task.should:: requires at least 1 argument.');
 
       return new Should(this, actual, actualDescription);
     }
 
     // Run this task. |this| task will be passed into the user-supplied test
     // task function.
     run () {
       this._state = TaskState.STARTED;
+      _logPassed('> [' + this._label + '] task started.');

[Raymond Toy, 2017/02/16 21:50:40]

I think I'd prefer nothing be printed.  Because what you have now is
indistinguishable from a task description of "task started.".  (Granted, you
could also have a description of "", but that seems much less likely.)

[hongchan, 2017/02/16 23:54:49]

If your description is undefined or null, you'll get nothing.

       this._taskFunction(
           this,
           this.should.bind(this));
     }
 
     // Update the task success based on the individual assertion/test inside.
     update (subTask) {
       // After one of tests fails within a task, the result is irreversible.
       if (subTask.result === false) {
         this._result = false;
@@ skipping 152 matching lines @@
         _logError('this test requires the explicit comparison with the '
             + 'expected result when it runs with run-webkit-tests.');
       }
 
       return new TaskRunner();
     }
 
   };
 
 })();