[AudioPlayer] Add test for opening another file from Files.app

chrome/browser/resources/file_manager/background/js/test_util.js

 // Copyright (c) 2013 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.
 
 /**
  * Namespace for test related things.
  */
 var test = test || {};
 
 /**
@@ skipping 93 matching lines @@
           background.appWindows[appId].contentWindow) {
         callback(appId);
         return true;
       }
     }
     return false;
   });
 };
 
 /**
+ * Close the specified window and wait until it closes.

[hirono, 2014/03/04 09:14:13]

nit: Closes

[yoshiki, 2014/03/05 02:24:44]

Done.

+ *
+ * @param {string} appId AppId of window to be closed.
+ * @param {function(boolean)} callback Completion callback with the result. True
+ * if success, false otherwise.
+ */
+test.util.async.closeWindow = function(appId, callback) {
+  if (appId in background.appWindows &&
+      background.appWindows[appId].contentWindow) {
+    background.appWindows[appId].close();
+
+    test.util.repeatUntilTrue_(function() {
+      if (appId in background.appWindows) {
+        return false;
+      } else {
+        callback(true);
+        return true;
+      }
+    });
+  } else {
+    callback(false);
+  }
+};
+
+/**
  * Gets a document in the Files.app's window, including iframes.
  *
  * @param {Window} contentWindow Window to be used.
  * @param {string=} opt_iframeQuery Query for the iframe.
  * @return {Document=} Returns the found document or undefined if not found.
  * @private
  */
 test.util.sync.getDocument_ = function(contentWindow, opt_iframeQuery) {
   if (opt_iframeQuery) {
     var iframe = contentWindow.document.querySelector(opt_iframeQuery);
@@ skipping 782 matching lines @@
       return false;
     } else {
       console.error('Invalid function name.');
       return false;
     }
   });
 };
 
 // Register the test utils.
 test.util.registerRemoteTestUtils();