MD Bookmarks: Enable the delete button in the toolbar overlay

chrome/test/data/webui/md_bookmarks/test_util.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.
 
 /**
  * Replace the current body of the test with a new element.
  * @param {Element} element
  */
 function replaceBody(element) {
   PolymerTest.clearBody();
@@ skipping 118 matching lines @@
   var node;
   while (nodes.length) {
     node = nodes.pop();
     if (node.itemId == id)
       return node;
 
     node.root.querySelectorAll('bookmarks-folder-node')
         .forEach((x) => {nodes.unshift(x)});
   }
 }
+
+/**
+ * Creates and returns a CommandManager which tracks what commands are executed.
+ * @constructor
+ * @extends {bookmarks.CommandManager}
+ */
+function TestCommandManager() {

[calamity, 2017/05/23 03:42:55]

Yeah, probably best to have this pulled out a la TestStore.

[tsergeant, 2017/05/23 04:11:36]

Done.

+  var commandManager = document.createElement('bookmarks-command-manager');
+  var lastCommand = null;
+  var lastCommandIds = null;
+
+  var realHandle = commandManager.handle.bind(commandManager);
+  commandManager.handle = function(command, itemIds) {
+    lastCommand = command;
+    lastCommandIds = itemIds;
+    realHandle(command, itemIds);
+  };
+
+  commandManager.assertLastCommand = function (command, ids) {
+    assertEquals(lastCommand, command);
+    if (ids)
+      assertDeepEquals(normalizeSet(lastCommandIds), ids);
+    lastCommand = null;
+    lastCommandIds = null;
+  };
+
+  return commandManager;
+}