[MD Bookmarks] Double Click

chrome/test/data/webui/md_bookmarks/store_test.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.
 
 suite('<bookmarks-store>', function() {
   var store;
   var TEST_TREE;
 
   function replaceStore() {
     store = document.createElement('bookmarks-store');
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     // Closing an ancestor folder of a selected folder selects the ancestor.
     store.fire('selected-folder-changed', '3');
     store.fire('folder-open-changed', {id: '1', open: false});
     assertFalse(store.idToNodeMap_['1'].isOpen);
     assertEquals('1', store.selectedId);
     assertTrue(store.idToNodeMap_['1'].isSelectedFolder);
     assertFalse(store.idToNodeMap_['3'].isSelectedFolder);
   });
 
+  test('parent folder opens when descendant folder is selected', function() {
+    store.idToNodeMap_['0'].isOpen = false;
+    store.idToNodeMap_['1'].isOpen = false;
+    store.idToNodeMap_['3'].isOpen = false;
+    store.fire('selected-folder-changed', '3');
+    assertTrue(store.idToNodeMap_['0'].isOpen);
+    assertTrue(store.idToNodeMap_['1'].isOpen);
+    assertFalse(store.idToNodeMap_['3'].isOpen);
+  });
+
   test('deleting a node updates the tree', function() {
     removeChild(TEST_TREE, 1);
     overrideBookmarksGetSubTree([TEST_TREE]);
     // Remove an empty folder/bookmark.
     store.onBookmarkRemoved_('4', {parentId: '0', index: 1});
 
     // Check the tree is correct.
     assertEquals('5', store.rootNode.children[1].id);
 
     // idToNodeMap_ has been updated.
@@ skipping 319 matching lines @@
     store.fire(
         'select-item', {item: store.displayedList[2], add: true, range: false});
     store.fire(
         'select-item', {item: store.displayedList[4], add: true, range: true});
     assertDeepEquals(
         [true, false, true, true, true],
         store.displayedList.map(i => i.isSelectedItem));
     assertEquals(2, store.anchorIndex_);
   });
 });