[MD Bookmarks] Add skeleton for MD Bookmarks.

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 = {
+    id: '0',
+    children: [
+      {
+        id: '1',
+        children: [
+          {id: '2', url: 'link2'},
+          {id: '3', children: []}
+        ]
+      },
+      {id: '4', url: 'link4'},
+      {id: '5', url: 'link5'}
+    ]
+  };
+
+  setup(function() {
+    store = document.createElement('bookmarks-store');
+    store.isTesting_ = true;
+    replaceBody(store);
+    store.setupStore_(TEST_TREE);
+  });
+
+  test('mapNodes inserts nodes into idToNodeMap', function(){

[tsergeant, 2016/12/28 23:51:50]

mapNodes is now called initNodes

[angelayang, 2016/12/29 02:53:34]

Done.

+    assertEquals(TEST_TREE, store.idToNodeMap_['0']);
+    assertEquals(TEST_TREE.children[0], store.idToNodeMap_['1']);
+    assertEquals(TEST_TREE.children[0].children[0], store.idToNodeMap_['2']);
+    assertEquals(TEST_TREE.children[0].children[1], store.idToNodeMap_['3']);
+    assertEquals(TEST_TREE.children[1], store.idToNodeMap_['4']);
+    assertEquals(TEST_TREE.children[2], store.idToNodeMap_['5']);
+  });
+
+  test('changing selectedId is changing the selectedNode', function(){

[tsergeant, 2016/12/28 23:51:50]

Grammar nit:

changing selectedId changes the selectedNode

[angelayang, 2016/12/29 02:53:34]

Done.

+    store.selectedId = '0';
+    assertEquals(TEST_TREE, store.selectedNode);
+    store.selectedId = '1';
+    assertEquals(TEST_TREE.children[0], store.selectedNode);
+    store.selectedId = '2';
+    assertEquals(TEST_TREE.children[0].children[0], store.selectedNode);
+    store.selectedId = '3';
+    assertEquals(TEST_TREE.children[0].children[1], store.selectedNode);
+    store.selectedId = '4';
+    assertEquals(TEST_TREE.children[1], store.selectedNode);
+    store.selectedId = '5';
+    assertEquals(TEST_TREE.children[2], store.selectedNode);
+  });
+
+  test('correct paths generated for nodes', function() {
+    var TEST_PATHS = {
+      '0': 'rootNode',
+      '1': 'rootNode.children.0',
+      '2': 'rootNode.children.0.children.0',
+      '3': 'rootNode.children.0.children.1',
+      '4': 'rootNode.children.1',
+      '5': 'rootNode.children.2',
+    };
+
+    for (var id in store.idToNodeMap_)
+      assertEquals(TEST_PATHS[id], store.idToNodeMap_[id].path);
+  });
+
+  test('store updates on selected event', function() {
+    // First child of root is selected by default.
+    assertEquals('1', store.selectedId);
+    assertTrue(store.idToNodeMap_['1'].isSelected);
+
+    // Selecting a selected folder doesn't deselect it.
+    store.fire('selected-folder-changed', '1');
+    assertEquals('1', store.selectedId);
+    assertTrue(store.idToNodeMap_['1'].isSelected);
+
+    // Select a deeply nested descendant.
+    store.fire('selected-folder-changed', '3');
+    assertEquals('3', store.selectedId);
+    assertTrue(store.idToNodeMap_['3'].isSelected);
+    assertFalse(store.idToNodeMap_['1'].isSelected);
+
+    // Select a folder in separate subtree.
+    store.fire('selected-folder-changed', '5');
+    assertEquals('5', store.selectedId);
+    assertTrue(store.idToNodeMap_['5'].isSelected);
+    assertFalse(store.idToNodeMap_['3'].isSelected);
+  });
+
+  test('store update on folder open and closed', function() {

[calamity, 2016/12/29 00:54:50]

nit: updates, open and close.

[angelayang, 2016/12/29 02:53:34]

Done.

+    // All folders are open by default.
+    for (var id in store.idToNodeMap_) {
+      if (store.idToNodeMap_[id].url)
+        continue;
+
+      assertTrue(store.idToNodeMap_[id].isOpen);
+    }
+
+    // Closing a folder doesn't close any descendants.
+    store.fire('folder-open-changed', {id: '1', open: false});
+    assertFalse(store.idToNodeMap_['1'].isOpen);
+    assertTrue(store.idToNodeMap_['3'].isOpen);
+    store.fire('folder-open-changed', {id: '1', open: true});
+
+    // 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'].isSelected);
+    assertFalse(store.idToNodeMap_['3'].isSelected);
+  });
+});