MD Bookmarks: Remove deleted nodes from state tree

chrome/test/data/webui/md_bookmarks/util_test.js

+// Copyright 2017 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('util', function() {
+  test('getDescendants collects all children', function() {
+    var nodes = testTree(createFolder('0', [
+      createFolder('1', []),
+      createFolder(
+          '2',
+          [
+            createItem('3'),
+            createFolder(
+                '4',
+                [
+                  createItem('6'),
+                  createFolder('7', []),
+                ]),
+            createItem('5'),
+          ]),
+    ]));
+
+    function normalizeSet(set) {
+      return Array.from(set).sort();
+    }

[calamity, 2017/04/03 06:54:24]

FYI, I needed this for another patch so I moved it to test_util.js

[tsergeant, 2017/04/04 04:42:28]

Ack, picked up in the rebase

+
+    var descendants = bookmarks.util.getDescendants(nodes, '1');
+    assertDeepEquals(['1'], normalizeSet(descendants));
+
+    descendants = bookmarks.util.getDescendants(nodes, '4');
+    assertDeepEquals(['4', '6', '7'], normalizeSet(descendants));
+
+    descendants = bookmarks.util.getDescendants(nodes, '2');
+    assertDeepEquals(['2', '3', '4', '5', '6', '7'], normalizeSet(descendants));
+
+    descendants = bookmarks.util.getDescendants(nodes, '42');
+    assertDeepEquals([], normalizeSet(descendants));
+  });
+
+  test('removeNodesFromMap', function() {
+    var map = {
+      '1': true,
+      '2': false,
+      '4': true,
+    };
+
+    var nodes = new Set([2, 3, 4]);
+
+    var newMap = bookmarks.util.removeNodesFromMap(map, nodes);
+
+    assertEquals(undefined, newMap['2']);
+    assertEquals(undefined, newMap['4']);
+    assertTrue(newMap['1']);
+
+    // Should not have changed the input map.
+    assertFalse(map['2']);
+  });
+});