MD Bookmarks: Support policies for disabling bookmark editing

chrome/test/data/webui/md_bookmarks/command_manager_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('<bookmarks-command-manager>', function() {
   var commandManager;
   var store;
   var lastCommand;
   var lastCommandIds;
 
@@ skipping 12 matching lines @@
               [
                 createFolder(
                     '11',
                     [
                       createItem('111', {url: 'http://111/'}),
                     ]),
                 createFolder(
                     '12',
                     [
                       createItem('121', {url: 'http://121/'}),
+                      createFolder(
+                          '122',
+                          [
+                            createItem('1221'),
+                          ]),
                     ]),
                 createItem('13', {url: 'http://13/'}),
               ]),
           createFolder(
               '2',
               [
                 createFolder('21', []),
               ]))
     });
     store.replaceSingleton();
@@ skipping 86 matching lines @@
         document.body, '', redoModifier, redoKey);
     commandManager.assertLastCommand('redo');
   });
 
   test('does not delete children at same time as ancestor', function() {
     var lastDelete = null;
     chrome.bookmarkManagerPrivate.removeTrees = function(idArray) {
       lastDelete = idArray.sort();
     };
 
-    var parentAndChildren = new Set(['1', '2', '12', '111']);
+    var parentAndChildren = new Set(['11', '12', '111', '1221']);
     assertTrue(commandManager.canExecute(Command.DELETE, parentAndChildren));
     commandManager.handle(Command.DELETE, parentAndChildren);
 
-    assertDeepEquals(['1', '2'], lastDelete);
+    assertDeepEquals(['11', '12'], lastDelete);
   });
 
   test('expandUrls_ expands one level of URLs', function() {
     var urls = commandManager.expandUrls_(new Set(['1']));
     assertDeepEquals(['http://13/'], urls);
 
     urls = commandManager.expandUrls_(new Set(['11', '12', '13']));
     assertDeepEquals(['http://111/', 'http://121/', 'http://13/'], urls);
   });
 
@@ skipping 26 matching lines @@
 
     assertTrue(commandItem[Command.OPEN_NEW_TAB].disabled);
     assertFalse(commandItem[Command.OPEN_NEW_TAB].hidden);
 
     assertTrue(commandItem[Command.OPEN_NEW_WINDOW].disabled);
     assertFalse(commandItem[Command.OPEN_NEW_WINDOW].hidden);
 
     assertTrue(commandItem[Command.OPEN_INCOGNITO].disabled);
     assertFalse(commandItem[Command.OPEN_INCOGNITO].hidden);
   });
+
+  test('cannot execute editing commands when editing is disabled', function() {
+    var items = new Set(['12']);
+
+    store.data.prefs.canEdit = false;
+    store.data.selection.items = items;
+    store.notifyObservers();
+
+    assertFalse(commandManager.canExecute(Command.EDIT, items));
+    assertFalse(commandManager.canExecute(Command.DELETE, items));
+    assertFalse(commandManager.canExecute(Command.UNDO, items));
+    assertFalse(commandManager.canExecute(Command.REDO, items));
+
+    // No divider line should be visible when only 'Open' commands are enabled.
+    commandManager.openCommandMenuAtPosition(0, 0);
+    commandManager.root.querySelectorAll('hr').forEach(element => {
+      assertTrue(element.hidden);
+    });
+  });
+
+  test('cannot edit unmodifiable nodes', function() {
+    // Cannot edit root folders.
+    var items = new Set(['1']);
+    assertFalse(commandManager.canExecute(Command.EDIT, items));
+    assertFalse(commandManager.canExecute(Command.DELETE, items));
+
+    store.data.nodes['12'].unmodifiable = 'managed';
+    store.notifyObservers();
+
+    items = new Set(['12']);
+    assertFalse(commandManager.canExecute(Command.EDIT, items));
+    assertFalse(commandManager.canExecute(Command.DELETE, items));
+  });
 });
 
 suite('<bookmarks-item> CommandManager integration', function() {
   var list;
   var items;
   var commandManager;
   var openedTabs;
 
   setup(function() {
     store = new bookmarks.TestStore({
@@ skipping 58 matching lines @@
     assertOpenedTabs(['http://111/', 'http://12/']);
   });
 
   test('control-double click opens full selection', function() {
     customClick(items[0]);
     simulateDoubleClick(items[2], {ctrlKey: true});
 
     assertOpenedTabs(['http://111/', 'http://13/']);
   });
 });