MD Bookmarks: Allow 'complex' actions to access the page state directly

chrome/test/data/webui/md_bookmarks/complex_actions_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.
+
+/**
+ * @fileoverview Test suite for action creators that depend on the page state
+ * and have non-trivial logic.
+ */
+
+suite('selectItem', function() {
+  var store;
+  var action;
+
+  setup(function() {
+    store = new bookmarks.TestStore({
+      nodes: testTree(createFolder(
+          '1',
+          [
+            createItem('2'),
+            createItem('8'),
+            createFolder('4', []),
+            createItem('6'),
+          ])),
+      selectedFolder: '1',
+    });
+    bookmarks.Store.instance_ = store;
+  });
+
+  test('can select single item', function() {
+    action = bookmarks.actions.selectItem('2', true, false);
+    var expected = {
+      name: 'select-items',
+      items: ['2'],
+      add: true,
+      anchor: '2',
+    };
+    assertDeepEquals(expected, action);
+  });
+
+  test('can shift-select in regular list', function() {
+    store.data.selection.anchor = '2';
+    action = bookmarks.actions.selectItem('4', false, true);
+
+    assertDeepEquals(['2', '8', '4'], action.items);
+    assertDeepEquals('4', action.anchor);
+  });
+
+  test('can shift-select in search results', function() {
+    store.data.selectedFolder = null;
+    store.data.search = {
+      term: 'test',
+      results: ['1', '4', '8'],
+      inProgress: false,
+    };
+    store.data.selection.anchor = '8';
+
+    action = bookmarks.actions.selectItem('4', false, true);
+
+    assertDeepEquals(['4', '8'], action.items);
+  });
+
+  test('selects the item when the anchor is missing', function() {
+    // Anchor hasn't been set yet.
+    store.data.selection.anchor = null;
+
+    action = bookmarks.actions.selectItem('4', true, true);
+    assertEquals('4', action.anchor);
+    assertDeepEquals(['4'], action.items);
+
+    // Anchor set to an item which doesn't exist.
+    store.data.selection.anchor = '42';
+
+    action = bookmarks.actions.selectItem('8', true, true);
+    assertEquals('8', action.anchor);
+    assertDeepEquals(['8'], action.items);
+  });
+});