Creates common super class for bookmark handset and tablet view controllers

ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller_unittest.mm

+// 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.
+
+#import "ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h"
+
+#import "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
+#include "ios/chrome/browser/ui/bookmarks/bookmark_ios_unittest.h"
+
+namespace {
+
+using BookmarkHomeViewControllerTest = BookmarkIOSUnitTest;
+
+TEST_F(BookmarkHomeViewControllerTest, LoadBookmarks) {
+  @autoreleasepool {
+    BookmarkHomeViewController* controller = [[BookmarkHomeViewController alloc]
+        initWithLoader:nil
+          browserState:chrome_browser_state_.get()];
+
+    EXPECT_EQ(nil, controller.menuView);
+    EXPECT_EQ(nil, controller.panelView);
+    EXPECT_EQ(nil, controller.folderView);
+
+    [controller view];
+    [controller loadBookmarkViews];
+
+    EXPECT_NE(nil, controller);
+    EXPECT_NE(nil, controller.navigationBar);
+    EXPECT_NE(nil, controller.menuView);
+    EXPECT_NE(nil, controller.panelView);
+    EXPECT_NE(nil, controller.folderView);
+  }
+}
+
+TEST_F(BookmarkHomeViewControllerTest, LoadWaitingView) {
+  @autoreleasepool {
+    BookmarkHomeViewController* controller = [[BookmarkHomeViewController alloc]
+        initWithLoader:nil
+          browserState:chrome_browser_state_.get()];
+
+    EXPECT_TRUE(controller.waitForModelView == nil);
+
+    [controller view];
+    [controller loadWaitingView];
+
+    EXPECT_TRUE(controller != nil);
+    EXPECT_TRUE(controller.waitForModelView != nil);
+  }
+}
+
+}  // namespace