Upstream Chrome on iOS source code [1/11].

ios/chrome/app/safe_mode/safe_mode_coordinator_unittest.mm

+// 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.
+
+#import "ios/chrome/app/safe_mode/safe_mode_coordinator.h"
+
+#include <UIKit/UIKit.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "testing/gtest_mac.h"
+
+TEST(SafeModeCoordinatorTest, RootVC) {
+  // Expect that starting a safe mode coordinator will populate the root view
+  // controller.
+  base::scoped_nsobject<UIWindow> window(
+      [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]);
+  EXPECT_TRUE([window rootViewController] == nil);
+  base::scoped_nsobject<SafeModeCoordinator> safe_mode_coordinator(
+      [[SafeModeCoordinator alloc] initWithWindow:window]);
+  [safe_mode_coordinator start];
+  EXPECT_FALSE([window rootViewController] == nil);
+}