[ios] BubbleViewController and BubbleView stubs.

ios/chrome/browser/ui/bubble_promo/bubble_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/bubble_promo/bubble_view_controller.h"
+#import "ios/chrome/browser/ui/bubble_promo/bubble_configuration.h"

[edchin, 2017/07/07 04:24:10]

Remove this.

[gchatz, 2017/07/07 04:29:11]

bubble_configuration.h was removed.

[helenlyang, 2017/07/07 23:29:16]

Done.

+
+#import <Foundation/Foundation.h>

[edchin, 2017/07/07 04:24:10]

Remove this.

[helenlyang, 2017/07/07 23:29:16]

Done.

+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest_mac.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+

[gchatz, 2017/07/07 04:29:11]

These tests are likely going to do similar set up, so a test fixture would be
appropriate. This doc explains them:
https://github.com/google/googletest/blob/master/googletest/docs/Primer.md

Look at our other unittests to see examples. We already have a variety of test
fixture subclasses that can be used. 

(if you are planning on saving this for a later part of the implementation, then
feel free to ignore this comment)

[helenlyang, 2017/07/07 23:29:16]

Added a stub implementation for now. Is PlatformTest the appropriate
fixture subclass?

[gchatz, 2017/07/08 00:39:48]

Yeah that should be fine.

+// Tests the bubble's intrinsic content size given short text.
+TEST(BubbleViewControllerTest, BubbleSizeShortText) {}
+
+// Tests that the bubble accommodates text that exceeds the maximum bubble width
+// by displaying the text on multiple lines.
+TEST(BubbleViewControllerTest, BubbleSizeMultipleLineText) {}
+
+// Tests that the bubble attaches to the UI element when the layout is flipped
+// for RTL languages.
+TEST(BubbleViewControllerTest, RTL) {}
+
+// Tests that the accessibility label matches the display text.
+TEST(BubbleViewControllerTest, Accessibility) {}