ios/chrome/browser/ui/bubble/bubble_view_unittest.mm - chromium/src - Git at Google

 // Copyright 2017 The Chromium Authors
 // 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/bubble_view.h"

 #import "base/apple/foundation_util.h"
 #import "base/ios/ios_util.h"
 #import "ios/chrome/browser/ui/bubble/bubble_unittest_util.h"
 #import "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #import "testing/platform_test.h"

 @interface BubbleViewDelegateTest : NSObject <BubbleViewDelegate>

 - (instancetype)init;

 @property(nonatomic) int tapCounter;

 @end

 @implementation BubbleViewDelegateTest

 - (instancetype)init {
   self = [super init];
   if (self) {
     _tapCounter = 0;
   }
   return self;
 }

 - (void)didTapCloseButton {
   _tapCounter += 1;
 }

 - (void)didTapSnoozeButton {
   _tapCounter += 1;
 }

 @end

 // Fixture to test BubbleView.
 class BubbleViewTest : public PlatformTest {
  public:
   BubbleViewTest()
       : maxSize_(CGSizeMake(500.0f, 500.0f)),
         arrowDirection_(BubbleArrowDirectionUp),
         alignment_(BubbleAlignmentCenter),
         alignmentOffset_(35.0f),
         shortText_(@"I"),
         longText_(@"Lorem ipsum dolor sit amet, consectetur adipiscing elit."),
         textAlignment_(NSTextAlignmentNatural) {}

  protected:
   // The maximum size of the bubble.
   const CGSize maxSize_;
   // The direction that the bubble's arrow points.
   const BubbleArrowDirection arrowDirection_;
   // The alignment of the bubble's arrow relative to the rest of the bubble.
   const BubbleAlignment alignment_;
   // Distance between the arrow's centerX and the (leading or trailing) edge of
   // the bubble, depending on the BubbleAlignment. If BubbleAlignment is center,
   // then `alignmentOffset` is ignored.
   const CGFloat alignmentOffset_;
   // Text that is shorter than the minimum line width.
   NSString* shortText_;
   // Text that is longer than the maximum line width. It should wrap onto
   // multiple lines.
   NSString* longText_;
   // Text alignment for bubble's title, text and snooze button.
   NSTextAlignment textAlignment_;
 };

 // Test `sizeThatFits` given short text.
 TEST_F(BubbleViewTest, BubbleSizeShortText) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:shortText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_];
   CGSize bubbleSize = [bubble sizeThatFits:maxSize_];
   // Since the label is shorter than the minimum line width, expect the bubble
   // to be the minimum width and accommodate one line of text.
   EXPECT_NEAR(68.0f, bubbleSize.width, 1.0f);
   EXPECT_NEAR(67.0f, bubbleSize.height, 1.0f);
 }

 // Test that the accessibility label matches the display text.
 TEST_F(BubbleViewTest, Accessibility) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   // Add the bubble view to the view hierarchy.
   [superview addSubview:bubble];
   EXPECT_NSEQ(longText_, bubble.accessibilityValue);
 }

 // Tests that the close button is not showed when the option is set to hidden.
 TEST_F(BubbleViewTest, CloseButtonIsNotPresent) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:nil
                                                   image:nil
                                       showsSnoozeButton:NO
                                           textAlignment:textAlignment_
                                                delegate:nil];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIButton* closeButton = GetCloseButtonFromBubbleView(bubble);
   ASSERT_FALSE(closeButton);
 }

 // Tests the close button action and its presence.
 TEST_F(BubbleViewTest, CloseButtonActionAndPresent) {
   BubbleViewDelegateTest* delegate = [[BubbleViewDelegateTest alloc] init];
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:YES
                                                   title:nil
                                                   image:nil
                                       showsSnoozeButton:NO
                                           textAlignment:textAlignment_
                                                delegate:delegate];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIButton* closeButton = GetCloseButtonFromBubbleView(bubble);
   ASSERT_TRUE(closeButton);
   // Tests close button action.
   [closeButton sendActionsForControlEvents:UIControlEventTouchUpInside];
   EXPECT_EQ(delegate.tapCounter, 1);
 }

 // Tests that the title is not showed when the option is set to hidden.
 TEST_F(BubbleViewTest, TitleIsNotPresent) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
   ASSERT_FALSE(titleLabel);
 }

 // Tests that the title is present and correct.
 TEST_F(BubbleViewTest, TitleIsPresentAndCorrect) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:shortText_
                                                   image:nil
                                       showsSnoozeButton:NO
                                           textAlignment:textAlignment_
                                                delegate:nil];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
   ASSERT_TRUE(titleLabel);
   ASSERT_EQ(titleLabel.text, shortText_);
 }

 // Tests that the title is aligned correctly.
 TEST_F(BubbleViewTest, TitleIsAligned) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:shortText_
                                                   image:nil
                                       showsSnoozeButton:NO
                                           textAlignment:NSTextAlignmentNatural
                                                delegate:nil];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
   ASSERT_TRUE(titleLabel);
   ASSERT_EQ(titleLabel.textAlignment, NSTextAlignmentNatural);
 }

 // Tests that the image is not showed when the image is empty.
 TEST_F(BubbleViewTest, ImageIsNotPresent) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIImageView* imageView = GetImageViewFromBubbleView(bubble);
   ASSERT_FALSE(imageView);
 }

 // Tests that the image is present and correct.
 TEST_F(BubbleViewTest, ImageIsPresentAndCorrect) {
   UIImage* testImage = [[UIImage alloc] init];
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:nil
                                                   image:testImage
                                       showsSnoozeButton:NO
                                           textAlignment:textAlignment_
                                                delegate:nil];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIImageView* imageView = GetImageViewFromBubbleView(bubble);
   ASSERT_TRUE(imageView);
   EXPECT_EQ(imageView.image, testImage);
 }

 // Tests that the snooze button is not showed when the option is set to hidden.
 TEST_F(BubbleViewTest, SnoozeButtonIsNotPresent) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:nil
                                                   image:nil
                                       showsSnoozeButton:NO
                                           textAlignment:textAlignment_
                                                delegate:nil];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIButton* snoozeButton = GetSnoozeButtonFromBubbleView(bubble);
   ASSERT_FALSE(snoozeButton);
 }

 // Tests the snooze button action and its presence.
 TEST_F(BubbleViewTest, SnoozeButtonActionAndPresent) {
   BubbleViewDelegateTest* delegate = [[BubbleViewDelegateTest alloc] init];
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:alignment_
                                        showsCloseButton:NO
                                                   title:nil
                                                   image:nil
                                       showsSnoozeButton:YES
                                           textAlignment:textAlignment_
                                                delegate:delegate];
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   UIButton* snoozeButton = GetSnoozeButtonFromBubbleView(bubble);
   ASSERT_TRUE(snoozeButton);
   // Tests snooze button action.
   [snoozeButton sendActionsForControlEvents:UIControlEventTouchUpInside];
   EXPECT_EQ(delegate.tapCounter, 1);
 }

 // Tests the arrow view is aligned properly with BubbleAlignmentTopOrLeading.
 TEST_F(BubbleViewTest, ArrowViewLeadingAligned) {
   BubbleView* bubble =
       [[BubbleView alloc] initWithText:longText_
                         arrowDirection:arrowDirection_
                              alignment:BubbleAlignmentTopOrLeading];
   bubble.alignmentOffset = alignmentOffset_;
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   [bubble layoutIfNeeded];
   UIView* arrowView = GetArrowViewFromBubbleView(bubble);
   ASSERT_TRUE(arrowView);
   // The center of the arrow must be at a distance of `alignmentOffset_` to the
   // leading edge of the bubble.
   EXPECT_EQ(CGRectGetMidX(arrowView.frame), alignmentOffset_);
 }

 // Tests the arrow view is aligned properly with BubbleAlignmentCenter.
 TEST_F(BubbleViewTest, ArrowViewCenterAligned) {
   BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
                                          arrowDirection:arrowDirection_
                                               alignment:BubbleAlignmentCenter];
   bubble.alignmentOffset = alignmentOffset_;
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   [bubble layoutIfNeeded];
   UIView* arrowView = GetArrowViewFromBubbleView(bubble);
   ASSERT_TRUE(arrowView);
   // `alignmentOffset` should be ignored with BubbleAlignmentCenter.
   EXPECT_EQ(CGRectGetMidX(arrowView.frame), CGRectGetMidX(bubble.frame));
 }

 // Tests the arrow view is aligned properly with
 // BubbleAlignmentBottomOrTrailing.
 TEST_F(BubbleViewTest, ArrowViewTrailingAligned) {
   BubbleView* bubble =
       [[BubbleView alloc] initWithText:longText_
                         arrowDirection:arrowDirection_
                              alignment:BubbleAlignmentBottomOrTrailing];
   bubble.alignmentOffset = alignmentOffset_;
   UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
   [superview addSubview:bubble];
   [bubble layoutIfNeeded];
   UIView* arrowView = GetArrowViewFromBubbleView(bubble);
   ASSERT_TRUE(arrowView);
   // The center of the arrow must be at a distance of `alignmentOffset_` to the
   // trailing edge of the bubble.
   EXPECT_EQ(CGRectGetMidX(arrowView.frame),
             bubble.frame.size.width - alignmentOffset_);
 }
	// Copyright 2017 The Chromium Authors
	// 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/bubble_view.h"

	#import "base/apple/foundation_util.h"
	#import "base/ios/ios_util.h"
	#import "ios/chrome/browser/ui/bubble/bubble_unittest_util.h"
	#import "testing/gtest/include/gtest/gtest.h"
	#import "testing/gtest_mac.h"
	#import "testing/platform_test.h"

	@interface BubbleViewDelegateTest : NSObject <BubbleViewDelegate>

	- (instancetype)init;

	@property(nonatomic) int tapCounter;

	@end

	@implementation BubbleViewDelegateTest

	- (instancetype)init {
	self = [super init];
	if (self) {
	_tapCounter = 0;
	}
	return self;
	}

	- (void)didTapCloseButton {
	_tapCounter += 1;
	}

	- (void)didTapSnoozeButton {
	_tapCounter += 1;
	}

	@end

	// Fixture to test BubbleView.
	class BubbleViewTest : public PlatformTest {
	public:
	BubbleViewTest()
	: maxSize_(CGSizeMake(500.0f, 500.0f)),
	arrowDirection_(BubbleArrowDirectionUp),
	alignment_(BubbleAlignmentCenter),
	alignmentOffset_(35.0f),
	shortText_(@"I"),
	longText_(@"Lorem ipsum dolor sit amet, consectetur adipiscing elit."),
	textAlignment_(NSTextAlignmentNatural) {}

	protected:
	// The maximum size of the bubble.
	const CGSize maxSize_;
	// The direction that the bubble's arrow points.
	const BubbleArrowDirection arrowDirection_;
	// The alignment of the bubble's arrow relative to the rest of the bubble.
	const BubbleAlignment alignment_;
	// Distance between the arrow's centerX and the (leading or trailing) edge of
	// the bubble, depending on the BubbleAlignment. If BubbleAlignment is center,
	// then `alignmentOffset` is ignored.
	const CGFloat alignmentOffset_;
	// Text that is shorter than the minimum line width.
	NSString* shortText_;
	// Text that is longer than the maximum line width. It should wrap onto
	// multiple lines.
	NSString* longText_;
	// Text alignment for bubble's title, text and snooze button.
	NSTextAlignment textAlignment_;
	};

	// Test `sizeThatFits` given short text.
	TEST_F(BubbleViewTest, BubbleSizeShortText) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:shortText_
	arrowDirection:arrowDirection_
	alignment:alignment_];
	CGSize bubbleSize = [bubble sizeThatFits:maxSize_];
	// Since the label is shorter than the minimum line width, expect the bubble
	// to be the minimum width and accommodate one line of text.
	EXPECT_NEAR(68.0f, bubbleSize.width, 1.0f);
	EXPECT_NEAR(67.0f, bubbleSize.height, 1.0f);
	}

	// Test that the accessibility label matches the display text.
	TEST_F(BubbleViewTest, Accessibility) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	// Add the bubble view to the view hierarchy.
	[superview addSubview:bubble];
	EXPECT_NSEQ(longText_, bubble.accessibilityValue);
	}

	// Tests that the close button is not showed when the option is set to hidden.
	TEST_F(BubbleViewTest, CloseButtonIsNotPresent) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:nil
	image:nil
	showsSnoozeButton:NO
	textAlignment:textAlignment_
	delegate:nil];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIButton* closeButton = GetCloseButtonFromBubbleView(bubble);
	ASSERT_FALSE(closeButton);
	}

	// Tests the close button action and its presence.
	TEST_F(BubbleViewTest, CloseButtonActionAndPresent) {
	BubbleViewDelegateTest* delegate = [[BubbleViewDelegateTest alloc] init];
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:YES
	title:nil
	image:nil
	showsSnoozeButton:NO
	textAlignment:textAlignment_
	delegate:delegate];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIButton* closeButton = GetCloseButtonFromBubbleView(bubble);
	ASSERT_TRUE(closeButton);
	// Tests close button action.
	[closeButton sendActionsForControlEvents:UIControlEventTouchUpInside];
	EXPECT_EQ(delegate.tapCounter, 1);
	}

	// Tests that the title is not showed when the option is set to hidden.
	TEST_F(BubbleViewTest, TitleIsNotPresent) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
	ASSERT_FALSE(titleLabel);
	}

	// Tests that the title is present and correct.
	TEST_F(BubbleViewTest, TitleIsPresentAndCorrect) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:shortText_
	image:nil
	showsSnoozeButton:NO
	textAlignment:textAlignment_
	delegate:nil];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
	ASSERT_TRUE(titleLabel);
	ASSERT_EQ(titleLabel.text, shortText_);
	}

	// Tests that the title is aligned correctly.
	TEST_F(BubbleViewTest, TitleIsAligned) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:shortText_
	image:nil
	showsSnoozeButton:NO
	textAlignment:NSTextAlignmentNatural
	delegate:nil];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UILabel* titleLabel = GetTitleLabelFromBubbleView(bubble);
	ASSERT_TRUE(titleLabel);
	ASSERT_EQ(titleLabel.textAlignment, NSTextAlignmentNatural);
	}

	// Tests that the image is not showed when the image is empty.
	TEST_F(BubbleViewTest, ImageIsNotPresent) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIImageView* imageView = GetImageViewFromBubbleView(bubble);
	ASSERT_FALSE(imageView);
	}

	// Tests that the image is present and correct.
	TEST_F(BubbleViewTest, ImageIsPresentAndCorrect) {
	UIImage* testImage = [[UIImage alloc] init];
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:nil
	image:testImage
	showsSnoozeButton:NO
	textAlignment:textAlignment_
	delegate:nil];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIImageView* imageView = GetImageViewFromBubbleView(bubble);
	ASSERT_TRUE(imageView);
	EXPECT_EQ(imageView.image, testImage);
	}

	// Tests that the snooze button is not showed when the option is set to hidden.
	TEST_F(BubbleViewTest, SnoozeButtonIsNotPresent) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:nil
	image:nil
	showsSnoozeButton:NO
	textAlignment:textAlignment_
	delegate:nil];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIButton* snoozeButton = GetSnoozeButtonFromBubbleView(bubble);
	ASSERT_FALSE(snoozeButton);
	}

	// Tests the snooze button action and its presence.
	TEST_F(BubbleViewTest, SnoozeButtonActionAndPresent) {
	BubbleViewDelegateTest* delegate = [[BubbleViewDelegateTest alloc] init];
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:alignment_
	showsCloseButton:NO
	title:nil
	image:nil
	showsSnoozeButton:YES
	textAlignment:textAlignment_
	delegate:delegate];
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	UIButton* snoozeButton = GetSnoozeButtonFromBubbleView(bubble);
	ASSERT_TRUE(snoozeButton);
	// Tests snooze button action.
	[snoozeButton sendActionsForControlEvents:UIControlEventTouchUpInside];
	EXPECT_EQ(delegate.tapCounter, 1);
	}

	// Tests the arrow view is aligned properly with BubbleAlignmentTopOrLeading.
	TEST_F(BubbleViewTest, ArrowViewLeadingAligned) {
	BubbleView* bubble =
	[[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:BubbleAlignmentTopOrLeading];
	bubble.alignmentOffset = alignmentOffset_;
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	[bubble layoutIfNeeded];
	UIView* arrowView = GetArrowViewFromBubbleView(bubble);
	ASSERT_TRUE(arrowView);
	// The center of the arrow must be at a distance of `alignmentOffset_` to the
	// leading edge of the bubble.
	EXPECT_EQ(CGRectGetMidX(arrowView.frame), alignmentOffset_);
	}

	// Tests the arrow view is aligned properly with BubbleAlignmentCenter.
	TEST_F(BubbleViewTest, ArrowViewCenterAligned) {
	BubbleView* bubble = [[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:BubbleAlignmentCenter];
	bubble.alignmentOffset = alignmentOffset_;
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	[bubble layoutIfNeeded];
	UIView* arrowView = GetArrowViewFromBubbleView(bubble);
	ASSERT_TRUE(arrowView);
	// `alignmentOffset` should be ignored with BubbleAlignmentCenter.
	EXPECT_EQ(CGRectGetMidX(arrowView.frame), CGRectGetMidX(bubble.frame));
	}

	// Tests the arrow view is aligned properly with
	// BubbleAlignmentBottomOrTrailing.
	TEST_F(BubbleViewTest, ArrowViewTrailingAligned) {
	BubbleView* bubble =
	[[BubbleView alloc] initWithText:longText_
	arrowDirection:arrowDirection_
	alignment:BubbleAlignmentBottomOrTrailing];
	bubble.alignmentOffset = alignmentOffset_;
	UIView* superview = [[UIView alloc] initWithFrame:CGRectZero];
	[superview addSubview:bubble];
	[bubble layoutIfNeeded];
	UIView* arrowView = GetArrowViewFromBubbleView(bubble);
	ASSERT_TRUE(arrowView);
	// The center of the arrow must be at a distance of `alignmentOffset_` to the
	// trailing edge of the bubble.
	EXPECT_EQ(CGRectGetMidX(arrowView.frame),
	bubble.frame.size.width - alignmentOffset_);
	}