ios/chrome/app/application_delegate/metrics_mediator_unittest.mm - chromium/src - Git at Google

 // Copyright 2016 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/app/application_delegate/metrics_mediator.h"

 #import <Foundation/Foundation.h>

 #import "base/test/metrics/histogram_tester.h"
 #import "components/metrics/metrics_service.h"
 #import "components/previous_session_info/previous_session_info.h"
 #import "components/previous_session_info/previous_session_info_private.h"
 #import "ios/chrome/app/app_startup_parameters.h"
 #import "ios/chrome/app/application_delegate/metric_kit_subscriber.h"
 #import "ios/chrome/app/application_delegate/metrics_mediator_testing.h"
 #import "ios/chrome/app/application_delegate/startup_information.h"
 #import "ios/chrome/browser/shared/coordinator/scene/connection_information.h"
 #import "ios/chrome/browser/shared/coordinator/scene/scene_state.h"
 #import "ios/chrome/browser/shared/coordinator/scene/test/fake_scene_state.h"
 #import "ios/chrome/browser/shared/model/browser/browser_provider_interface.h"
 #import "ios/chrome/browser/shared/model/browser/test/test_browser.h"
 #import "ios/chrome/browser/shared/model/profile/test/test_profile_ios.h"
 #import "ios/chrome/browser/shared/model/url/chrome_url_constants.h"
 #import "ios/chrome/browser/shared/model/web_state_list/web_state_list.h"
 #import "ios/chrome/browser/shared/model/web_state_list/web_state_opener.h"
 #import "ios/chrome/common/app_group/app_group_metrics.h"
 #import "ios/chrome/test/ios_chrome_scoped_testing_local_state.h"
 #import "ios/testing/scoped_block_swizzler.h"
 #import "ios/web/public/test/web_task_environment.h"
 #import "net/base/network_change_notifier.h"
 #import "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 #import "third_party/ocmock/gtest_support.h"

 // Mock class for testing MetricsMediator.
 @interface MetricsMediatorMock : MetricsMediator
 @property(nonatomic) NSInteger reportingValue;
 - (void)reset;
 @end

 @implementation MetricsMediatorMock
 @synthesize reportingValue = _reportingValue;

 - (void)reset {
   _reportingValue = -1;
 }
 - (void)setReporting:(BOOL)enableReporting {
   _reportingValue = enableReporting ? 1 : 0;
 }
 - (BOOL)areMetricsEnabled {
   return YES;
 }

 @end

 using MetricsMediatorTest = PlatformTest;

 // Tests that histograms logged in a widget are correctly re-emitted by Chrome.
 TEST_F(MetricsMediatorTest, WidgetHistogramMetricsRecorded) {
   using app_group::HistogramCountKey;

   base::HistogramTester tester;
   NSString* histogram = @"MyHistogram";

   // Simulate 1 event fired in bucket 0, and 2 events fired in bucket 2.
   NSString* keyBucket0 = HistogramCountKey(histogram, 0);
   NSString* keyBucket1 = HistogramCountKey(histogram, 1);
   NSString* keyBucket2 = HistogramCountKey(histogram, 2);

   NSUserDefaults* sharedDefaults = app_group::GetGroupUserDefaults();
   [sharedDefaults setInteger:1 forKey:keyBucket0];
   [sharedDefaults setInteger:2 forKey:keyBucket2];

   const metrics_mediator::HistogramNameCountPair histograms[] = {
       {
           histogram,
           // 3 buckets, to make sure that the first and last buckets are logged.
           3,
       },
   };

   metrics_mediator::RecordWidgetUsage(histograms);

   // Verify that the correct events were emitted.
   tester.ExpectBucketCount("MyHistogram", 0, 1);
   tester.ExpectBucketCount("MyHistogram", 1, 0);
   tester.ExpectBucketCount("MyHistogram", 2, 2);

   // Verify that all entries in NSUserDefaults have been removed.
   EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket0]);
   EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket1]);
   EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket2]);
 }

 #pragma mark - logLaunchMetrics tests.

 // A block that takes as arguments the caller and the arguments from
 // UserActivityHandler +handleStartupParameters and returns nothing.
 typedef void (^LogLaunchMetricsBlock)(id, const char*, int);

 class MetricsMediatorLogLaunchTest : public PlatformTest {
  protected:
   MetricsMediatorLogLaunchTest()
       : profile_(TestProfileIOS::Builder().Build()),
         num_tabs_has_been_called_(FALSE),
         num_ntp_tabs_has_been_called_(FALSE),
         num_live_ntp_tabs_has_been_called_(FALSE) {}

   void initiateMetricsMediator(BOOL coldStart, int tabCount) {
     num_tabs_swizzle_block_ = [^(id self, int numTab) {
       num_tabs_has_been_called_ = YES;
       // Tests.
       EXPECT_EQ(tabCount, numTab);
     } copy];
     num_ntp_tabs_swizzle_block_ = [^(id self, int numTab) {
       num_ntp_tabs_has_been_called_ = YES;
       // Tests.
       EXPECT_EQ(tabCount, numTab);
     } copy];
     num_live_ntp_tabs_swizzle_block_ = [^(id self, int numTab) {
       num_live_ntp_tabs_has_been_called_ = YES;
     } copy];
     if (coldStart) {
       tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
           [MetricsMediator class], @selector(recordStartupTabCount:),
           num_tabs_swizzle_block_));
       ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
           [MetricsMediator class], @selector(recordStartupNTPTabCount:),
           num_ntp_tabs_swizzle_block_));
     } else {
       tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
           [MetricsMediator class], @selector(recordResumeTabCount:),
           num_tabs_swizzle_block_));
       ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
           [MetricsMediator class], @selector(recordResumeNTPTabCount:),
           num_ntp_tabs_swizzle_block_));
       live_ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
           [MetricsMediator class], @selector(recordResumeLiveNTPTabCount:),
           num_live_ntp_tabs_swizzle_block_));
     }
   }

   void TearDown() override {
     connected_scenes_ = nil;
     PlatformTest::TearDown();
   }

   void verifySwizzleHasBeenCalled() {
     EXPECT_TRUE(num_tabs_has_been_called_);
     EXPECT_TRUE(num_ntp_tabs_has_been_called_);
   }

   web::WebTaskEnvironment task_environment_;
   IOSChromeScopedTestingLocalState scoped_testing_local_state_;
   std::unique_ptr<TestProfileIOS> profile_;
   NSArray<FakeSceneState*>* connected_scenes_;
   __block BOOL num_tabs_has_been_called_;
   __block BOOL num_ntp_tabs_has_been_called_;
   __block BOOL num_live_ntp_tabs_has_been_called_;
   LogLaunchMetricsBlock num_tabs_swizzle_block_;
   LogLaunchMetricsBlock num_ntp_tabs_swizzle_block_;
   LogLaunchMetricsBlock num_live_ntp_tabs_swizzle_block_;
   std::unique_ptr<ScopedBlockSwizzler> tabs_uma_histogram_swizzler_;
   std::unique_ptr<ScopedBlockSwizzler> ntp_tabs_uma_histogram_swizzler_;
   std::unique_ptr<ScopedBlockSwizzler> live_ntp_tabs_uma_histogram_swizzler_;
 };

 // Verifies that the log of the number of open tabs is sent and verifies
 TEST_F(MetricsMediatorLogLaunchTest,
        logLaunchMetricsWithEnteredBackgroundDate) {
   // Setup.
   BOOL coldStart = YES;
   initiateMetricsMediator(coldStart, 23);
   // 23 tabs across three scenes.
   connected_scenes_ = [FakeSceneState sceneArrayWithCount:3
                                                   profile:profile_.get()];
   [connected_scenes_[0] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:9];
   [connected_scenes_[1] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:9];
   [connected_scenes_[2] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:5];
   // Mark one of the scenes as active.
   connected_scenes_[0].activationLevel = SceneActivationLevelForegroundActive;

   const NSTimeInterval kFirstUserActionTimeout = 30.0;

   id startupInformation =
       [OCMockObject niceMockForProtocol:@protocol(StartupInformation)];
   [[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];
   [[startupInformation expect]
       expireFirstUserActionRecorderAfterDelay:kFirstUserActionTimeout];

   [[NSUserDefaults standardUserDefaults]
       setObject:[NSDate date]
          forKey:metrics_mediator::kAppEnteredBackgroundDateKey];

   // Action.
   [MetricsMediator logLaunchMetricsWithStartupInformation:startupInformation
                                           connectedScenes:connected_scenes_];

   // Tests.
   NSDate* dateStored = [[NSUserDefaults standardUserDefaults]
       objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
   EXPECT_EQ(nil, dateStored);
   verifySwizzleHasBeenCalled();
   EXPECT_OCMOCK_VERIFY(startupInformation);
 }

 // Verifies that +logLaunchMetrics logs of the number of open tabs and nothing
 // more if the background date is not set;
 TEST_F(MetricsMediatorLogLaunchTest, logLaunchMetricsNoBackgroundDate) {
   // Setup.
   BOOL coldStart = NO;
   initiateMetricsMediator(coldStart, 32);
   // 32 tabs across five scenes.
   connected_scenes_ = [FakeSceneState sceneArrayWithCount:5
                                                   profile:profile_.get()];
   [connected_scenes_[0] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:8];
   [connected_scenes_[1] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:8];
   // Scene 2 has zero tabs.
   [connected_scenes_[3] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:8];
   [connected_scenes_[4] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
                                          count:8];

   id startupInformation =
       [OCMockObject mockForProtocol:@protocol(StartupInformation)];
   [[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];

   [[NSUserDefaults standardUserDefaults]
       removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

   // Action.
   [MetricsMediator logLaunchMetricsWithStartupInformation:startupInformation
                                           connectedScenes:connected_scenes_];
   // Tests.
   verifySwizzleHasBeenCalled();
   EXPECT_TRUE(num_live_ntp_tabs_has_been_called_);
 }

 using MetricsMediatorNoFixtureTest = PlatformTest;

 // Tests that +logDateInUserDefaults logs the date in UserDefaults.
 TEST_F(MetricsMediatorNoFixtureTest, logDateInUserDefaultsTest) {
   // Setup.
   [[NSUserDefaults standardUserDefaults]
       removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

   NSDate* lastAppClose = [[NSUserDefaults standardUserDefaults]
       objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

   ASSERT_EQ(nil, lastAppClose);

   // Action.
   [MetricsMediator logDateInUserDefaults];

   // Setup.
   lastAppClose = [[NSUserDefaults standardUserDefaults]
       objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
   EXPECT_NE(nil, lastAppClose);
 }

 // Tests that +logStartupDuration: calls
 // +endExtendedLaunchTask on cold start.
 TEST_F(MetricsMediatorNoFixtureTest, endExtendedLaunchTaskOnColdStart) {
   id startupInformation =
       [OCMockObject mockForProtocol:@protocol(StartupInformation)];
   [[[startupInformation stub] andReturnValue:@YES] isColdStart];

   base::TimeTicks time = base::TimeTicks();
   [[[startupInformation stub] andDo:^(NSInvocation* invocation) {
     [invocation setReturnValue:(void*)&time];
   }] appLaunchTime];

   [[[startupInformation stub] andDo:^(NSInvocation* invocation) {
     [invocation setReturnValue:(void*)&time];
   }] didFinishLaunchingTime];

   [[[startupInformation stub] andDo:^(NSInvocation* invocation) {
     [invocation setReturnValue:(void*)&time];
   }] firstSceneConnectionTime];

   id metricKitSubscriber =
       [OCMockObject mockForClass:[MetricKitSubscriber class]];
   [[metricKitSubscriber expect] endExtendedLaunchTask];

   [MetricsMediator logStartupDuration:startupInformation];
   EXPECT_OCMOCK_VERIFY(metricKitSubscriber);
 }

 // Tests that +logStartupDuration: does not call
 // +endExtendedLaunchTask on warm start.
 TEST_F(MetricsMediatorNoFixtureTest, endExtendedLaunchTaskOnWarmStart) {
   id startupInformation =
       [OCMockObject mockForProtocol:@protocol(StartupInformation)];
   [[[startupInformation stub] andReturnValue:@NO] isColdStart];

   id metricKitSubscriber =
       [OCMockObject mockForClass:[MetricKitSubscriber class]];
   [[metricKitSubscriber reject] endExtendedLaunchTask];

   [MetricsMediator logStartupDuration:startupInformation];
   EXPECT_OCMOCK_VERIFY(metricKitSubscriber);
 }
	// Copyright 2016 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/app/application_delegate/metrics_mediator.h"

	#import <Foundation/Foundation.h>

	#import "base/test/metrics/histogram_tester.h"
	#import "components/metrics/metrics_service.h"
	#import "components/previous_session_info/previous_session_info.h"
	#import "components/previous_session_info/previous_session_info_private.h"
	#import "ios/chrome/app/app_startup_parameters.h"
	#import "ios/chrome/app/application_delegate/metric_kit_subscriber.h"
	#import "ios/chrome/app/application_delegate/metrics_mediator_testing.h"
	#import "ios/chrome/app/application_delegate/startup_information.h"
	#import "ios/chrome/browser/shared/coordinator/scene/connection_information.h"
	#import "ios/chrome/browser/shared/coordinator/scene/scene_state.h"
	#import "ios/chrome/browser/shared/coordinator/scene/test/fake_scene_state.h"
	#import "ios/chrome/browser/shared/model/browser/browser_provider_interface.h"
	#import "ios/chrome/browser/shared/model/browser/test/test_browser.h"
	#import "ios/chrome/browser/shared/model/profile/test/test_profile_ios.h"
	#import "ios/chrome/browser/shared/model/url/chrome_url_constants.h"
	#import "ios/chrome/browser/shared/model/web_state_list/web_state_list.h"
	#import "ios/chrome/browser/shared/model/web_state_list/web_state_opener.h"
	#import "ios/chrome/common/app_group/app_group_metrics.h"
	#import "ios/chrome/test/ios_chrome_scoped_testing_local_state.h"
	#import "ios/testing/scoped_block_swizzler.h"
	#import "ios/web/public/test/web_task_environment.h"
	#import "net/base/network_change_notifier.h"
	#import "testing/platform_test.h"
	#import "third_party/ocmock/OCMock/OCMock.h"
	#import "third_party/ocmock/gtest_support.h"

	// Mock class for testing MetricsMediator.
	@interface MetricsMediatorMock : MetricsMediator
	@property(nonatomic) NSInteger reportingValue;
	- (void)reset;
	@end

	@implementation MetricsMediatorMock
	@synthesize reportingValue = _reportingValue;

	- (void)reset {
	_reportingValue = -1;
	}
	- (void)setReporting:(BOOL)enableReporting {
	_reportingValue = enableReporting ? 1 : 0;
	}
	- (BOOL)areMetricsEnabled {
	return YES;
	}

	@end

	using MetricsMediatorTest = PlatformTest;

	// Tests that histograms logged in a widget are correctly re-emitted by Chrome.
	TEST_F(MetricsMediatorTest, WidgetHistogramMetricsRecorded) {
	using app_group::HistogramCountKey;

	base::HistogramTester tester;
	NSString* histogram = @"MyHistogram";

	// Simulate 1 event fired in bucket 0, and 2 events fired in bucket 2.
	NSString* keyBucket0 = HistogramCountKey(histogram, 0);
	NSString* keyBucket1 = HistogramCountKey(histogram, 1);
	NSString* keyBucket2 = HistogramCountKey(histogram, 2);

	NSUserDefaults* sharedDefaults = app_group::GetGroupUserDefaults();
	[sharedDefaults setInteger:1 forKey:keyBucket0];
	[sharedDefaults setInteger:2 forKey:keyBucket2];

	const metrics_mediator::HistogramNameCountPair histograms[] = {
	{
	histogram,
	// 3 buckets, to make sure that the first and last buckets are logged.
	3,
	},
	};

	metrics_mediator::RecordWidgetUsage(histograms);

	// Verify that the correct events were emitted.
	tester.ExpectBucketCount("MyHistogram", 0, 1);
	tester.ExpectBucketCount("MyHistogram", 1, 0);
	tester.ExpectBucketCount("MyHistogram", 2, 2);

	// Verify that all entries in NSUserDefaults have been removed.
	EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket0]);
	EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket1]);
	EXPECT_EQ(0, [sharedDefaults integerForKey:keyBucket2]);
	}

	#pragma mark - logLaunchMetrics tests.

	// A block that takes as arguments the caller and the arguments from
	// UserActivityHandler +handleStartupParameters and returns nothing.
	typedef void (^LogLaunchMetricsBlock)(id, const char*, int);

	class MetricsMediatorLogLaunchTest : public PlatformTest {
	protected:
	MetricsMediatorLogLaunchTest()
	: profile_(TestProfileIOS::Builder().Build()),
	num_tabs_has_been_called_(FALSE),
	num_ntp_tabs_has_been_called_(FALSE),
	num_live_ntp_tabs_has_been_called_(FALSE) {}

	void initiateMetricsMediator(BOOL coldStart, int tabCount) {
	num_tabs_swizzle_block_ = [^(id self, int numTab) {
	num_tabs_has_been_called_ = YES;
	// Tests.
	EXPECT_EQ(tabCount, numTab);
	} copy];
	num_ntp_tabs_swizzle_block_ = [^(id self, int numTab) {
	num_ntp_tabs_has_been_called_ = YES;
	// Tests.
	EXPECT_EQ(tabCount, numTab);
	} copy];
	num_live_ntp_tabs_swizzle_block_ = [^(id self, int numTab) {
	num_live_ntp_tabs_has_been_called_ = YES;
	} copy];
	if (coldStart) {
	tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
	[MetricsMediator class], @selector(recordStartupTabCount:),
	num_tabs_swizzle_block_));
	ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
	[MetricsMediator class], @selector(recordStartupNTPTabCount:),
	num_ntp_tabs_swizzle_block_));
	} else {
	tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
	[MetricsMediator class], @selector(recordResumeTabCount:),
	num_tabs_swizzle_block_));
	ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
	[MetricsMediator class], @selector(recordResumeNTPTabCount:),
	num_ntp_tabs_swizzle_block_));
	live_ntp_tabs_uma_histogram_swizzler_.reset(new ScopedBlockSwizzler(
	[MetricsMediator class], @selector(recordResumeLiveNTPTabCount:),
	num_live_ntp_tabs_swizzle_block_));
	}
	}

	void TearDown() override {
	connected_scenes_ = nil;
	PlatformTest::TearDown();
	}

	void verifySwizzleHasBeenCalled() {
	EXPECT_TRUE(num_tabs_has_been_called_);
	EXPECT_TRUE(num_ntp_tabs_has_been_called_);
	}

	web::WebTaskEnvironment task_environment_;
	IOSChromeScopedTestingLocalState scoped_testing_local_state_;
	std::unique_ptr<TestProfileIOS> profile_;
	NSArray<FakeSceneState> connected_scenes_;
	__block BOOL num_tabs_has_been_called_;
	__block BOOL num_ntp_tabs_has_been_called_;
	__block BOOL num_live_ntp_tabs_has_been_called_;
	LogLaunchMetricsBlock num_tabs_swizzle_block_;
	LogLaunchMetricsBlock num_ntp_tabs_swizzle_block_;
	LogLaunchMetricsBlock num_live_ntp_tabs_swizzle_block_;
	std::unique_ptr<ScopedBlockSwizzler> tabs_uma_histogram_swizzler_;
	std::unique_ptr<ScopedBlockSwizzler> ntp_tabs_uma_histogram_swizzler_;
	std::unique_ptr<ScopedBlockSwizzler> live_ntp_tabs_uma_histogram_swizzler_;
	};

	// Verifies that the log of the number of open tabs is sent and verifies
	TEST_F(MetricsMediatorLogLaunchTest,
	logLaunchMetricsWithEnteredBackgroundDate) {
	// Setup.
	BOOL coldStart = YES;
	initiateMetricsMediator(coldStart, 23);
	// 23 tabs across three scenes.
	connected_scenes_ = [FakeSceneState sceneArrayWithCount:3
	profile:profile_.get()];
	[connected_scenes_[0] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:9];
	[connected_scenes_[1] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:9];
	[connected_scenes_[2] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:5];
	// Mark one of the scenes as active.
	connected_scenes_[0].activationLevel = SceneActivationLevelForegroundActive;

	const NSTimeInterval kFirstUserActionTimeout = 30.0;

	id startupInformation =
	[OCMockObject niceMockForProtocol:@protocol(StartupInformation)];
	[[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];
	[[startupInformation expect]
	expireFirstUserActionRecorderAfterDelay:kFirstUserActionTimeout];

	[[NSUserDefaults standardUserDefaults]
	setObject:[NSDate date]
	forKey:metrics_mediator::kAppEnteredBackgroundDateKey];

	// Action.
	[MetricsMediator logLaunchMetricsWithStartupInformation:startupInformation
	connectedScenes:connected_scenes_];

	// Tests.
	NSDate* dateStored = [[NSUserDefaults standardUserDefaults]
	objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
	EXPECT_EQ(nil, dateStored);
	verifySwizzleHasBeenCalled();
	EXPECT_OCMOCK_VERIFY(startupInformation);
	}

	// Verifies that +logLaunchMetrics logs of the number of open tabs and nothing
	// more if the background date is not set;
	TEST_F(MetricsMediatorLogLaunchTest, logLaunchMetricsNoBackgroundDate) {
	// Setup.
	BOOL coldStart = NO;
	initiateMetricsMediator(coldStart, 32);
	// 32 tabs across five scenes.
	connected_scenes_ = [FakeSceneState sceneArrayWithCount:5
	profile:profile_.get()];
	[connected_scenes_[0] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:8];
	[connected_scenes_[1] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:8];
	// Scene 2 has zero tabs.
	[connected_scenes_[3] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:8];
	[connected_scenes_[4] appendWebStatesWithURL:GURL(kChromeUINewTabURL)
	count:8];

	id startupInformation =
	[OCMockObject mockForProtocol:@protocol(StartupInformation)];
	[[[startupInformation stub] andReturnValue:@(coldStart)] isColdStart];

	[[NSUserDefaults standardUserDefaults]
	removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

	// Action.
	[MetricsMediator logLaunchMetricsWithStartupInformation:startupInformation
	connectedScenes:connected_scenes_];
	// Tests.
	verifySwizzleHasBeenCalled();
	EXPECT_TRUE(num_live_ntp_tabs_has_been_called_);
	}

	using MetricsMediatorNoFixtureTest = PlatformTest;

	// Tests that +logDateInUserDefaults logs the date in UserDefaults.
	TEST_F(MetricsMediatorNoFixtureTest, logDateInUserDefaultsTest) {
	// Setup.
	[[NSUserDefaults standardUserDefaults]
	removeObjectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

	NSDate* lastAppClose = [[NSUserDefaults standardUserDefaults]
	objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];

	ASSERT_EQ(nil, lastAppClose);

	// Action.
	[MetricsMediator logDateInUserDefaults];

	// Setup.
	lastAppClose = [[NSUserDefaults standardUserDefaults]
	objectForKey:metrics_mediator::kAppEnteredBackgroundDateKey];
	EXPECT_NE(nil, lastAppClose);
	}

	// Tests that +logStartupDuration: calls
	// +endExtendedLaunchTask on cold start.
	TEST_F(MetricsMediatorNoFixtureTest, endExtendedLaunchTaskOnColdStart) {
	id startupInformation =
	[OCMockObject mockForProtocol:@protocol(StartupInformation)];
	[[[startupInformation stub] andReturnValue:@YES] isColdStart];

	base::TimeTicks time = base::TimeTicks();
	[[[startupInformation stub] andDo:^(NSInvocation* invocation) {
	[invocation setReturnValue:(void*)&time];
	}] appLaunchTime];

	[[[startupInformation stub] andDo:^(NSInvocation* invocation) {
	[invocation setReturnValue:(void*)&time];
	}] didFinishLaunchingTime];

	[[[startupInformation stub] andDo:^(NSInvocation* invocation) {
	[invocation setReturnValue:(void*)&time];
	}] firstSceneConnectionTime];

	id metricKitSubscriber =
	[OCMockObject mockForClass:[MetricKitSubscriber class]];
	[[metricKitSubscriber expect] endExtendedLaunchTask];

	[MetricsMediator logStartupDuration:startupInformation];
	EXPECT_OCMOCK_VERIFY(metricKitSubscriber);
	}

	// Tests that +logStartupDuration: does not call
	// +endExtendedLaunchTask on warm start.
	TEST_F(MetricsMediatorNoFixtureTest, endExtendedLaunchTaskOnWarmStart) {
	id startupInformation =
	[OCMockObject mockForProtocol:@protocol(StartupInformation)];
	[[[startupInformation stub] andReturnValue:@NO] isColdStart];

	id metricKitSubscriber =
	[OCMockObject mockForClass:[MetricKitSubscriber class]];
	[[metricKitSubscriber reject] endExtendedLaunchTask];

	[MetricsMediator logStartupDuration:startupInformation];
	EXPECT_OCMOCK_VERIFY(metricKitSubscriber);
	}