packages/flutter_tools/test/general.shard/analytics_test.dart - mirrors/flutter - Git at Google

 // Copyright 2014 The Flutter 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 'package:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/android/android_workflow.dart';
 import 'package:flutter_tools/src/base/config.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/time.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/build.dart';
 import 'package:flutter_tools/src/commands/config.dart';
 import 'package:flutter_tools/src/commands/doctor.dart';
 import 'package:flutter_tools/src/doctor.dart';
 import 'package:flutter_tools/src/doctor_validator.dart';
 import 'package:flutter_tools/src/features.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
 import 'package:flutter_tools/src/reporting/reporting.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 import 'package:flutter_tools/src/version.dart';
 import 'package:test/fake.dart';
 import 'package:usage/usage_io.dart';

 import '../src/common.dart';
 import '../src/context.dart';
 import '../src/fakes.dart';
 import '../src/test_flutter_command_runner.dart';

 void main() {
   setUpAll(() {
     Cache.disableLocking();
   });

   group('analytics', () {
     late Directory tempDir;
     late Config testConfig;

     setUp(() {
       Cache.flutterRoot = '../..';
       tempDir = globals.fs.systemTempDirectory.createTempSync('flutter_tools_analytics_test.');
       testConfig = Config.test();
     });

     tearDown(() {
       tryToDelete(tempDir);
     });

     // Ensure we don't send anything when analytics is disabled.
     testUsingContext("doesn't send when disabled", () async {
       int count = 0;
       globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);

       final FlutterCommand command = FakeFlutterCommand();
       final CommandRunner<void>runner = createTestCommandRunner(command);

       globals.flutterUsage.enabled = false;
       await runner.run(<String>['fake']);
       expect(count, 0);

       globals.flutterUsage.enabled = true;
       await runner.run(<String>['fake']);
       // LogToFileAnalytics isFirstRun is hardcoded to false
       // so this usage will never act like the first run
       // (which would not send usage).
       expect(count, 4);

       count = 0;
       globals.flutterUsage.enabled = false;
       await runner.run(<String>['fake']);

       expect(count, 0);
     }, overrides: <Type, Generator>{
       FlutterVersion: () => FlutterVersion(),
       Usage: () => Usage(
         configDirOverride: tempDir.path,
         logFile: tempDir.childFile('analytics.log').path,
         runningOnBot: true,
       ),
     });

     // Ensure we don't send for the 'flutter config' command.
     testUsingContext("config doesn't send", () async {
       int count = 0;
       globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);

       globals.flutterUsage.enabled = false;
       final ConfigCommand command = ConfigCommand();
       final CommandRunner<void> runner = createTestCommandRunner(command);
       await runner.run(<String>['config']);
       expect(count, 0);

       globals.flutterUsage.enabled = true;
       await runner.run(<String>['config']);

       expect(count, 0);
     }, overrides: <Type, Generator>{
       FlutterVersion: () => FlutterVersion(),
       Usage: () => Usage(
         configDirOverride: tempDir.path,
         logFile: tempDir.childFile('analytics.log').path,
         runningOnBot: true,
       ),
     });

     testUsingContext('Usage records one feature in experiment setting', () async {
       testConfig.setValue(flutterWebFeature.configSetting!, true);
       final Usage usage = Usage(runningOnBot: true);
       usage.sendCommand('test');

       final String featuresKey = cdKey(CustomDimensionsEnum.enabledFlutterFeatures);

       expect(globals.fs.file('test').readAsStringSync(), contains('$featuresKey: enable-web'));
     }, overrides: <Type, Generator>{
       FlutterVersion: () => FlutterVersion(),
       Config: () => testConfig,
       Platform: () => FakePlatform(environment: <String, String>{
         'FLUTTER_ANALYTICS_LOG_FILE': 'test',
       }),
       FileSystem: () => MemoryFileSystem.test(),
       ProcessManager: () => FakeProcessManager.any(),
     });

     testUsingContext('Usage records multiple features in experiment setting', () async {
       testConfig.setValue(flutterWebFeature.configSetting!, true);
       testConfig.setValue(flutterLinuxDesktopFeature.configSetting!, true);
       testConfig.setValue(flutterMacOSDesktopFeature.configSetting!, true);
       final Usage usage = Usage(runningOnBot: true);
       usage.sendCommand('test');

       final String featuresKey = cdKey(CustomDimensionsEnum.enabledFlutterFeatures);

       expect(
         globals.fs.file('test').readAsStringSync(),
         contains('$featuresKey: enable-web,enable-linux-desktop,enable-macos-desktop'),
       );
     }, overrides: <Type, Generator>{
       FlutterVersion: () => FlutterVersion(),
       Config: () => testConfig,
       Platform: () => FakePlatform(environment: <String, String>{
         'FLUTTER_ANALYTICS_LOG_FILE': 'test',
       }),
       FileSystem: () => MemoryFileSystem.test(),
       ProcessManager: () => FakeProcessManager.any(),
     });
   });

   group('analytics with fakes', () {
     late MemoryFileSystem memoryFileSystem;
     late FakeStdio fakeStdio;
     late TestUsage testUsage;
     late FakeClock fakeClock;
     late FakeDoctor doctor;

     setUp(() {
       memoryFileSystem = MemoryFileSystem.test();
       fakeStdio = FakeStdio();
       testUsage = TestUsage();
       fakeClock = FakeClock();
       doctor = FakeDoctor();
     });

     testUsingContext('flutter commands send timing events', () async {
       fakeClock.times = <int>[1000, 2000];
       doctor.diagnoseSucceeds = true;
       final DoctorCommand command = DoctorCommand();
       final CommandRunner<void> runner = createTestCommandRunner(command);
       await runner.run(<String>['doctor']);

       expect(testUsage.timings, contains(
         const TestTimingEvent(
             'flutter', 'doctor', Duration(milliseconds: 1000), label: 'success',
         ),
       ));
     }, overrides: <Type, Generator>{
       SystemClock: () => fakeClock,
       Doctor: () => doctor,
       Usage: () => testUsage,
     });

     testUsingContext('doctor fail sends warning', () async {
       fakeClock.times = <int>[1000, 2000];
       doctor.diagnoseSucceeds = false;
       final DoctorCommand command = DoctorCommand();
       final CommandRunner<void> runner = createTestCommandRunner(command);
       await runner.run(<String>['doctor']);


       expect(testUsage.timings, contains(
         const TestTimingEvent(
           'flutter', 'doctor', Duration(milliseconds: 1000), label: 'warning',
         ),
       ));
     }, overrides: <Type, Generator>{
       SystemClock: () => fakeClock,
       Doctor: () => doctor,
       Usage: () => testUsage,
     });

     testUsingContext('single command usage path', () async {
       final FlutterCommand doctorCommand = DoctorCommand();

       expect(await doctorCommand.usagePath, 'doctor');
     }, overrides: <Type, Generator>{
       Usage: () => testUsage,
     });

     testUsingContext('compound command usage path', () async {
       final BuildCommand buildCommand = BuildCommand();
       final FlutterCommand buildApkCommand = buildCommand.subcommands['apk']! as FlutterCommand;

       expect(await buildApkCommand.usagePath, 'build/apk');
     }, overrides: <Type, Generator>{
       Usage: () => testUsage,
     });

     testUsingContext('command sends localtime', () async {
       const int kMillis = 1000;
       fakeClock.times = <int>[kMillis];
       // Since FLUTTER_ANALYTICS_LOG_FILE is set in the environment, analytics
       // will be written to a file.
       final Usage usage = Usage(
         versionOverride: 'test',
         runningOnBot: true,
       );
       usage.suppressAnalytics = false;
       usage.enabled = true;

       usage.sendCommand('test');

       final String log = globals.fs.file('analytics.log').readAsStringSync();
       final DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(kMillis);

       expect(log.contains(formatDateTime(dateTime)), isTrue);
     }, overrides: <Type, Generator>{
       FileSystem: () => memoryFileSystem,
       ProcessManager: () => FakeProcessManager.any(),
       SystemClock: () => fakeClock,
       Platform: () => FakePlatform(
         environment: <String, String>{
           'FLUTTER_ANALYTICS_LOG_FILE': 'analytics.log',
         },
       ),
       Stdio: () => fakeStdio,
     });

     testUsingContext('event sends localtime', () async {
       const int kMillis = 1000;
       fakeClock.times = <int>[kMillis];
       // Since FLUTTER_ANALYTICS_LOG_FILE is set in the environment, analytics
       // will be written to a file.
       final Usage usage = Usage(
         versionOverride: 'test',
         runningOnBot: true,
       );
       usage.suppressAnalytics = false;
       usage.enabled = true;

       usage.sendEvent('test', 'test');

       final String log = globals.fs.file('analytics.log').readAsStringSync();
       final DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(kMillis);

       expect(log.contains(formatDateTime(dateTime)), isTrue);
     }, overrides: <Type, Generator>{
       FileSystem: () => memoryFileSystem,
       ProcessManager: () => FakeProcessManager.any(),
       SystemClock: () => fakeClock,
       Platform: () => FakePlatform(
         environment: <String, String>{
           'FLUTTER_ANALYTICS_LOG_FILE': 'analytics.log',
         },
       ),
       Stdio: () => fakeStdio,
     });
   });

   group('analytics bots', () {
     late Directory tempDir;

     setUp(() {
       tempDir = globals.fs.systemTempDirectory.createTempSync('flutter_tools_analytics_bots_test.');
     });

     tearDown(() {
       tryToDelete(tempDir);
     });

     testUsingContext("don't send on bots with unknown version", () async {
       int count = 0;
       globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);
       await createTestCommandRunner().run(<String>['--version']);

       expect(count, 0);
     }, overrides: <Type, Generator>{
       Usage: () => Usage(
         settingsName: 'flutter_bot_test',
         versionOverride: 'dev/unknown',
         configDirOverride: tempDir.path,
         runningOnBot: false,
       ),
     });

     testUsingContext("don't send on bots even when opted in", () async {
       int count = 0;
       globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);
       globals.flutterUsage.enabled = true;
       await createTestCommandRunner().run(<String>['--version']);

       expect(count, 0);
     }, overrides: <Type, Generator>{
       Usage: () => Usage(
         settingsName: 'flutter_bot_test',
         versionOverride: 'dev/unknown',
         configDirOverride: tempDir.path,
         runningOnBot: false,
       ),
     });

     testUsingContext('Uses AnalyticsMock when .flutter cannot be created', () async {
       final Usage usage = Usage(
         settingsName: 'flutter_bot_test',
         versionOverride: 'dev/known',
         configDirOverride: tempDir.path,
         analyticsIOFactory: throwingAnalyticsIOFactory,
         runningOnBot: false,
       );
       final AnalyticsMock analyticsMock = AnalyticsMock();

       expect(usage.clientId, analyticsMock.clientId);
       expect(usage.suppressAnalytics, isTrue);
     });
   });
 }

 Analytics throwingAnalyticsIOFactory(
   String trackingId,
   String applicationName,
   String applicationVersion, {
   String? analyticsUrl,
   Directory? documentDirectory,
 }) {
   throw const FileSystemException('Could not create file');
 }

 class FakeFlutterCommand extends FlutterCommand {
   @override
   String get description => 'A fake command';

   @override
   String get name => 'fake';

   @override
   Future<FlutterCommandResult> runCommand() async {
     return FlutterCommandResult.success();
   }
 }

 class FakeDoctor extends Fake implements Doctor {
   bool diagnoseSucceeds = false;

   @override
   Future<bool> diagnose({
     bool androidLicenses = false,
     bool verbose = true,
     bool showColor = true,
     AndroidLicenseValidator? androidLicenseValidator,
     bool showPii = true,
     List<ValidatorTask>? startedValidatorTasks,
     bool sendEvent = true,
   }) async {
     return diagnoseSucceeds;
   }
 }

 class FakeClock extends Fake implements SystemClock {
   List<int> times = <int>[];

   @override
   DateTime now() {
     return DateTime.fromMillisecondsSinceEpoch(times.removeAt(0));
   }
 }
	// Copyright 2014 The Flutter 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 'package:args/command_runner.dart';
	import 'package:file/memory.dart';
	import 'package:flutter_tools/src/android/android_workflow.dart';
	import 'package:flutter_tools/src/base/config.dart';
	import 'package:flutter_tools/src/base/file_system.dart';
	import 'package:flutter_tools/src/base/io.dart';
	import 'package:flutter_tools/src/base/platform.dart';
	import 'package:flutter_tools/src/base/time.dart';
	import 'package:flutter_tools/src/cache.dart';
	import 'package:flutter_tools/src/commands/build.dart';
	import 'package:flutter_tools/src/commands/config.dart';
	import 'package:flutter_tools/src/commands/doctor.dart';
	import 'package:flutter_tools/src/doctor.dart';
	import 'package:flutter_tools/src/doctor_validator.dart';
	import 'package:flutter_tools/src/features.dart';
	import 'package:flutter_tools/src/globals.dart' as globals;
	import 'package:flutter_tools/src/reporting/reporting.dart';
	import 'package:flutter_tools/src/runner/flutter_command.dart';
	import 'package:flutter_tools/src/version.dart';
	import 'package:test/fake.dart';
	import 'package:usage/usage_io.dart';

	import '../src/common.dart';
	import '../src/context.dart';
	import '../src/fakes.dart';
	import '../src/test_flutter_command_runner.dart';

	void main() {
	setUpAll(() {
	Cache.disableLocking();
	});

	group('analytics', () {
	late Directory tempDir;
	late Config testConfig;

	setUp(() {
	Cache.flutterRoot = '../..';
	tempDir = globals.fs.systemTempDirectory.createTempSync('flutter_tools_analytics_test.');
	testConfig = Config.test();
	});

	tearDown(() {
	tryToDelete(tempDir);
	});

	// Ensure we don't send anything when analytics is disabled.
	testUsingContext("doesn't send when disabled", () async {
	int count = 0;
	globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);

	final FlutterCommand command = FakeFlutterCommand();
	final CommandRunner<void>runner = createTestCommandRunner(command);

	globals.flutterUsage.enabled = false;
	await runner.run(<String>['fake']);
	expect(count, 0);

	globals.flutterUsage.enabled = true;
	await runner.run(<String>['fake']);
	// LogToFileAnalytics isFirstRun is hardcoded to false
	// so this usage will never act like the first run
	// (which would not send usage).
	expect(count, 4);

	count = 0;
	globals.flutterUsage.enabled = false;
	await runner.run(<String>['fake']);

	expect(count, 0);
	}, overrides: <Type, Generator>{
	FlutterVersion: () => FlutterVersion(),
	Usage: () => Usage(
	configDirOverride: tempDir.path,
	logFile: tempDir.childFile('analytics.log').path,
	runningOnBot: true,
	),
	});

	// Ensure we don't send for the 'flutter config' command.
	testUsingContext("config doesn't send", () async {
	int count = 0;
	globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);

	globals.flutterUsage.enabled = false;
	final ConfigCommand command = ConfigCommand();
	final CommandRunner<void> runner = createTestCommandRunner(command);
	await runner.run(<String>['config']);
	expect(count, 0);

	globals.flutterUsage.enabled = true;
	await runner.run(<String>['config']);

	expect(count, 0);
	}, overrides: <Type, Generator>{
	FlutterVersion: () => FlutterVersion(),
	Usage: () => Usage(
	configDirOverride: tempDir.path,
	logFile: tempDir.childFile('analytics.log').path,
	runningOnBot: true,
	),
	});

	testUsingContext('Usage records one feature in experiment setting', () async {
	testConfig.setValue(flutterWebFeature.configSetting!, true);
	final Usage usage = Usage(runningOnBot: true);
	usage.sendCommand('test');

	final String featuresKey = cdKey(CustomDimensionsEnum.enabledFlutterFeatures);

	expect(globals.fs.file('test').readAsStringSync(), contains('$featuresKey: enable-web'));
	}, overrides: <Type, Generator>{
	FlutterVersion: () => FlutterVersion(),
	Config: () => testConfig,
	Platform: () => FakePlatform(environment: <String, String>{
	'FLUTTER_ANALYTICS_LOG_FILE': 'test',
	}),
	FileSystem: () => MemoryFileSystem.test(),
	ProcessManager: () => FakeProcessManager.any(),
	});

	testUsingContext('Usage records multiple features in experiment setting', () async {
	testConfig.setValue(flutterWebFeature.configSetting!, true);
	testConfig.setValue(flutterLinuxDesktopFeature.configSetting!, true);
	testConfig.setValue(flutterMacOSDesktopFeature.configSetting!, true);
	final Usage usage = Usage(runningOnBot: true);
	usage.sendCommand('test');

	final String featuresKey = cdKey(CustomDimensionsEnum.enabledFlutterFeatures);

	expect(
	globals.fs.file('test').readAsStringSync(),
	contains('$featuresKey: enable-web,enable-linux-desktop,enable-macos-desktop'),
	);
	}, overrides: <Type, Generator>{
	FlutterVersion: () => FlutterVersion(),
	Config: () => testConfig,
	Platform: () => FakePlatform(environment: <String, String>{
	'FLUTTER_ANALYTICS_LOG_FILE': 'test',
	}),
	FileSystem: () => MemoryFileSystem.test(),
	ProcessManager: () => FakeProcessManager.any(),
	});
	});

	group('analytics with fakes', () {
	late MemoryFileSystem memoryFileSystem;
	late FakeStdio fakeStdio;
	late TestUsage testUsage;
	late FakeClock fakeClock;
	late FakeDoctor doctor;

	setUp(() {
	memoryFileSystem = MemoryFileSystem.test();
	fakeStdio = FakeStdio();
	testUsage = TestUsage();
	fakeClock = FakeClock();
	doctor = FakeDoctor();
	});

	testUsingContext('flutter commands send timing events', () async {
	fakeClock.times = <int>[1000, 2000];
	doctor.diagnoseSucceeds = true;
	final DoctorCommand command = DoctorCommand();
	final CommandRunner<void> runner = createTestCommandRunner(command);
	await runner.run(<String>['doctor']);

	expect(testUsage.timings, contains(
	const TestTimingEvent(
	'flutter', 'doctor', Duration(milliseconds: 1000), label: 'success',
	),
	));
	}, overrides: <Type, Generator>{
	SystemClock: () => fakeClock,
	Doctor: () => doctor,
	Usage: () => testUsage,
	});

	testUsingContext('doctor fail sends warning', () async {
	fakeClock.times = <int>[1000, 2000];
	doctor.diagnoseSucceeds = false;
	final DoctorCommand command = DoctorCommand();
	final CommandRunner<void> runner = createTestCommandRunner(command);
	await runner.run(<String>['doctor']);


	expect(testUsage.timings, contains(
	const TestTimingEvent(
	'flutter', 'doctor', Duration(milliseconds: 1000), label: 'warning',
	),
	));
	}, overrides: <Type, Generator>{
	SystemClock: () => fakeClock,
	Doctor: () => doctor,
	Usage: () => testUsage,
	});

	testUsingContext('single command usage path', () async {
	final FlutterCommand doctorCommand = DoctorCommand();

	expect(await doctorCommand.usagePath, 'doctor');
	}, overrides: <Type, Generator>{
	Usage: () => testUsage,
	});

	testUsingContext('compound command usage path', () async {
	final BuildCommand buildCommand = BuildCommand();
	final FlutterCommand buildApkCommand = buildCommand.subcommands['apk']! as FlutterCommand;

	expect(await buildApkCommand.usagePath, 'build/apk');
	}, overrides: <Type, Generator>{
	Usage: () => testUsage,
	});

	testUsingContext('command sends localtime', () async {
	const int kMillis = 1000;
	fakeClock.times = <int>[kMillis];
	// Since FLUTTER_ANALYTICS_LOG_FILE is set in the environment, analytics
	// will be written to a file.
	final Usage usage = Usage(
	versionOverride: 'test',
	runningOnBot: true,
	);
	usage.suppressAnalytics = false;
	usage.enabled = true;

	usage.sendCommand('test');

	final String log = globals.fs.file('analytics.log').readAsStringSync();
	final DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(kMillis);

	expect(log.contains(formatDateTime(dateTime)), isTrue);
	}, overrides: <Type, Generator>{
	FileSystem: () => memoryFileSystem,
	ProcessManager: () => FakeProcessManager.any(),
	SystemClock: () => fakeClock,
	Platform: () => FakePlatform(
	environment: <String, String>{
	'FLUTTER_ANALYTICS_LOG_FILE': 'analytics.log',
	},
	),
	Stdio: () => fakeStdio,
	});

	testUsingContext('event sends localtime', () async {
	const int kMillis = 1000;
	fakeClock.times = <int>[kMillis];
	// Since FLUTTER_ANALYTICS_LOG_FILE is set in the environment, analytics
	// will be written to a file.
	final Usage usage = Usage(
	versionOverride: 'test',
	runningOnBot: true,
	);
	usage.suppressAnalytics = false;
	usage.enabled = true;

	usage.sendEvent('test', 'test');

	final String log = globals.fs.file('analytics.log').readAsStringSync();
	final DateTime dateTime = DateTime.fromMillisecondsSinceEpoch(kMillis);

	expect(log.contains(formatDateTime(dateTime)), isTrue);
	}, overrides: <Type, Generator>{
	FileSystem: () => memoryFileSystem,
	ProcessManager: () => FakeProcessManager.any(),
	SystemClock: () => fakeClock,
	Platform: () => FakePlatform(
	environment: <String, String>{
	'FLUTTER_ANALYTICS_LOG_FILE': 'analytics.log',
	},
	),
	Stdio: () => fakeStdio,
	});
	});

	group('analytics bots', () {
	late Directory tempDir;

	setUp(() {
	tempDir = globals.fs.systemTempDirectory.createTempSync('flutter_tools_analytics_bots_test.');
	});

	tearDown(() {
	tryToDelete(tempDir);
	});

	testUsingContext("don't send on bots with unknown version", () async {
	int count = 0;
	globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);
	await createTestCommandRunner().run(<String>['--version']);

	expect(count, 0);
	}, overrides: <Type, Generator>{
	Usage: () => Usage(
	settingsName: 'flutter_bot_test',
	versionOverride: 'dev/unknown',
	configDirOverride: tempDir.path,
	runningOnBot: false,
	),
	});

	testUsingContext("don't send on bots even when opted in", () async {
	int count = 0;
	globals.flutterUsage.onSend.listen((Map<String, dynamic> data) => count++);
	globals.flutterUsage.enabled = true;
	await createTestCommandRunner().run(<String>['--version']);

	expect(count, 0);
	}, overrides: <Type, Generator>{
	Usage: () => Usage(
	settingsName: 'flutter_bot_test',
	versionOverride: 'dev/unknown',
	configDirOverride: tempDir.path,
	runningOnBot: false,
	),
	});

	testUsingContext('Uses AnalyticsMock when .flutter cannot be created', () async {
	final Usage usage = Usage(
	settingsName: 'flutter_bot_test',
	versionOverride: 'dev/known',
	configDirOverride: tempDir.path,
	analyticsIOFactory: throwingAnalyticsIOFactory,
	runningOnBot: false,
	);
	final AnalyticsMock analyticsMock = AnalyticsMock();

	expect(usage.clientId, analyticsMock.clientId);
	expect(usage.suppressAnalytics, isTrue);
	});
	});
	}

	Analytics throwingAnalyticsIOFactory(
	String trackingId,
	String applicationName,
	String applicationVersion, {
	String? analyticsUrl,
	Directory? documentDirectory,
	}) {
	throw const FileSystemException('Could not create file');
	}

	class FakeFlutterCommand extends FlutterCommand {
	@override
	String get description => 'A fake command';

	@override
	String get name => 'fake';

	@override
	Future<FlutterCommandResult> runCommand() async {
	return FlutterCommandResult.success();
	}
	}

	class FakeDoctor extends Fake implements Doctor {
	bool diagnoseSucceeds = false;

	@override
	Future<bool> diagnose({
	bool androidLicenses = false,
	bool verbose = true,
	bool showColor = true,
	AndroidLicenseValidator? androidLicenseValidator,
	bool showPii = true,
	List<ValidatorTask>? startedValidatorTasks,
	bool sendEvent = true,
	}) async {
	return diagnoseSucceeds;
	}
	}

	class FakeClock extends Fake implements SystemClock {
	List<int> times = <int>[];

	@override
	DateTime now() {
	return DateTime.fromMillisecondsSinceEpoch(times.removeAt(0));
	}
	}