Migrate some test files to null safety (#104469)

packages/flutter_tools/test/general.shard/android/android_device_discovery_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/android/android_device_discovery.dart';
 import 'package:flutter_tools/src/android/android_sdk.dart';
@@ -15,11 +13,11 @@ import 'package:flutter_tools/src/device.dart';
 import 'package:test/fake.dart';
 
 import '../../src/common.dart';
-import '../../src/context.dart';
+import '../../src/fake_process_manager.dart';
 import '../../src/fakes.dart';
 
 void main() {
-  AndroidWorkflow androidWorkflow;
+  late AndroidWorkflow androidWorkflow;
 
   setUp(() {
     androidWorkflow = AndroidWorkflow(
@@ -243,5 +241,5 @@ class FakeAndroidSdk extends Fake implements AndroidSdk {
   FakeAndroidSdk([this.adbPath = 'adb']);
 
   @override
-  final String adbPath;
+  final String? adbPath;
 }

packages/flutter_tools/test/general.shard/android/android_workflow_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/android/android_sdk.dart';
 import 'package:flutter_tools/src/android/android_studio.dart';
@@ -18,15 +16,15 @@ import 'package:flutter_tools/src/doctor_validator.dart';
 import 'package:test/fake.dart';
 
 import '../../src/common.dart';
-import '../../src/context.dart';
+import '../../src/fake_process_manager.dart';
 import '../../src/fakes.dart';
 
 void main() {
-  FakeAndroidSdk sdk;
-  Logger logger;
-  MemoryFileSystem fileSystem;
-  FakeProcessManager processManager;
-  FakeStdio stdio;
+  late FakeAndroidSdk sdk;
+  late Logger logger;
+  late MemoryFileSystem fileSystem;
+  late FakeProcessManager processManager;
+  late FakeStdio stdio;
 
   setUp(() {
     sdk = FakeAndroidSdk();
@@ -532,31 +530,31 @@ Review licenses that have not been accepted (y/N)?
 
 class FakeAndroidSdk extends Fake implements AndroidSdk {
   @override
-  String sdkManagerPath;
+  String? sdkManagerPath;
 
   @override
-  String sdkManagerVersion;
+  String? sdkManagerVersion;
 
   @override
-  String adbPath;
+  String? adbPath;
 
   @override
-  bool licensesAvailable;
+  bool licensesAvailable = false;
 
   @override
-  bool platformToolsAvailable;
+  bool platformToolsAvailable = false;
 
   @override
-  bool cmdlineToolsAvailable;
+  bool cmdlineToolsAvailable = false;
 
   @override
-  Directory directory;
+  Directory directory = MemoryFileSystem.test().directory('/foo/bar');
 
   @override
-  AndroidSdkVersion latestVersion;
+  AndroidSdkVersion? latestVersion;
 
   @override
-  String emulatorPath;
+  String? emulatorPath;
 
   @override
   List<String> validateSdkWellFormed() => <String>[];
@@ -567,10 +565,10 @@ class FakeAndroidSdk extends Fake implements AndroidSdk {
 
 class FakeAndroidSdkVersion extends Fake implements AndroidSdkVersion {
   @override
-  int sdkLevel;
+  int sdkLevel = 0;
 
   @override
-  Version buildToolsVersion;
+  Version buildToolsVersion = Version(0, 0, 0);
 
   @override
   String get buildToolsVersionName => '';

packages/flutter_tools/test/general.shard/build_system/targets/desktop_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:file_testing/file_testing.dart';
 import 'package:flutter_tools/src/base/file_system.dart';

packages/flutter_tools/test/general.shard/flutter_validator_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/artifacts.dart';
 import 'package:flutter_tools/src/base/os.dart';
@@ -20,9 +18,9 @@ import '../src/fakes.dart';
 
 /// Matches a doctor validation result.
 Matcher _matchDoctorValidation({
-  ValidationType validationType,
-  String statusInfo,
-  dynamic messages
+  required ValidationType validationType,
+  required String statusInfo,
+  required Object messages
 }) {
   return const TypeMatcher<ValidationResult>()
       .having((ValidationResult result) => result.type, 'type', validationType)
@@ -235,7 +233,7 @@ void main() {
 }
 
 class FakeOperatingSystemUtils extends Fake implements OperatingSystemUtils {
-  FakeOperatingSystemUtils({this.name});
+  FakeOperatingSystemUtils({required this.name});
 
   @override
   final String name;

packages/flutter_tools/test/general.shard/ios/ios_device_install_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/artifacts.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
@@ -17,7 +15,6 @@ import 'package:flutter_tools/src/ios/devices.dart';
 import 'package:flutter_tools/src/ios/ios_deploy.dart';
 import 'package:flutter_tools/src/ios/iproxy.dart';
 import 'package:flutter_tools/src/ios/mac.dart';
-import 'package:meta/meta.dart';
 
 import '../../src/common.dart';
 import '../../src/fake_process_manager.dart';
@@ -28,10 +25,10 @@ const Map<String, String> kDyLdLibEntry = <String, String>{
 };
 
 void main() {
-  Artifacts artifacts;
-  String iosDeployPath;
-  FileSystem fileSystem;
-  Directory bundleDirectory;
+  late Artifacts artifacts;
+  late String iosDeployPath;
+  late FileSystem fileSystem;
+  late Directory bundleDirectory;
 
   setUp(() {
     artifacts = Artifacts.test();
@@ -319,11 +316,11 @@ void main() {
 }
 
 IOSDevice setUpIOSDevice({
-  @required ProcessManager processManager,
-  FileSystem fileSystem,
-  Logger logger,
-  IOSDeviceConnectionInterface interfaceType,
-  Artifacts artifacts,
+  required ProcessManager processManager,
+  FileSystem? fileSystem,
+  Logger? logger,
+  IOSDeviceConnectionInterface? interfaceType,
+  Artifacts? artifacts,
 }) {
   logger ??= BufferLogger.test();
   final FakePlatform platform = FakePlatform(
@@ -360,6 +357,6 @@ IOSDevice setUpIOSDevice({
       cache: cache,
     ),
     iProxy: IProxy.test(logger: logger, processManager: processManager),
-    interfaceType: interfaceType,
+    interfaceType: interfaceType ?? IOSDeviceConnectionInterface.usb,
   );
 }

packages/flutter_tools/test/general.shard/ios/ios_device_logger_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'dart:async';
 
 import 'package:flutter_tools/src/artifacts.dart';
@@ -24,11 +22,11 @@ import '../../src/fake_process_manager.dart';
 import '../../src/fake_vm_services.dart';
 
 void main() {
-  FakeProcessManager processManager;
-  Artifacts artifacts;
-  Cache fakeCache;
-  BufferLogger logger;
-  String ideviceSyslogPath;
+  late FakeProcessManager processManager;
+  late Artifacts artifacts;
+  late Cache fakeCache;
+  late BufferLogger logger;
+  late String ideviceSyslogPath;
 
   setUp(() {
     processManager = FakeProcessManager.empty();
@@ -328,8 +326,8 @@ Runner(libsystem_asl.dylib)[297] <Notice>: libMobileGestalt
         ),
         useSyslog: false,
       );
-      Object exception;
-      StackTrace trace;
+      Object? exception;
+      StackTrace? trace;
       await asyncGuard(
           () async {
             await logReader.linesController.close();

packages/flutter_tools/test/general.shard/ios/ios_device_start_prebuilt_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'dart:async';
 import 'dart:convert';
 
@@ -66,8 +64,8 @@ const FakeCommand kLaunchDebugCommand = FakeCommand(command: <String>[
 
 // The command used to actually launch the app and attach the debugger with args in debug.
 FakeCommand attachDebuggerCommand({
-  IOSink stdin,
-  Completer<void>/*?*/ completer,
+  IOSink? stdin,
+  Completer<void>? completer,
 }) {
   return FakeCommand(
     command: const <String>[
@@ -359,10 +357,10 @@ void main() {
 
 IOSDevice setUpIOSDevice({
   String sdkVersion = '13.0.1',
-  FileSystem fileSystem,
-  Logger logger,
-  ProcessManager processManager,
-  IOSDeploy iosDeploy,
+  FileSystem? fileSystem,
+  Logger? logger,
+  ProcessManager? processManager,
+  IOSDeploy? iosDeploy,
 }) {
   final Artifacts artifacts = Artifacts.test();
   final FakePlatform macPlatform = FakePlatform(
@@ -377,24 +375,24 @@ IOSDevice setUpIOSDevice({
     ],
     processManager: FakeProcessManager.any(),
   );
-
+  logger ??= BufferLogger.test();
   return IOSDevice('123',
     name: 'iPhone 1',
     sdkVersion: sdkVersion,
     fileSystem: fileSystem ?? MemoryFileSystem.test(),
     platform: macPlatform,
     iProxy: IProxy.test(logger: logger, processManager: processManager ?? FakeProcessManager.any()),
-    logger: logger ?? BufferLogger.test(),
+    logger: logger,
     iosDeploy: iosDeploy ??
         IOSDeploy(
-          logger: logger ?? BufferLogger.test(),
+          logger: logger,
           platform: macPlatform,
           processManager: processManager ?? FakeProcessManager.any(),
           artifacts: artifacts,
           cache: cache,
         ),
     iMobileDevice: IMobileDevice(
-      logger: logger ?? BufferLogger.test(),
+      logger: logger,
       processManager: processManager ?? FakeProcessManager.any(),
       artifacts: artifacts,
       cache: cache,

packages/flutter_tools/test/general.shard/linux/linux_device_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';

packages/flutter_tools/test/general.shard/macos/macos_ipad_device_test.dart

@@ -2,22 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// @dart = 2.8
-
 import 'package:file/memory.dart';
+import 'package:flutter_tools/src/application_package.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/os.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/desktop_device.dart';
 import 'package:flutter_tools/src/device.dart';
+import 'package:flutter_tools/src/ios/application_package.dart';
 import 'package:flutter_tools/src/ios/ios_workflow.dart';
 import 'package:flutter_tools/src/macos/macos_ipad_device.dart';
-import 'package:meta/meta.dart';
 import 'package:test/fake.dart';
 
 import '../../src/common.dart';
-import '../../src/context.dart';
+import '../../src/fake_process_manager.dart';
 import '../../src/fakes.dart';
 
 void main() {
@@ -125,25 +124,34 @@ void main() {
     expect(device.portForwarder, isNot(isNull));
     expect(await device.targetPlatform, TargetPlatform.darwin);
 
-    expect(await device.installApp(null), isTrue);
-    expect(await device.isAppInstalled(null), isTrue);
-    expect(await device.isLatestBuildInstalled(null), isTrue);
-    expect(await device.uninstallApp(null), isTrue);
+    expect(await device.installApp(FakeApplicationPackage()), isTrue);
+    expect(await device.isAppInstalled(FakeApplicationPackage()), isTrue);
+    expect(await device.isLatestBuildInstalled(FakeApplicationPackage()), isTrue);
+    expect(await device.uninstallApp(FakeApplicationPackage()), isTrue);
 
     expect(device.isSupported(), isTrue);
     expect(device.getLogReader(), isA<DesktopLogReader>());
 
-     expect(await device.stopApp(null), isFalse);
+     expect(await device.stopApp(FakeIOSApp()), isFalse);
 
-    await expectLater(() => device.startApp(null, debuggingOptions: null), throwsA(isA<UnimplementedError>()));
-    await expectLater(() => device.buildForDevice(null, buildInfo: BuildInfo.debug), throwsA(isA<UnimplementedError>()));
-    expect(device.executablePathForDevice(null, null), null);
+    await expectLater(
+          () => device.startApp(
+        FakeIOSApp(),
+        debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
+      ),
+      throwsA(isA<UnimplementedError>()),
+    );
+    await expectLater(() => device.buildForDevice(FakeIOSApp(), buildInfo: BuildInfo.debug), throwsA(isA<UnimplementedError>()));
+    expect(device.executablePathForDevice(FakeIOSApp(), BuildMode.debug), null);
   });
 }
 
 class FakeIOSWorkflow extends Fake implements IOSWorkflow {
-  FakeIOSWorkflow({@required this.canListDevices});
+  FakeIOSWorkflow({required this.canListDevices});
 
   @override
   final bool canListDevices;
 }
+
+class FakeApplicationPackage extends Fake implements ApplicationPackage {}
+class FakeIOSApp extends Fake implements IOSApp {}