Null safety migration of packages/flutter_tools/test/commands.shard/hermetic, part 1/3 (#110707)

* Migrate packages/flutter_tools/test/commands.shard/hermetic, part 1/3

* Fix tests

* Fix analysis

* Fix analyze_test

* Make AnalysisServer a local variable

* Chris's comments

packages/flutter_tools/lib/src/commands/analyze_base.dart

@@ -87,7 +87,7 @@ abstract class AnalyzeBase {
     return artifacts.getHostArtifact(HostArtifact.engineDartSdkPath).path;
   }
   bool get isBenchmarking => argResults['benchmark'] as bool;
-  String get protocolTrafficLog => argResults['protocol-traffic-log'] as String;
+  String? get protocolTrafficLog => argResults['protocol-traffic-log'] as String?;
 
   /// Generate an analysis summary for both [AnalyzeOnce], [AnalyzeContinuously].
   static String generateErrorsMessage({

packages/flutter_tools/test/commands.shard/hermetic/analyze_continuously_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:fake_async/fake_async.dart';
@@ -32,13 +30,12 @@ void main() {
     Cache.flutterRoot = getFlutterRoot();
   });
 
-  AnalysisServer server;
-  Directory tempDir;
-  FileSystem fileSystem;
-  Platform platform;
-  ProcessManager processManager;
-  AnsiTerminal terminal;
-  Logger logger;
+  late Directory tempDir;
+  late FileSystem fileSystem;
+  late Platform platform;
+  late ProcessManager processManager;
+  late AnsiTerminal terminal;
+  late Logger logger;
 
   setUp(() {
     fileSystem = globals.localFileSystem;
@@ -51,7 +48,6 @@ void main() {
 
   tearDown(() {
     tryToDelete(tempDir);
-    return server?.dispose();
   });
 
 
@@ -88,11 +84,10 @@ void main() {
       await pub.get(
         context: PubContext.flutterTests,
         directory: tempDir.path,
-        generateSyntheticPackage: false,
       );
 
-      server = AnalysisServer(
-        globals.artifacts.getHostArtifact(HostArtifact.engineDartSdkPath).path,
+      final AnalysisServer server = AnalysisServer(
+        globals.artifacts!.getHostArtifact(HostArtifact.engineDartSdkPath).path,
         <String>[tempDir.path],
         fileSystem: fileSystem,
         platform: platform,
@@ -109,6 +104,8 @@ void main() {
       await onDone;
 
       expect(errorCount, 0);
+
+      await server.dispose();
     });
   });
 
@@ -126,18 +123,17 @@ void main() {
     await pub.get(
       context: PubContext.flutterTests,
       directory: tempDir.path,
-      generateSyntheticPackage: false,
     );
 
-      server = AnalysisServer(
-        globals.artifacts.getHostArtifact(HostArtifact.engineDartSdkPath).path,
-        <String>[tempDir.path],
-        fileSystem: fileSystem,
-        platform: platform,
-        processManager: processManager,
-        logger: logger,
-        terminal: terminal,
-      );
+    final AnalysisServer server = AnalysisServer(
+      globals.artifacts!.getHostArtifact(HostArtifact.engineDartSdkPath).path,
+      <String>[tempDir.path],
+      fileSystem: fileSystem,
+      platform: platform,
+      processManager: processManager,
+      logger: logger,
+      terminal: terminal,
+    );
 
     int errorCount = 0;
     final Future<bool> onDone = server.onAnalyzing.where((bool analyzing) => analyzing == false).first;
@@ -149,13 +145,15 @@ void main() {
     await onDone;
 
     expect(errorCount, greaterThan(0));
+
+    await server.dispose();
   });
 
   testUsingContext('Returns no errors when source is error-free', () async {
     const String contents = "StringBuffer bar = StringBuffer('baz');";
     tempDir.childFile('main.dart').writeAsStringSync(contents);
-    server = AnalysisServer(
-      globals.artifacts.getHostArtifact(HostArtifact.engineDartSdkPath).path,
+    final AnalysisServer server = AnalysisServer(
+      globals.artifacts!.getHostArtifact(HostArtifact.engineDartSdkPath).path,
       <String>[tempDir.path],
       fileSystem: fileSystem,
       platform: platform,
@@ -172,6 +170,7 @@ void main() {
     await server.start();
     await onDone;
     expect(errorCount, 0);
+    await server.dispose();
   });
 
   testUsingContext('Can run AnalysisService with customized cache location', () async {

packages/flutter_tools/test/commands.shard/hermetic/analyze_suggestion_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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/artifacts.dart';
@@ -22,7 +20,7 @@ import '../../src/test_flutter_command_runner.dart';
 
 class ProjectValidatorDummy extends ProjectValidator {
   @override
-  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger logger, FileSystem fileSystem}) async{
+  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger? logger, FileSystem? fileSystem}) async{
     return <ProjectValidatorResult>[
       const ProjectValidatorResult(name: 'pass', value: 'value', status: StatusProjectValidator.success),
       const ProjectValidatorResult(name: 'fail', value: 'my error', status: StatusProjectValidator.error),
@@ -41,7 +39,7 @@ class ProjectValidatorDummy extends ProjectValidator {
 
 class ProjectValidatorSecondDummy extends ProjectValidator {
   @override
-  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger logger, FileSystem fileSystem}) async{
+  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger? logger, FileSystem? fileSystem}) async{
     return <ProjectValidatorResult>[
       const ProjectValidatorResult(name: 'second', value: 'pass', status: StatusProjectValidator.success),
       const ProjectValidatorResult(name: 'other fail', value: 'second fail', status: StatusProjectValidator.error),
@@ -59,7 +57,7 @@ class ProjectValidatorSecondDummy extends ProjectValidator {
 
 class ProjectValidatorCrash extends ProjectValidator {
   @override
-  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger logger, FileSystem fileSystem}) async{
+  Future<List<ProjectValidatorResult>> start(FlutterProject project, {Logger? logger, FileSystem? fileSystem}) async{
     throw Exception('my exception');
   }
 
@@ -73,10 +71,10 @@ class ProjectValidatorCrash extends ProjectValidator {
 }
 
 void main() {
-  FileSystem fileSystem;
-  Terminal terminal;
-  ProcessManager processManager;
-  Platform platform;
+  late FileSystem fileSystem;
+  late Terminal terminal;
+  late ProcessManager processManager;
+  late Platform platform;
 
   group('analyze --suggestions command', () {
 

packages/flutter_tools/test/commands.shard/hermetic/analyze_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:args/command_runner.dart';
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
@@ -46,13 +44,13 @@ void main() {
   });
 
   group('analyze command', () {
-    FileSystem fileSystem;
-    Platform platform;
-    BufferLogger logger;
-    FakeProcessManager processManager;
-    Terminal terminal;
-    AnalyzeCommand command;
-    CommandRunner<void> runner;
+    late FileSystem fileSystem;
+    late Platform platform;
+    late BufferLogger logger;
+    late FakeProcessManager processManager;
+    late Terminal terminal;
+    late AnalyzeCommand command;
+    late CommandRunner<void> runner;
 
     setUpAll(() {
       Cache.disableLocking();
@@ -130,8 +128,8 @@ void main() {
     // Absolute paths
     expect(inRepo(<String>[tempDir.path], fileSystem), isFalse);
     expect(inRepo(<String>[fileSystem.path.join(tempDir.path, 'foo')], fileSystem), isFalse);
-    expect(inRepo(<String>[Cache.flutterRoot], fileSystem), isTrue);
-    expect(inRepo(<String>[fileSystem.path.join(Cache.flutterRoot, 'foo')], fileSystem), isTrue);
+    expect(inRepo(<String>[Cache.flutterRoot!], fileSystem), isTrue);
+    expect(inRepo(<String>[fileSystem.path.join(Cache.flutterRoot!, 'foo')], fileSystem), isTrue);
 
     // Relative paths
     fileSystem.currentDirectory = Cache.flutterRoot;
@@ -158,6 +156,7 @@ void main() {
         'startColumn': 4,
       },
       'message': 'Prefer final for variable declarations if they are not reassigned.',
+      'code': 'var foo = 123;',
       'hasFix': false,
     };
     expect(WrittenError.fromJson(json).toString(),
@@ -165,11 +164,11 @@ void main() {
   });
 }
 
-bool inRepo(List<String> fileList, FileSystem fileSystem) {
+bool inRepo(List<String>? fileList, FileSystem fileSystem) {
   if (fileList == null || fileList.isEmpty) {
     fileList = <String>[fileSystem.path.current];
   }
-  final String root = fileSystem.path.normalize(fileSystem.path.absolute(Cache.flutterRoot));
+  final String root = fileSystem.path.normalize(fileSystem.path.absolute(Cache.flutterRoot!));
   final String prefix = root + fileSystem.path.separator;
   for (String file in fileList) {
     file = fileSystem.path.normalize(fileSystem.path.absolute(file));

packages/flutter_tools/test/commands.shard/hermetic/assemble_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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:file_testing/file_testing.dart';

packages/flutter_tools/test/commands.shard/hermetic/build_darwin_framework_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/platform.dart';
@@ -21,9 +19,9 @@ import '../../src/fakes.dart';
 import '../../src/test_build_system.dart';
 
 void main() {
-  MemoryFileSystem memoryFileSystem;
-  Directory outputDirectory;
-  FakePlatform fakePlatform;
+  late MemoryFileSystem memoryFileSystem;
+  late Directory outputDirectory;
+  late FakePlatform fakePlatform;
 
   setUpAll(() {
     Cache.disableLocking();
@@ -48,7 +46,7 @@ void main() {
   group('build ios-framework', () {
     group('podspec', () {
       const String engineRevision = '0123456789abcdef';
-      Cache cache;
+      late Cache cache;
 
       setUp(() {
         final Directory rootOverride = memoryFileSystem.directory('cache');
@@ -181,7 +179,7 @@ void main() {
         });
 
         group('not on master channel', () {
-          FakeFlutterVersion fakeFlutterVersion;
+          late FakeFlutterVersion fakeFlutterVersion;
           setUp(() {
             const GitTagVersion gitTagVersion = GitTagVersion(
               x: 1,
@@ -277,7 +275,7 @@ void main() {
   group('build macos-framework', () {
     group('podspec', () {
       const String engineRevision = '0123456789abcdef';
-      Cache cache;
+      late Cache cache;
 
       setUp(() {
         final Directory rootOverride = memoryFileSystem.directory('cache');
@@ -410,7 +408,7 @@ void main() {
         });
 
         group('not on master channel', () {
-          FakeFlutterVersion fakeFlutterVersion;
+          late FakeFlutterVersion fakeFlutterVersion;
           setUp(() {
             const GitTagVersion gitTagVersion = GitTagVersion(
               x: 1,
@@ -504,8 +502,8 @@ void main() {
   });
 
   group('XCFrameworks', () {
-    MemoryFileSystem fileSystem;
-    FakeProcessManager fakeProcessManager;
+    late MemoryFileSystem fileSystem;
+    late FakeProcessManager fakeProcessManager;
 
     setUp(() {
       fileSystem = MemoryFileSystem.test();

packages/flutter_tools/test/commands.shard/hermetic/build_ios_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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
@@ -28,21 +26,21 @@ class FakeXcodeProjectInterpreterWithBuildSettings extends FakeXcodeProjectInter
   @override
   Future<Map<String, String>> getBuildSettings(
       String projectPath, {
-        XcodeProjectBuildContext buildContext,
+        XcodeProjectBuildContext? buildContext,
         Duration timeout = const Duration(minutes: 1),
       }) async {
     return <String, String>{
       'PRODUCT_BUNDLE_IDENTIFIER': productBundleIdentifier ?? 'io.flutter.someProject',
       'TARGET_BUILD_DIR': 'build/ios/Release-iphoneos',
       'WRAPPER_NAME': 'Runner.app',
-      if (developmentTeam != null) 'DEVELOPMENT_TEAM': developmentTeam,
+      if (developmentTeam != null) 'DEVELOPMENT_TEAM': developmentTeam!,
     };
   }
 
   /// The value of 'PRODUCT_BUNDLE_IDENTIFIER'.
-  final String productBundleIdentifier;
+  final String? productBundleIdentifier;
 
-  final String developmentTeam;
+  final String? developmentTeam;
 }
 
 final Platform macosPlatform = FakePlatform(
@@ -59,8 +57,8 @@ final Platform notMacosPlatform = FakePlatform(
 );
 
 void main() {
-  FileSystem fileSystem;
-  TestUsage usage;
+  late FileSystem fileSystem;
+  late TestUsage usage;
 
   setUpAll(() {
     Cache.disableLocking();
@@ -90,7 +88,7 @@ void main() {
     'xattr', '-r', '-d', 'com.apple.FinderInfo', '/',
   ]);
 
-  FakeCommand setUpRsyncCommand({void Function() onRun}) {
+  FakeCommand setUpRsyncCommand({void Function()? onRun}) {
     return FakeCommand(
       command: const <String>[
         'rsync',
@@ -104,7 +102,7 @@ void main() {
     );
   }
 
-  FakeCommand setUpXCResultCommand({String stdout = '', void Function() onRun}) {
+  FakeCommand setUpXCResultCommand({String stdout = '', void Function()? onRun}) {
     return FakeCommand(
       command: const <String>[
         'xcrun',
@@ -125,10 +123,10 @@ void main() {
   FakeCommand setUpFakeXcodeBuildHandler({
     bool verbose = false,
     bool simulator = false,
-    String deviceId,
+    String? deviceId,
     int exitCode = 0,
-    String stdout,
-    void Function() onRun,
+    String? stdout,
+    void Function()? onRun,
   }) {
     return FakeCommand(
       command: <String>[

packages/flutter_tools/test/commands.shard/hermetic/build_ipa_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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
@@ -28,7 +26,7 @@ class FakeXcodeProjectInterpreterWithBuildSettings extends FakeXcodeProjectInter
   @override
   Future<Map<String, String>> getBuildSettings(
       String projectPath, {
-        XcodeProjectBuildContext buildContext,
+        XcodeProjectBuildContext? buildContext,
         Duration timeout = const Duration(minutes: 1),
       }) async {
     return <String, String>{
@@ -53,9 +51,9 @@ final Platform notMacosPlatform = FakePlatform(
 );
 
 void main() {
-  FileSystem fileSystem;
-  TestUsage usage;
-  FakeProcessManager fakeProcessManager;
+  late FileSystem fileSystem;
+  late TestUsage usage;
+  late FakeProcessManager fakeProcessManager;
 
   setUpAll(() {
     Cache.disableLocking();
@@ -86,7 +84,7 @@ void main() {
     'xattr', '-r', '-d', 'com.apple.FinderInfo', '/',
   ]);
 
-  FakeCommand setUpXCResultCommand({String stdout = '', void Function() onRun}) {
+  FakeCommand setUpXCResultCommand({String stdout = '', void Function()? onRun}) {
     return FakeCommand(
       command: const <String>[
         'xcrun',
@@ -104,7 +102,7 @@ void main() {
 
   // Creates a FakeCommand for the xcodebuild call to build the app
   // in the given configuration.
-  FakeCommand setUpFakeXcodeBuildHandler({ bool verbose = false, int exitCode = 0, void Function() onRun }) {
+  FakeCommand setUpFakeXcodeBuildHandler({ bool verbose = false, int exitCode = 0, void Function()? onRun }) {
     return FakeCommand(
       command: <String>[
         'xcrun',
@@ -134,7 +132,7 @@ void main() {
 
   FakeCommand exportArchiveCommand({
     String exportOptionsPlist =  '/ExportOptions.plist',
-    File cachePlist,
+    File? cachePlist,
   }) {
     return FakeCommand(
       command: <String>[

packages/flutter_tools/test/commands.shard/hermetic/build_linux_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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:file_testing/file_testing.dart';
@@ -45,9 +43,9 @@ void main() {
     Cache.disableLocking();
   });
 
-  FileSystem fileSystem;
-  ProcessManager processManager;
-  TestUsage usage;
+  late FileSystem fileSystem;
+  late ProcessManager processManager;
+  late TestUsage usage;
 
   setUp(() {
     fileSystem = MemoryFileSystem.test();
@@ -71,7 +69,7 @@ void main() {
   // Returns the command matching the build_linux call to cmake.
   FakeCommand cmakeCommand(String buildMode, {
     String target = 'x64',
-    void Function() onRun,
+    void Function()? onRun,
   }) {
     return FakeCommand(
       command: <String>[
@@ -89,9 +87,9 @@ void main() {
 
   // Returns the command matching the build_linux call to ninja.
   FakeCommand ninjaCommand(String buildMode, {
-    Map<String, String> environment,
+    Map<String, String>? environment,
     String target = 'x64',
-    void Function() onRun,
+    void Function()? onRun,
     String stdout = '',
   }) {
     return FakeCommand(

packages/flutter_tools/test/commands.shard/hermetic/build_macos_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:args/command_runner.dart';
@@ -29,7 +27,7 @@ import '../../src/test_flutter_command_runner.dart';
 
 class FakeXcodeProjectInterpreterWithProfile extends FakeXcodeProjectInterpreter {
   @override
-  Future<XcodeProjectInfo> getInfo(String projectPath, { String projectFilename }) async {
+  Future<XcodeProjectInfo> getInfo(String projectPath, { String? projectFilename }) async {
     return XcodeProjectInfo(
       <String>['Runner'],
       <String>['Debug', 'Profile', 'Release'],
@@ -62,10 +60,10 @@ final Platform notMacosPlatform = FakePlatform(
 );
 
 void main() {
-  FileSystem fileSystem;
-  TestUsage usage;
-  FakeProcessManager fakeProcessManager;
-  XcodeProjectInterpreter xcodeProjectInterpreter;
+  late FileSystem fileSystem;
+  late TestUsage usage;
+  late FakeProcessManager fakeProcessManager;
+  late XcodeProjectInterpreter xcodeProjectInterpreter;
 
   setUpAll(() {
     Cache.disableLocking();
@@ -93,7 +91,7 @@ void main() {
 
   // Creates a FakeCommand for the xcodebuild call to build the app
   // in the given configuration.
-  FakeCommand setUpFakeXcodeBuildHandler(String configuration, { bool verbose = false, void Function() onRun }) {
+  FakeCommand setUpFakeXcodeBuildHandler(String configuration, { bool verbose = false, void Function()? onRun }) {
     final FlutterProject flutterProject = FlutterProject.fromDirectory(fileSystem.currentDirectory);
     final Directory flutterBuildDir = fileSystem.directory(getMacOSBuildDirectory());
     return FakeCommand(

packages/flutter_tools/test/commands.shard/hermetic/build_test.dart

@@ -2,14 +2,12 @@
 // 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:args/command_runner.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/build.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
-import 'package:meta/meta.dart';
 
 import '../../src/common.dart';
 import '../../src/context.dart';
@@ -27,8 +25,8 @@ void main() {
         'combination with "--${FlutterOptions.kSplitDebugInfoOption}"'));
   });
   group('Fatal Logs', () {
-    FakeBuildCommand command;
-    MemoryFileSystem fs;
+    late FakeBuildCommand command;
+    late MemoryFileSystem fs;
 
     setUp(() {
       fs = MemoryFileSystem.test();
@@ -134,7 +132,7 @@ class FakeBuildCommand extends BuildCommand {
 }
 
 class FakeBuildSubcommand extends BuildSubCommand {
-  FakeBuildSubcommand({@required bool verboseHelp}) : super(verboseHelp: verboseHelp);
+  FakeBuildSubcommand({required super.verboseHelp});
 
   @override
   String get description => '';