use throwsXxx instead of throwsA(isA<Xxx>()) (#82328)

packages/flutter/test/cupertino/bottom_tab_bar_test.dart

@@ -39,7 +39,7 @@ Future<void> main() async {
           ),
         ],
       )),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('items.length'),

packages/flutter/test/cupertino/segmented_control_test.dart

@@ -94,7 +94,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('children.length'),
@@ -110,7 +110,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('children.length'),
@@ -220,7 +220,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('children'),

packages/flutter/test/cupertino/sliding_segmented_control_test.dart

@@ -82,7 +82,7 @@ void main() {
           onValueChanged: defaultCallback,
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('children.length'),
@@ -97,7 +97,7 @@ void main() {
           onValueChanged: defaultCallback,
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('children.length'),
@@ -117,7 +117,7 @@ void main() {
           onValueChanged: defaultCallback,
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains('groupValue must be either null or one of the keys in the children map'),

packages/flutter/test/material/dropdown_form_field_test.dart

@@ -588,7 +588,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains("There should be exactly one item with [DropdownButton]'s value"),
@@ -617,7 +617,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains("There should be exactly one item with [DropdownButton]'s value"),

packages/flutter/test/material/dropdown_test.dart

@@ -457,7 +457,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains("There should be exactly one item with [DropdownButton]'s value"),
@@ -486,7 +486,7 @@ void main() {
           ),
         ),
       ),
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.toString(),
         '.toString()',
         contains("There should be exactly one item with [DropdownButton]'s value"),

packages/flutter/test/material/toggle_buttons_test.dart

@@ -185,7 +185,7 @@ void main() {
             ),
           ),
         ),
-        throwsA(isA<AssertionError>().having(
+        throwsA(isAssertionError.having(
           (AssertionError error) => error.toString(),
           '.toString()',
           allOf(

packages/flutter/test/rendering/box_test.dart

@@ -980,7 +980,7 @@ void main() {
             },
           );
         },
-        throwsA(isA<AssertionError>().having(
+        throwsA(isAssertionError.having(
           (AssertionError error) => error.message,
           'message',
           'paintTransform must be invertible.',
@@ -996,7 +996,7 @@ void main() {
             },
           );
         },
-        throwsA(isA<AssertionError>().having(
+        throwsA(isAssertionError.having(
           (AssertionError error) => error.message,
           'message',
           'Exactly one transform or offset argument must be provided.',

packages/flutter/test/services/restoration_bucket_test.dart

@@ -183,7 +183,7 @@ void main() {
     // child1 is not given up before running finalizers.
     expect(
       () => manager.doSerialization(),
-      throwsA(isA<FlutterError>().having(
+      throwsA(isFlutterError.having(
         (FlutterError error) => error.message,
         'message',
         equals(

packages/flutter/test/widgets/grid_view_test.dart

@@ -768,7 +768,7 @@ void main() {
       child: GridView.extent(
         maxCrossAxisExtent: maxCrossAxisExtent,
       ),
-    ), throwsA(isA<AssertionError>()));
+    ), throwsAssertionError);
 
   });
 }

packages/flutter/test/widgets/list_wheel_scroll_view_test.dart

@@ -56,7 +56,7 @@ void main() {
           itemExtent: 20.0,
           children: const <Widget>[],
         ),
-        throwsA(isA<AssertionError>().having(
+        throwsA(isAssertionError.having(
           (AssertionError error) => error.message,
           'message',
           contains("You can't set a diameterRatio of 0"),

packages/flutter/test/widgets/page_view_test.dart

@@ -758,7 +758,7 @@ void main() {
     final PageController controller = PageController();
     expect(
       () => controller.page,
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.message,
         'message',
         equals('PageController.page cannot be accessed before a PageView is built with it.'),
@@ -792,7 +792,7 @@ void main() {
     );
     expect(
       () => controller.page,
-      throwsA(isA<AssertionError>().having(
+      throwsA(isAssertionError.having(
         (AssertionError error) => error.message,
         'message',
         equals('PageController.page cannot be accessed before a PageView is built with it.'),

packages/flutter_driver/test/src/real_tests/flutter_driver_test.dart

@@ -632,11 +632,11 @@ void main() {
 
     group('VMServiceFlutterDriver Unsupported error', () {
       test('enableAccessibility', () async {
-        expect(driver.enableAccessibility(), throwsA(isA<UnsupportedError>()));
+        expect(driver.enableAccessibility(), throwsUnsupportedError);
       });
 
       test('webDriver', () async {
-        expect(() => driver.webDriver, throwsA(isA<UnsupportedError>()));
+        expect(() => driver.webDriver, throwsUnsupportedError);
       });
     });
   });
@@ -913,28 +913,23 @@ void main() {
 
     group('WebFlutterDriver Unimplemented/Unsupported error', () {
       test('forceGC', () async {
-        expect(driver.forceGC(),
-            throwsA(isA<UnimplementedError>()));
+        expect(driver.forceGC(), throwsUnimplementedError);
       });
 
       test('getVmFlags', () async {
-        expect(driver.getVmFlags(),
-            throwsA(isA<UnimplementedError>()));
+        expect(driver.getVmFlags(), throwsUnimplementedError);
       });
 
       test('waitUntilFirstFrameRasterized', () async {
-        expect(driver.waitUntilFirstFrameRasterized(),
-            throwsA(isA<UnimplementedError>()));
+        expect(driver.waitUntilFirstFrameRasterized(), throwsUnimplementedError);
       });
 
       test('appIsoloate', () async {
-        expect(() => driver.appIsolate.extensionRPCs,
-            throwsA(isA<UnsupportedError>()));
+        expect(() => driver.appIsolate.extensionRPCs, throwsUnsupportedError);
       });
 
       test('serviceClient', () async {
-        expect(() => driver.serviceClient.getVM(),
-            throwsA(isA<UnsupportedError>()));
+        expect(() => driver.serviceClient.getVM(), throwsUnsupportedError);
       });
     });
   });
@@ -949,14 +944,10 @@ void main() {
     });
 
     test('tracing', () async {
-      expect(driver.traceAction(() async { return Future<dynamic>.value(); }),
-          throwsA(isA<UnsupportedError>()));
-      expect(driver.startTracing(),
-          throwsA(isA<UnsupportedError>()));
-      expect(driver.stopTracingAndDownloadTimeline(),
-          throwsA(isA<UnsupportedError>()));
-      expect(driver.clearTimeline(),
-          throwsA(isA<UnsupportedError>()));
+      expect(driver.traceAction(() async { return Future<dynamic>.value(); }), throwsUnsupportedError);
+      expect(driver.startTracing(), throwsUnsupportedError);
+      expect(driver.stopTracingAndDownloadTimeline(), throwsUnsupportedError);
+      expect(driver.clearTimeline(), throwsUnsupportedError);
     });
   });
 }

packages/flutter_driver/test/src/real_tests/io_extension_test.dart

@@ -17,8 +17,7 @@ void main() {
     });
 
     test('io_extension should throw exception', () {
-      expect(() => registerWebServiceExtension(call),
-          throwsA(isA<UnsupportedError>()));
+      expect(() => registerWebServiceExtension(call), throwsUnsupportedError);
     });
   });
 }

packages/flutter_test/test/goldens_test.dart

@@ -185,7 +185,7 @@ void main() {
           await fs.file(fix('/golden.png')).writeAsBytes(_kColorFailurePngBytes);
           await expectLater(
             () => doComparison(),
-            throwsA(isA<FlutterError>().having(
+            throwsA(isFlutterError.having(
               (FlutterError error) => error.message,
               'message',
               contains('% diff detected'),
@@ -216,7 +216,7 @@ void main() {
             ..writeAsBytesSync(_kColorFailurePngBytes);
           await expectLater(
             () => doComparison('subdir/golden.png'),
-            throwsA(isA<FlutterError>().having(
+            throwsA(isFlutterError.having(
               (FlutterError error) => error.message,
               'message',
               contains('% diff detected'),
@@ -255,7 +255,7 @@ void main() {
           await fs.file(fix('/golden.png')).writeAsBytes(_kSizeFailurePngBytes);
           await expectLater(
             () => doComparison(),
-            throwsA(isA<FlutterError>().having(
+            throwsA(isFlutterError.having(
               (FlutterError error) => error.message,
               'message',
               contains('image sizes do not match'),
@@ -267,7 +267,7 @@ void main() {
           await fs.file(fix('/golden.png')).writeAsBytes(_kColorFailurePngBytes);
           await expectLater(
             () => doComparison(),
-            throwsA(isA<FlutterError>().having(
+            throwsA(isFlutterError.having(
               (FlutterError error) => error.message,
               'message',
               contains('% diff detected'),
@@ -279,7 +279,7 @@ void main() {
           await fs.file(fix('/golden.png')).writeAsBytes(<int>[]);
           await expectLater(
             () => doComparison(),
-            throwsA(isA<FlutterError>().having(
+            throwsA(isFlutterError.having(
               (FlutterError error) => error.message,
               'message',
               contains('null image provided'),

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

@@ -5,9 +5,9 @@
 // @dart = 2.8
 
 import 'package:args/command_runner.dart';
-import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 
+import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';
 
@@ -19,7 +19,7 @@ void main() {
     expect(() => commandRunner.run(<String>[
       'build',
       '--obfuscate',
-    ]), throwsA(isA<ToolExit>()));
+    ]), throwsToolExit());
   });
 }
 

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

@@ -5,13 +5,13 @@
 // @dart = 2.8
 
 import 'package:file/memory.dart';
-import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/commands/generate_localizations.dart';
 import 'package:flutter_tools/src/runner/flutter_command.dart';
 
 import '../../integration.shard/test_data/basic_project.dart';
+import '../../src/common.dart';
 import '../../src/context.dart';
 import '../../src/test_flutter_command_runner.dart';
 
@@ -100,7 +100,7 @@ void main() {
         '--header="some header',
         '--header-file="header.txt"',
       ]),
-      throwsA(isA<ToolExit>()),
+      throwsToolExit(),
     );
   });
 

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

@@ -75,7 +75,7 @@ void main() {
           '--no-pub',
           '--show-test-device',
         ]),
-        throwsA(isA<Exception>().having(
+        throwsA(isException.having(
           (Exception exception) => exception.toString(),
           'toString',
           isNot(contains('--fast-start is not supported with --use-application-binary')),
@@ -102,7 +102,7 @@ void main() {
           'run',
           '--no-pub',
         ]),
-        throwsA(isA<ToolExit>()),
+        throwsToolExit(),
       );
       final BufferLogger bufferLogger = globals.logger as BufferLogger;
       expect(
@@ -127,11 +127,7 @@ void main() {
           'run',
           '--no-pub',
         ]),
-        throwsA(isA<ToolExit>().having(
-          (ToolExit error) => error.toString(),
-          'toString()',
-          contains('No pubspec.yaml file found'),
-        )),
+        throwsToolExit(message: 'No pubspec.yaml file found'),
       );
     }, overrides: <Type, Generator>{
       FileSystem: () => fileSystem,
@@ -510,7 +506,7 @@ void main() {
       'run',
       '--no-pub',
       '--bundle-sksl-path=foo.json',
-    ]), throwsA(isA<ToolExit>().having((ToolExit exit) => exit.message, 'message', contains('No SkSL shader bundle found at foo.json'))));
+    ]), throwsToolExit(message: 'No SkSL shader bundle found at foo.json'));
   });
 }
 

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

@@ -30,12 +30,12 @@ void main() {
 
       await expectLater(() => createTestCommandRunner(ScreenshotCommand())
         .run(<String>['screenshot', '--type=skia', '--observatory-url=http://localhost:8181']),
-        throwsA(isA<Exception>().having((dynamic exception) => exception.toString(), 'message', contains('dummy'))),
+        throwsA(isException.having((Exception exception) => exception.toString(), 'message', contains('dummy'))),
       );
 
       await expectLater(() => createTestCommandRunner(ScreenshotCommand())
         .run(<String>['screenshot', '--type=rasterizer', '--observatory-url=http://localhost:8181']),
-        throwsA(isA<Exception>().having((dynamic exception) => exception.toString(), 'message', contains('dummy'))),
+        throwsA(isException.having((Exception exception) => exception.toString(), 'message', contains('dummy'))),
       );
     });
 

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

@@ -211,8 +211,7 @@ dev_dependencies:
       '--coverage',
       '--',
       'test/fake_test.dart',
-    ]), throwsA(isA<ToolExit>()
-      .having((ToolExit toolExit) => toolExit.message, 'message', isNull)));
+    ]), throwsA(isA<ToolExit>().having((ToolExit toolExit) => toolExit.message, 'message', isNull)));
   }, overrides: <Type, Generator>{
     FileSystem: () => fs,
     ProcessManager: () => FakeProcessManager.any(),

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

@@ -5,7 +5,6 @@
 // @dart = 2.8
 
 import 'package:flutter_tools/src/android/android_device.dart';
-import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/device_port_forwarder.dart';
 
@@ -78,7 +77,7 @@ void main() {
       logger: BufferLogger.test(),
     );
 
-    expect(forwarder.forward(123, hostPort: 456), throwsA(isA<ProcessException>()));
+    expect(forwarder.forward(123, hostPort: 456), throwsProcessException());
   });
 
   testWithoutContext('AndroidDevicePortForwarder forwardedPorts returns empty '
@@ -159,6 +158,6 @@ void main() {
       logger: BufferLogger.test(),
     );
 
-    expect(() => forwarder.unforward(ForwardedPort(456, 23)), throwsA(isA<ProcessException>()));
+    expect(() => forwarder.unforward(ForwardedPort(456, 23)), throwsProcessException());
   });
 }

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

@@ -358,7 +358,7 @@ void main() {
         ..writeAsStringSync('apply from: irrelevant/flutter.gradle');
 
       await expectLater(() async {
-       await builder.buildGradleApp(
+        await builder.buildGradleApp(
           project: FlutterProject.fromDirectoryTest(fileSystem.currentDirectory),
           androidBuildInfo: const AndroidBuildInfo(
             BuildInfo(
@@ -371,8 +371,7 @@ void main() {
           isBuildingBundle: false,
           localGradleErrors: const <GradleHandledError>[],
         );
-      },
-      throwsA(isA<ProcessException>()));
+      }, throwsProcessException());
       expect(processManager, hasNoRemainingExpectations);
     });
 

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

@@ -4,7 +4,6 @@
 
 import 'package:file/memory.dart';
 import 'package:file_testing/file_testing.dart';
-import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
@@ -288,7 +287,7 @@ void main() {
       'test message',
       Uri.parse('http://test.zip'),
       fileSystem.currentDirectory.childDirectory('out'),
-    ), throwsA(isA<ArgumentError>()));
+    ), throwsArgumentError);
 
     expect(logger.statusText, contains('test message'));
     expect(fileSystem.file('out/test'), isNot(exists));
@@ -361,7 +360,7 @@ void main() {
       'test message',
       Uri.parse('http://test.zip'),
       fileSystem.currentDirectory.childDirectory('out'),
-    ), throwsA(isA<ToolExit>()));
+    ), throwsToolExit());
     expect(fileSystem.file('te,[/test'), isNot(exists));
     expect(fileSystem.file('out/test'), isNot(exists));
   });
@@ -385,7 +384,7 @@ void main() {
       'test message',
       Uri.parse('http://test.zip'),
       fileSystem.currentDirectory.childDirectory('out'),
-    ), throwsA(isA<ToolExit>()));
+    ), throwsToolExit());
     expect(fileSystem.file('te,[/test'), isNot(exists));
     expect(fileSystem.file('out/test'), isNot(exists));
   });

packages/flutter_tools/test/general.shard/base/common_test.dart

@@ -26,7 +26,7 @@ void main() {
     });
 
     testWithoutContext('Throws if accessing the Zone', () {
-      expect(() => context.get<Object>(), throwsA(isA<UnsupportedError>()));
+      expect(() => context.get<Object>(), throwsUnsupportedError);
     });
   });
 }

packages/flutter_tools/test/general.shard/base/error_handling_io_test.dart

@@ -168,7 +168,7 @@ void main() {
     when(file.deleteSync(recursive: false))
       .thenThrow(const FileSystemException('', '', OSError('', 2)));
 
-    expect(() => ErrorHandlingFileSystem.deleteIfExists(file), throwsA(isA<ToolExit>()));
+    expect(() => ErrorHandlingFileSystem.deleteIfExists(file), throwsToolExit());
   });
 
   testWithoutContext('deleteIfExists does not tool exit if file exists on read-only '
@@ -182,7 +182,7 @@ void main() {
       ErrorHandlingFileSystem.noExitOnFailure(() {
         ErrorHandlingFileSystem.deleteIfExists(file);
       });
-    }, throwsA(isA<FileSystemException>()));
+    }, throwsFileSystemException());
   });
 
   group('throws ToolExit on Windows', () {
@@ -213,7 +213,7 @@ void main() {
       final File file = fs.file('file');
 
       expect(() => ErrorHandlingFileSystem.noExitOnFailure(
-        () => file.writeAsStringSync('')), throwsA(isA<Exception>()));
+        () => file.writeAsStringSync('')), throwsException);
 
       // nesting does not unconditionally re-enable errors.
       expect(() {
@@ -221,10 +221,10 @@ void main() {
           ErrorHandlingFileSystem.noExitOnFailure(() { });
           file.writeAsStringSync('');
         });
-      }, throwsA(isA<Exception>()));
+      }, throwsException);
 
       // Check that state does not leak.
-      expect(() => file.writeAsStringSync(''), throwsA(isA<ToolExit>()));
+      expect(() => file.writeAsStringSync(''), throwsToolExit());
     });
 
     testWithoutContext('when access is denied', () async {

packages/flutter_tools/test/general.shard/base/logger_test.dart

@@ -227,7 +227,7 @@ void main() {
 
     expect(
       () => asLogger<AppRunLogger>(notifyingLogger),
-      throwsA(isA<StateError>()),
+      throwsStateError,
     );
   });
 
@@ -335,8 +335,8 @@ void main() {
     logger.printStatus('message');
     logger.printError('error message');
 
-    expect(() async => stdout.done, throwsA(isA<Exception>()));
-    expect(() async => stderr.done, throwsA(isA<Exception>()));
+    expect(() async => stdout.done, throwsException);
+    expect(() async => stderr.done, throwsException);
   });
 
   group('Spinners', () {

packages/flutter_tools/test/general.shard/base/os_test.dart

@@ -4,7 +4,6 @@
 
 import 'package:file/file.dart';
 import 'package:file/memory.dart';
-import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/os.dart';
@@ -100,7 +99,7 @@ void main() {
         processManager: fakeProcessManager,
       );
 
-      expect(() => utils.which(kExecutable), throwsA(isA<ToolExit>()));
+      expect(() => utils.which(kExecutable), throwsToolExit());
     });
 
     testWithoutContext('returns null when executable does not exist', () async {

packages/flutter_tools/test/general.shard/base/process_test.dart

@@ -35,8 +35,7 @@ void main() {
         exitCode: 1,
       ));
 
-      expect(() async => processUtils.run(<String>['false'], throwOnError: true),
-             throwsA(isA<ProcessException>()));
+      expect(() async => processUtils.run(<String>['false'], throwOnError: true), throwsProcessException());
     });
   });
 
@@ -124,8 +123,7 @@ void main() {
         ],
         exitCode: 1,
       ));
-      expect(() => processUtils.run(<String>['kaboom'], throwOnError: true),
-             throwsA(isA<ProcessException>()));
+      expect(() => processUtils.run(<String>['kaboom'], throwOnError: true), throwsProcessException());
     });
 
     testWithoutContext(' does not throw on allowed Failures', () async {
@@ -158,7 +156,7 @@ void main() {
           throwOnError: true,
           allowedFailures: (int c) => c == 1,
         ),
-        throwsA(isA<ProcessException>()),
+        throwsProcessException(),
       );
     });
   });
@@ -269,7 +267,8 @@ void main() {
           throwOnError: true,
           allowedFailures: (int c) => c == 1,
         ),
-        throwsA(isA<ProcessException>()));
+        throwsProcessException(),
+      );
     });
 
     testWithoutContext(' prints stdout and stderr to trace on success', () async {
@@ -294,8 +293,7 @@ void main() {
         stdout: 'stdout',
         stderr: 'stderr',
       ));
-      expect(() => processUtils.runSync(<String>['kaboom'], throwOnError: true),
-             throwsA(isA<ProcessException>()));
+      expect(() => processUtils.runSync(<String>['kaboom'], throwOnError: true), throwsProcessException());
       expect(testLogger.statusText, contains('stdout'));
       expect(testLogger.errorText, contains('stderr'));
     });

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

@@ -110,8 +110,7 @@ flutter:
 
 ''');
 
-    expect(() async => const CopyAssets().build(environment),
-      throwsA(isA<Exception>()));
+    expect(() async => const CopyAssets().build(environment), throwsException);
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
     ProcessManager: () => FakeProcessManager.any(),
@@ -138,7 +137,7 @@ flutter:
       fileSystem: MemoryFileSystem.test(),
       logger: BufferLogger.test(),
       engineVersion: null,
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
   });
 
   testWithoutContext('processSkSLBundle throws exception if the bundle is not '
@@ -154,7 +153,7 @@ flutter:
       fileSystem: fileSystem,
       logger: logger,
       engineVersion: null,
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
     expect(logger.errorText, contains('was not a JSON object'));
   });
 
@@ -171,7 +170,7 @@ flutter:
       fileSystem: fileSystem,
       logger: logger,
       engineVersion: null,
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
     expect(logger.errorText, contains('was not a JSON object'));
   });
 
@@ -192,7 +191,7 @@ flutter:
       fileSystem: fileSystem,
       logger: logger,
       engineVersion: '2',
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
     expect(logger.errorText, contains('Expected Flutter 1, but found 2'));
   });
 

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

@@ -104,8 +104,7 @@ void main() {
       ], exitCode: 1),
     ]);
 
-    await expectLater(() => const KernelSnapshot().build(androidEnvironment),
-      throwsA(isA<Exception>()));
+    await expectLater(() => const KernelSnapshot().build(androidEnvironment), throwsException);
     expect(processManager, hasNoRemainingExpectations);
   });
 
@@ -434,8 +433,7 @@ void main() {
   });
 
   testUsingContext('AotAssemblyProfile throws error if built for non-iOS platform', () async {
-    expect(const AotAssemblyProfile().build(androidEnvironment),
-      throwsA(isA<Exception>()));
+    expect(const AotAssemblyProfile().build(androidEnvironment), throwsException);
   }, overrides: <Type, Generator>{
     Platform: () => macPlatform,
     FileSystem: () => fileSystem,

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

@@ -64,7 +64,7 @@ void main() {
         'a.txt',
       ],
       clientSourcePaths: <String>['foo'],
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
   });
 
   testWithoutContext('unpackDesktopArtifacts throws when attempting to copy missing directory', () async {
@@ -79,7 +79,7 @@ void main() {
         'a.txt',
       ],
       clientSourcePaths: <String>['foo'],
-    ), throwsA(isA<Exception>()));
+    ), throwsException);
   });
 
   testWithoutContext('unpackDesktopArtifacts does not require a client source path', () async {

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

@@ -225,7 +225,7 @@ void main() {
       fileSystem: fileSystem,
     );
 
-    expect(const AotAssemblyRelease().build(environment), throwsA(isA<Exception>()
+    expect(const AotAssemblyRelease().build(environment), throwsA(isException
       .having(
         (Exception exception) => exception.toString(),
         'description',
@@ -254,13 +254,11 @@ void main() {
     environment.defines[kBuildMode] = 'release';
     environment.defines[kIosArchs] = 'x86_64';
 
-    expect(const AotAssemblyRelease().build(environment), throwsA(isA<Exception>()
-        .having(
-          (Exception exception) => exception.toString(),
+    expect(const AotAssemblyRelease().build(environment), throwsA(isException.having(
+      (Exception exception) => exception.toString(),
       'description',
       contains('required define SdkRoot but it was not provided'),
-    )
-    ));
+    )));
     expect(processManager.hasRemainingExpectations, isFalse);
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
@@ -371,7 +369,7 @@ void main() {
       processManager.addCommand(copyPhysicalFrameworkCommand);
       await expectLater(
         const DebugUnpackIOS().build(environment),
-        throwsA(isA<Exception>().having(
+        throwsA(isException.having(
           (Exception exception) => exception.toString(),
           'description',
           contains('Flutter.framework/Flutter does not exist, cannot thin'),
@@ -412,12 +410,13 @@ void main() {
       ]);
 
       await expectLater(
-          const DebugUnpackIOS().build(environment),
-          throwsA(isA<Exception>().having(
-                (Exception exception) => exception.toString(),
-            'description',
-            contains('does not contain arm64 armv7. Running lipo -info:\nArchitectures in the fat file:'),
-          )));
+        const DebugUnpackIOS().build(environment),
+        throwsA(isException.having(
+          (Exception exception) => exception.toString(),
+          'description',
+          contains('does not contain arm64 armv7. Running lipo -info:\nArchitectures in the fat file:'),
+        )),
+      );
     });
 
     testWithoutContext('fails when lipo extract fails', () async {
@@ -466,11 +465,12 @@ void main() {
 
       await expectLater(
         const DebugUnpackIOS().build(environment),
-        throwsA(isA<Exception>().having(
-              (Exception exception) => exception.toString(),
+        throwsA(isException.having(
+          (Exception exception) => exception.toString(),
           'description',
           contains('Failed to extract arm64 armv7 for output/Flutter.framework/Flutter.\nlipo error\nRunning lipo -info:\nArchitectures in the fat file:'),
-        )));
+        )),
+      );
     });
 
     testWithoutContext('skips thin framework', () async {
@@ -581,12 +581,13 @@ void main() {
       ]);
 
       await expectLater(
-          const DebugUnpackIOS().build(environment),
-          throwsA(isA<Exception>().having(
-                (Exception exception) => exception.toString(),
-            'description',
-            contains('Failed to strip bitcode for output/Flutter.framework/Flutter.\nbitcode_strip error'),
-          )));
+        const DebugUnpackIOS().build(environment),
+        throwsA(isException.having(
+          (Exception exception) => exception.toString(),
+          'description',
+          contains('Failed to strip bitcode for output/Flutter.framework/Flutter.\nbitcode_strip error'),
+        )),
+      );
 
       expect(processManager.hasRemainingExpectations, isFalse);
     });
@@ -653,12 +654,13 @@ void main() {
       ]);
 
       await expectLater(
-          const DebugUnpackIOS().build(environment),
-          throwsA(isA<Exception>().having(
-                (Exception exception) => exception.toString(),
-            'description',
-            contains('Failed to codesign output/Flutter.framework/Flutter with identity ABC123.\ncodesign error'),
-          )));
+        const DebugUnpackIOS().build(environment),
+        throwsA(isException.having(
+          (Exception exception) => exception.toString(),
+          'description',
+          contains('Failed to codesign output/Flutter.framework/Flutter with identity ABC123.\ncodesign error'),
+        )),
+      );
 
       expect(processManager.hasRemainingExpectations, isFalse);
     });

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

@@ -96,7 +96,7 @@ use-deferred-loading: string
         file: configFile,
         logger: BufferLogger.test(),
       ),
-      throwsA(isA<Exception>()),
+      throwsException,
     );
   });
 }

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

@@ -105,12 +105,13 @@ void main() {
   testUsingContext('thinning fails when framework missing', () async {
     processManager.addCommand(copyFrameworkCommand);
     await expectLater(
-        const DebugUnpackMacOS().build(environment),
-        throwsA(isA<Exception>().having(
-          (Exception exception) => exception.toString(),
-          'description',
-          contains('FlutterMacOS.framework/FlutterMacOS does not exist, cannot thin'),
-        )));
+      const DebugUnpackMacOS().build(environment),
+      throwsA(isException.having(
+        (Exception exception) => exception.toString(),
+        'description',
+        contains('FlutterMacOS.framework/FlutterMacOS does not exist, cannot thin'),
+      )),
+    );
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
     ProcessManager: () => processManager,
@@ -132,12 +133,13 @@ void main() {
     ]);
 
     await expectLater(
-        const DebugUnpackMacOS().build(environment),
-        throwsA(isA<Exception>().having(
-          (Exception exception) => exception.toString(),
-          'description',
-          contains('does not contain arm64 x86_64. Running lipo -info:\nArchitectures in the fat file:'),
-        )));
+      const DebugUnpackMacOS().build(environment),
+      throwsA(isException.having(
+        (Exception exception) => exception.toString(),
+        'description',
+        contains('does not contain arm64 x86_64. Running lipo -info:\nArchitectures in the fat file:'),
+      )),
+    );
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
     ProcessManager: () => processManager,

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

@@ -290,7 +290,7 @@ void main() {
       );
       await expectLater(
         () => cache.updateAll(<DevelopmentArtifact>{null}),
-        throwsA(isA<Exception>()),
+        throwsException,
       );
       verify(artifact1.update(any, any, any, any));
       // Don't continue when retrieval fails.

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

@@ -7,7 +7,6 @@
 import 'dart:async';
 
 import 'package:fake_async/fake_async.dart';
-import 'package:flutter_tools/src/base/common.dart';
 import 'package:flutter_tools/src/base/io.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/terminal.dart';
@@ -336,7 +335,7 @@ void main() {
       );
       await expectLater(
         () async => deviceManager.findTargetDevices(FakeFlutterProject()),
-        throwsA(isA<ToolExit>())
+        throwsToolExit(),
       );
     });
 

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

@@ -516,8 +516,8 @@ void main() {
         );
         when(mockXcdevice.isInstalled).thenReturn(false);
         expect(
-            () async { await iosDevices.pollingGetDevices(); },
-            throwsA(isA<UnsupportedError>()),
+          () async { await iosDevices.pollingGetDevices(); },
+          throwsUnsupportedError,
         );
       });
     }

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

@@ -214,7 +214,7 @@ void main() {
       );
       expect(
         () async => portDiscovery.query(),
-        throwsA(isA<Exception>()),
+        throwsException,
       );
     });
 

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

@@ -114,7 +114,7 @@ void main() {
       usage: TestUsage(),
     );
 
-    expect(() async => residentWebRunner.run(), throwsA(isA<Exception>()));
+    expect(() async => residentWebRunner.run(), throwsException);
     expect(await residentWebRunner.waitForAppToFinish(), 1);
   }, overrides: <Type, Generator>{
     BuildSystem: () => TestBuildSystem.error(Exception('foo')),

packages/flutter_tools/test/general.shard/runner/flutter_command_test.dart

@@ -212,7 +212,7 @@ void main() {
       );
       await expectLater(
         () => flutterCommand.run(),
-        throwsA(isA<ToolExit>()),
+        throwsToolExit(),
       );
       expect(usage.events, <TestUsageEvent>[
         const TestUsageEvent(
@@ -436,7 +436,7 @@ void main() {
 
       await expectLater(
         () => flutterCommand.run(),
-        throwsA(isA<ToolExit>()),
+        throwsToolExit(),
       );
       expect(usage.timings, contains(
         const TestTimingEvent(

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

@@ -96,7 +96,7 @@ void main() {
         ProcessUtils: () => null,
       });
 
-      expect(() => testbed.run(() {}), throwsA(isA<StateError>()));
+      expect(() => testbed.run(() {}), throwsStateError);
     });
   });
 }