Add tag support for executing reduced test sets (#86821)

dev/bots/analyze.dart

@@ -23,6 +23,7 @@ import 'utils.dart';
 
 final String flutterRoot = path.dirname(path.dirname(path.dirname(path.fromUri(Platform.script))));
 final String flutter = path.join(flutterRoot, 'bin', Platform.isWindows ? 'flutter.bat' : 'flutter');
+final String flutterPackages = path.join(flutterRoot, 'packages');
 final String dart = path.join(flutterRoot, 'bin', 'cache', 'dart-sdk', 'bin', Platform.isWindows ? 'dart.exe' : 'dart');
 final String pub = path.join(flutterRoot, 'bin', 'cache', 'dart-sdk', 'bin', Platform.isWindows ? 'pub.bat' : 'pub');
 final String pubCache = path.join(flutterRoot, '.pub-cache');
@@ -65,6 +66,9 @@ Future<void> run(List<String> arguments) async {
   print('$clock Deprecations...');
   await verifyDeprecations(flutterRoot);
 
+  print('$clock Goldens...');
+  await verifyGoldenTags(flutterPackages);
+
   print('$clock Skip test comments...');
   await verifySkipTestComments(flutterRoot);
 
@@ -146,6 +150,72 @@ Future<void> run(List<String> arguments) async {
 
 // TESTS
 
+final RegExp _findGoldenTestPattern = RegExp(r'matchesGoldenFile\(');
+final RegExp _findGoldenDefinitionPattern = RegExp(r'matchesGoldenFile\(Object');
+final RegExp _leadingComment = RegExp(r'\/\/');
+final RegExp _goldenTagPattern1 = RegExp(r'@Tags\(');
+final RegExp _goldenTagPattern2 = RegExp(r"'reduced-test-set'");
+
+/// Only golden file tests in the flutter package are subject to reduced testing,
+/// for example, invocations in flutter_test to validate comparator
+/// functionality do not require tagging.
+const String _ignoreGoldenTag = '// flutter_ignore: golden_tag (see analyze.dart)';
+const String _ignoreGoldenTagForFile = '// flutter_ignore_for_file: golden_tag (see analyze.dart)';
+
+Future<void> verifyGoldenTags(String workingDirectory, { int minimumMatches = 2000 }) async {
+  final List<String> errors = <String>[];
+  await for (final File file in _allFiles(workingDirectory, 'dart', minimumMatches: minimumMatches)) {
+    bool needsTag = false;
+    bool hasTagNotation = false;
+    bool hasReducedTag = false;
+    bool ignoreForFile = false;
+    final List<String> lines = file.readAsLinesSync();
+    for (final String line in lines) {
+      if (line.contains(_goldenTagPattern1)) {
+        hasTagNotation = true;
+      }
+      if (line.contains(_goldenTagPattern2)) {
+        hasReducedTag = true;
+      }
+      if (line.contains(_findGoldenTestPattern)
+          && !line.contains(_findGoldenDefinitionPattern)
+          && !line.contains(_leadingComment)
+          && !line.contains(_ignoreGoldenTag)) {
+        needsTag = true;
+      }
+      if (line.contains(_ignoreGoldenTagForFile)) {
+        ignoreForFile = true;
+      }
+      // If the file is being ignored or a reduced test tag is already accounted
+      // for, skip parsing the rest of the lines for golden file tests.
+      if (ignoreForFile || (hasTagNotation && hasReducedTag)) {
+        break;
+      }
+    }
+    // If a reduced test tag is already accounted for, move on to the next file.
+    if (ignoreForFile || (hasTagNotation && hasReducedTag)) {
+      continue;
+    }
+    // If there are golden file tests, ensure they are tagged for all reduced
+    // test environments.
+    if (needsTag) {
+      if (!hasTagNotation) {
+        errors.add('${file.path}: Files containing golden tests must be tagged using '
+            '`@Tags(...)` at the top of the file before import statements.');
+      } else if (!hasReducedTag) {
+        errors.add('${file.path}: Files containing golden tests must be tagged with '
+            "'reduced-test-set'.");
+      }
+    }
+  }
+  if (errors.isNotEmpty) {
+    exitWithError(<String>[
+      ...errors,
+      '${bold}See: https://github.com/flutter/flutter/wiki/Writing-a-golden-file-test-for-package:flutter$reset',
+    ]);
+  }
+}
+
 final RegExp _findDeprecationPattern = RegExp(r'@[Dd]eprecated');
 final RegExp _deprecationPattern1 = RegExp(r'^( *)@Deprecated\($'); // flutter_ignore: deprecation_syntax (see analyze.dart)
 final RegExp _deprecationPattern2 = RegExp(r"^ *'(.+) '$");

dev/bots/test.dart

@@ -1565,10 +1565,18 @@ Future<void> _runFlutterTest(String workingDirectory, {
 }) async {
   assert(!printOutput || outputChecker == null, 'Output either can be printed or checked but not both');
 
+  final List<String> tags = <String>[];
+  // Recipe configured reduced test shards will only execute tests with the
+  // appropriate tag.
+  if ((Platform.environment['REDUCED_TEST_SET'] ?? 'False') == 'True') {
+    tags.addAll(<String>['-t', 'reduced-test-set']);
+  }
+
   final List<String> args = <String>[
     'test',
     if (shuffleTests) '--test-randomize-ordering-seed=$shuffleSeed',
     ...options,
+    ...tags,
     ...flutterTestArgs,
   ];
 

dev/bots/test/analyze-test-input/root/packages/foo/golden_class.dart

@@ -0,0 +1,9 @@
+// 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.
+
+/// Mack class definition for testing.
+/// Should not be tag-enforced, no analysis failures should be found.
+void matchesGoldenFile(Object key) {
+  return;
+}

dev/bots/test/analyze-test-input/root/packages/foo/golden_doc.dart

@@ -0,0 +1,42 @@
+// 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.
+
+/// Sample Code
+///
+/// Should not be tag-enforced, no analysis failures should be found.
+///
+/// {@tool snippet}
+/// Sample invocations of [matchesGoldenFile].
+///
+/// ```dart
+/// await expectLater(
+///   find.text('Save'),
+///   matchesGoldenFile('save.png'),
+/// );
+///
+/// await expectLater(
+///   image,
+///   matchesGoldenFile('save.png'),
+/// );
+///
+/// await expectLater(
+///   imageFuture,
+///   matchesGoldenFile(
+///     'save.png',
+///     version: 2,
+///   ),
+/// );
+///
+/// await expectLater(
+///   find.byType(MyWidget),
+///   matchesGoldenFile('goldens/myWidget.png'),
+/// );
+/// ```
+/// {@end-tool}
+///
+
+// Other comments
+// matchesGoldenFile('comment.png');
+
+String literal = 'matchesGoldenFile()'; // flutter_ignore: golden_tag (see analyze.dart)

dev/bots/test/analyze-test-input/root/packages/foo/golden_ignore.dart

@@ -0,0 +1,16 @@
+// 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.
+
+// This would fail analysis, but it is ignored
+// flutter_ignore_for_file: golden_tag (see analyze.dart)
+
+@Tags(<String>['some-other-tag'])
+
+import 'package:test/test.dart';
+
+import 'golden_class.dart';
+
+void main() {
+  matchesGoldenFile('missing_tag.png');
+}

dev/bots/test/analyze-test-input/root/packages/foo/golden_missing_tag.dart

@@ -0,0 +1,14 @@
+// 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.
+
+// The reduced test set tag is missing. This should fail analysis.
+@Tags(<String>['some-other-tag'])
+
+import 'package:test/test.dart';
+
+import 'golden_class.dart';
+
+void main() {
+  matchesGoldenFile('missing_tag.png');
+}

dev/bots/test/analyze-test-input/root/packages/foo/golden_no_tag.dart

@@ -0,0 +1,11 @@
+// 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.
+
+// The tag is missing. This should fail analysis.
+
+import 'golden_class.dart';
+
+void main() {
+  matchesGoldenFile('missing_tag.png');
+}

dev/bots/test/analyze_test.dart

@@ -73,6 +73,51 @@ void main() {
     );
   });
 
+  test('analyze.dart - verifyGoldenTags', () async {
+    final String result = await capture(() => verifyGoldenTags(testRootPath, minimumMatches: 6), exitCode: 1);
+    const String noTag = 'Files containing golden tests must be '
+        'tagged using `@Tags(...)` at the top of the file before import statements.';
+    const String missingTag = 'Files containing golden tests must be '
+        "tagged with 'reduced-test-set'.";
+    String lines = <String>[
+        'test/analyze-test-input/root/packages/foo/golden_missing_tag.dart: $missingTag',
+        'test/analyze-test-input/root/packages/foo/golden_no_tag.dart: $noTag',
+      ]
+      .map((String line) {
+        return line
+          .replaceAll('/', Platform.isWindows ? r'\' : '/');
+      })
+      .join('\n');
+
+    try {
+      expect(
+        result,
+        '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n'
+        '$lines\n'
+        'See: https://github.com/flutter/flutter/wiki/Writing-a-golden-file-test-for-package:flutter\n'
+        '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n'
+      );
+    } catch (_) {
+      // This list of files may come up in one order or the other.
+      lines = <String>[
+        'test/analyze-test-input/root/packages/foo/golden_no_tag.dart: $noTag',
+        'test/analyze-test-input/root/packages/foo/golden_missing_tag.dart: $missingTag',
+      ]
+      .map((String line) {
+        return line
+          .replaceAll('/', Platform.isWindows ? r'\' : '/');
+      })
+      .join('\n');
+      expect(
+        result,
+        '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n'
+        '$lines\n'
+        'See: https://github.com/flutter/flutter/wiki/Writing-a-golden-file-test-for-package:flutter\n'
+        '━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n'
+      );
+    }
+  });
+
   test('analyze.dart - verifyNoMissingLicense', () async {
     final String result = await capture(() => verifyNoMissingLicense(testRootPath, checkMinimums: false), exitCode: 1);
     final String lines = 'test/analyze-test-input/root/packages/foo/foo.dart'

packages/flutter/dart_test.yaml

@@ -1,4 +1,7 @@
 tags:
+  # This tag tells the test framework to run these tagged files as part of a
+  # reduced test set.
+  reduced-test-set:
   # This tag tells the test framework to not shuffle the test order according to
   # the --test-randomize-ordering-seed for the suites that have this tag.
   no-shuffle:

packages/flutter/test/animation/animation_sheet_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/animation/live_binding_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/cupertino/activity_indicator_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/cupertino/date_picker_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=123"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'dart:ui';
 

packages/flutter/test/cupertino/dialog_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:math';
 
 import 'package:flutter/cupertino.dart';

packages/flutter/test/cupertino/nav_bar_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';

packages/flutter/test/cupertino/segmented_control_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:ui' as ui;
 
 import 'package:flutter/cupertino.dart';

packages/flutter/test/cupertino/switch_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';

packages/flutter/test/cupertino/text_field_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=123"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'dart:ui' as ui show BoxHeightStyle, BoxWidthStyle, Color;
 

packages/flutter/test/cupertino/text_selection_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:ui' as ui show BoxHeightStyle;
 
 import 'package:flutter/cupertino.dart';

packages/flutter/test/material/bottom_app_bar_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/material/bottom_app_bar_theme_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/material/bottom_navigation_bar_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:ui';
 
 import 'package:flutter/material.dart';

packages/flutter/test/material/card_theme_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/material/circle_avatar_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';

packages/flutter/test/material/dialog_theme_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/material/dropdown_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=1408669812"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'dart:math' as math;
 import 'dart:ui' show window;

packages/flutter/test/material/flexible_space_bar_stretch_mode_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/material/floating_action_button_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 @TestOn('!chrome')
 import 'dart:ui';
 

packages/flutter/test/material/flutter_logo_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/material/icons_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:file/file.dart';
 import 'package:file/local.dart';
 import 'package:flutter/material.dart';

packages/flutter/test/material/input_decorator_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';

packages/flutter/test/material/material_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/material/progress_indicator_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=456"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';

packages/flutter/test/material/radio_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:ui';
 
 import 'package:flutter/foundation.dart';

packages/flutter/test/material/reorderable_list_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';

packages/flutter/test/material/snack_bar_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/foundation.dart' show FlutterExceptionHandler;
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';

packages/flutter/test/material/switch_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:async';
 import 'dart:ui' as ui;
 

packages/flutter/test/material/tab_bar_theme_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/material/text_field_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=3890307731"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'dart:math' as math;
 import 'dart:ui' as ui show window, BoxHeightStyle, BoxWidthStyle, WindowPadding;

packages/flutter/test/material/text_selection_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';

packages/flutter/test/material/toggle_buttons_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';

packages/flutter/test/painting/box_painter_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/painting.dart';
 import 'package:flutter/widgets.dart';

packages/flutter/test/painting/continuous_rectangle_border_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/painting/flutter_logo_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/painting/gradient_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:math' as math;
 
 import 'package:flutter/widgets.dart';

packages/flutter/test/rendering/localized_fonts_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/backdrop_filter_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:ui';
 
 import 'package:flutter/material.dart';

packages/flutter/test/widgets/basic_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:math' as math;
 import 'dart:ui' as ui;
 

packages/flutter/test/widgets/clip_test.dart

@@ -2,11 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=456"
-@Tags(<String>['no-shuffle'])
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';

packages/flutter/test/widgets/color_filter_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 @TestOn('!chrome')
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';

packages/flutter/test/widgets/container_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/editable_text_cursor_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 @TestOn('!chrome')
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';

packages/flutter/test/widgets/image_filter_quality_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:async';
 import 'dart:typed_data';
 import 'dart:ui' as ui;

packages/flutter/test/widgets/image_filter_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:typed_data';
 import 'dart:ui';
 

packages/flutter/test/widgets/image_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:async';
 import 'dart:math' as math;
 import 'dart:typed_data';

packages/flutter/test/widgets/invert_colors_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/list_wheel_scroll_view_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/opacity_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/overscroll_stretch_indicator_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/page_route_builder_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/physical_model_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/selectable_text_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 @TestOn('!chrome')
 import 'dart:ui' as ui show BoxHeightStyle, BoxWidthStyle;
 

packages/flutter/test/widgets/shader_mask_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/shadow_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 

packages/flutter/test/widgets/text_golden_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 @TestOn('!chrome')
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';

packages/flutter/test/widgets/transform_test.dart

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// This file is run as part of a reduced test set in CI on Mac and Windows
+// machines.
+@Tags(<String>['reduced-test-set'])
+
 import 'dart:math' as math;
 import 'dart:ui' as ui;
 

packages/flutter/test/widgets/widget_inspector_test.dart

@@ -2,13 +2,17 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-@TestOn('!chrome')
+// no-shuffle:
+//   //TODO(gspencergoog): Remove this tag once this test's state leaks/test
+//   dependencies have been fixed.
+//   https://github.com/flutter/flutter/issues/85160
+//   Fails with "flutter test --test-randomize-ordering-seed=456"
+// reduced-test-set:
+//   This file is run as part of a reduced test set in CI on Mac and Windows
+//   machines.
+@Tags(<String>['reduced-test-set', 'no-shuffle'])
 
-// TODO(gspencergoog): Remove this tag once this test's state leaks/test
-// dependencies have been fixed.
-// https://github.com/flutter/flutter/issues/85160
-// Fails with "flutter test --test-randomize-ordering-seed=456"
-@Tags(<String>['no-shuffle'])
+@TestOn('!chrome')
 
 import 'dart:async';
 import 'dart:convert';
@@ -1999,7 +2003,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       _CreationLocation location = knownLocations[id]!;
       expect(location.file, equals(file));
       // ClockText widget.
-      expect(location.line, equals(60));
+      expect(location.line, equals(64));
       expect(location.column, equals(9));
       expect(location.name, equals('ClockText'));
       expect(count, equals(1));
@@ -2009,7 +2013,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       location = knownLocations[id]!;
       expect(location.file, equals(file));
       // Text widget in _ClockTextState build method.
-      expect(location.line, equals(98));
+      expect(location.line, equals(102));
       expect(location.column, equals(12));
       expect(location.name, equals('Text'));
       expect(count, equals(1));
@@ -2036,7 +2040,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       location = knownLocations[id]!;
       expect(location.file, equals(file));
       // ClockText widget.
-      expect(location.line, equals(60));
+      expect(location.line, equals(64));
       expect(location.column, equals(9));
       expect(location.name, equals('ClockText'));
       expect(count, equals(3)); // 3 clock widget instances rebuilt.
@@ -2046,7 +2050,7 @@ class _TestWidgetInspectorService extends TestWidgetInspectorService {
       location = knownLocations[id]!;
       expect(location.file, equals(file));
       // Text widget in _ClockTextState build method.
-      expect(location.line, equals(98));
+      expect(location.line, equals(102));
       expect(location.column, equals(12));
       expect(location.name, equals('Text'));
       expect(count, equals(3)); // 3 clock widget instances rebuilt.

packages/flutter_test/lib/src/matchers.dart

@@ -363,7 +363,8 @@ Matcher coversSameAreaAs(Path expectedPath, { required Rect areaToCompare, int s
 ///    verify that two different code paths create identical images.
 ///  * [flutter_test] for a discussion of test configurations, whereby callers
 ///    may swap out the backend for this matcher.
-AsyncMatcher matchesGoldenFile(Object key, {int? version}) {
+AsyncMatcher
+matchesGoldenFile(Object key, {int? version}) {
   if (key is Uri) {
     return MatchesGoldenFile(key, version);
   } else if (key is String) {

packages/flutter_test/test/matchers_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// flutter_ignore_for_file: golden_tag (see analyze.dart)
+
 import 'dart:typed_data';
 import 'dart:ui';
 

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

@@ -140,7 +140,7 @@ class TestCommand extends FlutterCommand with DeviceBasedDevelopmentArtifacts {
       )
       ..addFlag('update-goldens',
         negatable: false,
-        help: 'Whether "matchesGoldenFile()" calls within your test methods should '
+        help: 'Whether "matchesGoldenFile()" calls within your test methods should ' // flutter_ignore: golden_tag (see analyze.dart)
               'update the golden files rather than test for an existing match.',
       )
       ..addOption('concurrency',