Add --watch mode to flutter test (Redo)

dev/automated_tests/pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
     sdk: flutter
   test: 1.5.3
 
-  analyzer: 0.33.6+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  analyzer: 0.35.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   async: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -20,7 +20,7 @@ dependencies:
   convert: 2.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 2.0.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  front_end: 0.1.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  front_end: 0.1.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.12.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -29,7 +29,7 @@ dependencies:
   io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   json_rpc_2: 2.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  kernel: 0.3.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  kernel: 0.3.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   meta: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -68,4 +68,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 25f2
+# PUBSPEC CHECKSUM: 1d20

dev/benchmarks/complex_layout/pubspec.yaml

@@ -42,19 +42,19 @@ dev_dependencies:
     sdk: flutter
   test: 1.5.3
 
-  analyzer: 0.33.6+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  analyzer: 0.35.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  front_end: 0.1.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  front_end: 0.1.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.12.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_multi_server: 2.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 3.1.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  kernel: 0.3.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  kernel: 0.3.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   mime: 0.9.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -85,4 +85,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: 39c3
+# PUBSPEC CHECKSUM: e3f0

dev/benchmarks/macrobenchmarks/pubspec.yaml

@@ -42,19 +42,19 @@ dev_dependencies:
     sdk: flutter
   test: 1.5.3
 
-  analyzer: 0.33.6+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  analyzer: 0.35.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  front_end: 0.1.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  front_end: 0.1.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.12.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_multi_server: 2.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 3.1.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  kernel: 0.3.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  kernel: 0.3.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   mime: 0.9.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -82,4 +82,4 @@ dev_dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: 39c3
+# PUBSPEC CHECKSUM: e3f0

dev/benchmarks/microbenchmarks/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
     path: ../../../examples/stocks
   test: 1.5.3
 
-  analyzer: 0.33.6+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  analyzer: 0.35.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   async: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -24,20 +24,20 @@ dependencies:
   convert: 2.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 2.0.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  dart_style: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  front_end: 0.1.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  dart_style: 1.2.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  front_end: 0.1.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http: 0.12.0+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_multi_server: 2.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_parser: 3.1.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   intl: 0.15.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  intl_translation: 0.17.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  intl_translation: 0.17.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   isolate: 2.0.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   json_rpc_2: 2.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  kernel: 0.3.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  kernel: 0.3.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   mime: 0.9.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -76,4 +76,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: fd49
+# PUBSPEC CHECKSUM: 3b7a

dev/bots/pubspec.yaml

@@ -15,7 +15,7 @@ dependencies:
   http_parser: 3.1.3
   test: 1.5.3
 
-  analyzer: 0.33.6+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  analyzer: 0.35.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   async: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   boolean_selector: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   charcode: 1.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -24,15 +24,15 @@ dependencies:
   crypto: 2.0.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   file: 5.0.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  front_end: 0.1.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  front_end: 0.1.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   http_multi_server: 2.0.5 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   intl: 0.15.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   io: 0.3.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   js: 0.6.1+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   json_rpc_2: 2.0.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  kernel: 0.3.6+9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  kernel: 0.3.10 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   matcher: 0.12.3+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   mime: 0.9.6+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -67,4 +67,4 @@ dev_dependencies:
   mockito: 4.0.0
   test_api: 0.2.2
 
-# PUBSPEC CHECKSUM: ca97
+# PUBSPEC CHECKSUM: 02c4

dev/devicelab/bin/tasks/flutter_test__watch_test.dart

@@ -0,0 +1,215 @@
+// Copyright (c) 2019 The Chromium 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 test runs `flutter test --watch` on the `trivial_widget_test.dart`
+// three times.
+//
+// The intial run should pass.
+//
+// We then modify the source file, and the second time the test should fail.
+//
+// Before the third time, a change is made to test file, which should cause the
+// third run to again pass.
+//
+// We then reset the files to their initial state.
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:path/path.dart' as path;
+
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/framework/utils.dart';
+
+const String rerunLine = "Press 'r' to rerun your tests, 'q' to quit";
+
+class TestRunnerProcess {
+  TestRunnerProcess(this._process) {
+    _waitingForLine = rerunLine;
+    _completer = Completer<List<String>>();
+    _process.stdout.transform(utf8.decoder).transform(const LineSplitter()).listen((String line) {
+      _stdout.add(line);
+      if (_waitingForLine != null && line.contains(_waitingForLine)) {
+        print('Found line "$_waitingForLine", returning ${_stdout.length} lines');
+        _completer.complete(_stdout.map((String a) => a).toList());
+        _stdout.clear();
+        _waitingForLine = null;
+      }
+    });
+  }
+
+  final List<String> _stdout = <String>[]; // Collected lines
+  String _waitingForLine; // Substring of line currently waiting for
+  final Process _process; // Underlying system process
+  Completer<List<String>> _completer; // Used to control execution flow
+
+  Future<List<String>> sendChar(String char) {
+    _waitingForLine = rerunLine;
+    _completer = Completer<List<String>>();
+    _process.stdin.write(char[0]);
+    return _completer.future;
+  }
+
+  Future<List<String>> waitForLine(String line) {
+    _waitingForLine = line;
+    _completer = Completer<List<String>>();
+    return _completer.future;
+  }
+}
+
+Future<TestRunnerProcess> startTestRunner() async {
+  final Process process = await startProcess(
+    path.join(flutterDirectory.path, 'bin', 'flutter'),
+    <String>[
+      'test',
+      '-v',
+      '--watch',
+      path.join('flutter_test', 'trivial_widget_test.dart')
+    ],
+    workingDirectory: path.join(flutterDirectory.path, 'dev', 'automated_tests'),
+  );
+
+  final TestRunnerProcess testRunner = TestRunnerProcess(process);
+  await testRunner.waitForLine(rerunLine);
+  return testRunner;
+}
+
+// This will go through the `actual` list in order, looking for matches to the
+// `first` element of the expected list(contains), removing that element if found.
+// If at the end of the actual list, expected has any elements left, it is an
+// error.
+TaskResult expectMatchesInOrder(List<String> actual, List<String> expected) {
+  if (expected.isEmpty) {
+    return TaskResult.success(<String, dynamic>{});
+  }
+  for (String line in actual) {
+    if (line.contains(expected.first)) {
+      expected.removeAt(0);
+      if (expected.isEmpty) {
+        break;
+      }
+    }
+  }
+
+  if (expected.isNotEmpty) {
+    return TaskResult.failure(
+      "Could not find '${expected.first}' in:\n${actual.join('\n')}"
+    );
+  }
+
+  return TaskResult.success(<String, dynamic>{});
+}
+
+Future<TaskResult> runTest(TestRunnerProcess testRunner, {
+  String description = 'A test',
+  List<String> stdoutExpected = const <String>[],
+}) async {
+  print((description + ' ').padRight(80, '='));
+  final List<String> testRunOutput = await testRunner.sendChar('r');
+  return expectMatchesInOrder(testRunOutput, stdoutExpected);
+}
+
+void main() {
+  task(() async {
+    final File nodeSourceFile = File(path.join(
+      flutterDirectory.path, 'packages', 'flutter', 'lib', 'src', 'foundation', 'node.dart',
+    ));
+    final File testSourceFile = File(path.join(
+      flutterDirectory.path, 'dev', 'automated_tests', 'flutter_test', 'trivial_widget_test.dart',
+    ));
+
+    final String originalSource = await nodeSourceFile.readAsString();
+    final String testOriginalSource = await testSourceFile.readAsString();
+
+    try {
+      final TestRunnerProcess testRunner = await startTestRunner();
+      TaskResult result;
+
+      result = await runTest(testRunner,
+        description: 'Rerun with no change',
+        stdoutExpected: <String>[
+          'A trivial widget test',
+          'All tests passed!',
+          "Press 'r' to rerun",
+        ]
+      );
+
+      if (!result.succeeded) {
+        return result;
+      }
+
+      await nodeSourceFile.writeAsString( // only change implementation
+        originalSource
+          .replaceAll('_owner', '_xyzzy')
+      );
+      result = await runTest(testRunner,
+        description: 'Rerun with implementation change to source',
+        stdoutExpected: <String>[
+          'Recompiling test files...',
+          'A trivial widget test',
+          'All tests passed!',
+          "Press 'r' to rerun",
+        ],
+      );
+
+      if (!result.succeeded) {
+        return result;
+      }
+
+      await nodeSourceFile.writeAsString( // change interface as well
+        originalSource
+          .replaceAll('_owner', '_xyzzy')
+          .replaceAll('owner', '_owner')
+          .replaceAll('_xyzzy', 'owner')
+      );
+      result = await runTest(testRunner,
+        description: 'Rerun with interface changed in source',
+        stdoutExpected: <String>[
+          'Recompiling test files...',
+          'A trivial widget test',
+          'All tests passed!',
+          "Press 'r' to rerun",
+        ],
+      );
+
+      if (!result.succeeded) {
+        return result;
+      }
+
+      // Test that introducing an error to the test source, creates a failure.
+      final String patchedTestSource =
+          testOriginalSource
+          .replaceAll(
+            '(WidgetTester tester) async {}',
+            '''
+(WidgetTester tester) async {
+  expect(true, false);
+}''');
+      final Future<List<String>> invalidateFuture = testRunner.waitForLine('Will invalidate');
+      await testSourceFile.writeAsString(patchedTestSource);
+      final List<String> invalidateOutput = await invalidateFuture;
+      final TaskResult invalidateResult = expectMatchesInOrder(invalidateOutput, <String>['Will invalidate']);
+
+      if (!invalidateResult.succeeded) {
+        return invalidateResult;
+      }
+
+      result = await runTest(testRunner,
+        description: 'Rerun with error in test file ',
+        stdoutExpected: <String>[
+          'Recompiling test files...',
+          'Expected: <false>',
+          'Actual: <true>',
+          'Some tests failed.',
+        ],
+      );
+
+      return result;
+    } finally {
+      await nodeSourceFile.writeAsString(originalSource);
+      await testSourceFile.writeAsString(testOriginalSource);
+    }
+  });
+}

dev/devicelab/manifest.yaml

@@ -476,6 +476,13 @@ tasks:
     stage: devicelab
     required_agent_capabilities: ["linux/android"]
 
+  flutter_test__watch_test:
+    description: >
+      Ensures that --watch flag to flutter test command works as intended.
+    stage: devicelab
+    required_agent_capabilities: ["linux/android"]
+    flaky: true
+
   technical_debt__cost:
     description: >
       Estimates our technical debt (TODOs, analyzer ignores, etc).