Remove unused build_mode_test (#86808)

dev/devicelab/bin/tasks/build_mode_test.dart

-// 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.
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:flutter_devicelab/common.dart';
-import 'package:flutter_devicelab/framework/devices.dart';
-import 'package:flutter_devicelab/framework/framework.dart';
-import 'package:flutter_devicelab/framework/task_result.dart';
-import 'package:flutter_devicelab/framework/utils.dart';
-import 'package:path/path.dart' as path;
-
-Future<String> runFlutterAndQuit(List<String> args, Device device) async {
-  final Completer<void> ready = Completer<void>();
-  print('run: starting...');
-  final Process run = await startProcess(
-    path.join(flutterDirectory.path, 'bin', 'flutter'),
-    <String>['run', '--suppress-analytics', '--no-publish-port', ...args],
-    isBot: false, // we just want to test the output, not have any debugging info
-  );
-  final List<String> stdout = <String>[];
-  final List<String> stderr = <String>[];
-  int? runExitCode;
-  run.stdout.transform<String>(utf8.decoder).transform<String>(const LineSplitter()).listen(
-    (String line) {
-      print('run:stdout: $line');
-      stdout.add(line);
-      if (line.contains('>>> FINISHED <<<')) {
-        ready.complete();
-      }
-    },
-  );
-  run.stderr.transform<String>(utf8.decoder).transform<String>(const LineSplitter()).listen(
-    (String line) {
-      print('run:stderr: $line');
-      stderr.add(line);
-    },
-  );
-  unawaited(run.exitCode.then<void>((int exitCode) {
-    runExitCode = exitCode;
-  }));
-  await Future.any<dynamic>(<Future<dynamic>>[ready.future, run.exitCode]);
-  if (runExitCode != null) {
-    throw 'Failed to run test app; runner unexpected exited, with exit code $runExitCode.';
-  }
-  run.stdin.write('q');
-  await run.exitCode;
-  if (stderr.isNotEmpty) {
-    throw 'flutter run ${args.join(' ')} had output on standard error:\n${stderr.join('\n')}';
-  }
-  return stdout.join('\n');
-}
-
-void main() {
-  task(() async {
-    final Device device = await devices.workingDevice;
-    await device.unlock();
-    final Directory appDir = dir(path.join(flutterDirectory.path, 'dev/integration_tests/ui'));
-    Future<void> checkMode(String mode, {bool releaseExpected = false, bool dynamic = false}) async {
-      await inDirectory(appDir, () async {
-        print('run: starting $mode test...');
-        final List<String> args = <String>[
-          '--$mode',
-          if (dynamic) '--dynamic',
-          '-d',
-          device.deviceId,
-          'lib/build_mode.dart',
-        ];
-        final String stdout = await runFlutterAndQuit(args, device);
-        if (!stdout.contains('>>> Release: $releaseExpected <<<')) {
-          throw "flutter run --$mode ${dynamic ? '--dynamic ' : ''}didn't set kReleaseMode properly";
-        }
-      });
-    }
-    await checkMode('debug', releaseExpected: false);
-    await checkMode('profile', releaseExpected: false);
-    await checkMode('profile', releaseExpected: false, dynamic: true);
-    await checkMode('release', releaseExpected: true);
-    await checkMode('release', releaseExpected: true, dynamic: true);
-    return TaskResult.success(null);
-  });
-}

dev/integration_tests/ui/integration_test/integration_test.dart

@@ -2,8 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:integration_ui/build_mode.dart' as app;
+import 'package:integration_ui/overflow.dart' as app;
 
 void main() {
   group('Integration Test', () {
@@ -11,7 +12,7 @@ void main() {
         app.main();
         await tester.pumpAndSettle();
 
-        expect(find.text('Hello, world!'), findsOneWidget);
+        expect(find.byType(SizedBox), findsOneWidget);
       });
   });
 }

dev/integration_tests/ui/lib/build_mode.dart

-// 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.
-
-import 'dart:io';
-import 'package:flutter/foundation.dart';
-import 'package:flutter/widgets.dart';
-
-Future<void> main() async {
-  print('>>> Release: $kReleaseMode <<<');
-  print('>>> FINISHED <<<');
-  stdout.flush();
-  runApp(const Text('Hello, world!', textDirection: TextDirection.ltr));
-}