[flutter_tools] delete exit immediately test (#75927)

packages/flutter_tools/test/integration.shard/flutter_immediately_exit_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.
-
-// @dart = 2.8
-
-import 'package:file/file.dart';
-
-import '../src/common.dart';
-import 'test_data/project_with_immediate_exit.dart';
-import 'test_driver.dart';
-import 'test_utils.dart';
-
-void main() {
-  group('immediate exit', () {
-    Directory tempDir;
-    final ProjectWithImmediateExit _project = ProjectWithImmediateExit();
-    FlutterRunTestDriver _flutter;
-
-    setUp(() async {
-      tempDir = createResolvedTempDirectorySync('run_test.');
-      await _project.setUpIn(tempDir);
-      _flutter = FlutterRunTestDriver(tempDir);
-    });
-
-    tearDown(() async {
-      tryToDelete(tempDir);
-    });
-
-    testWithoutContext('flutter_tools gracefully handles quick app shutdown', () async {
-      try {
-        await _flutter.run();
-      } on Exception {
-        expect(_flutter.lastErrorInfo, contains('Error connecting to the service protocol:'));
-        expect(
-            _flutter.lastErrorInfo.contains(
-              // Looks for stack trace entry of the form:
-              //   test/integration.shard/test_driver.dart 379:18  FlutterTestDriver._waitFor.<fn>
-                RegExp(r'^(.+)\/([^\/]+)\.dart \d*:\d*\s*.*\$')
-            ),
-            isFalse
-        );
-      }
-    });
-  }, skip: true, // Flaky: https://github.com/flutter/flutter/issues/74052
-  );
-}

packages/flutter_tools/test/integration.shard/test_data/project_with_immediate_exit.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.
-
-// @dart = 2.8
-
-import 'project.dart';
-
-class ProjectWithImmediateExit extends Project {
-
-  @override
-  final String pubspec = '''
-  name: test
-  environment:
-    sdk: ">=2.12.0-0 <3.0.0"
-
-  dependencies:
-    flutter:
-      sdk: flutter
-  ''';
-
-  @override
-  final String main = r'''
-  import 'dart:async';
-  import 'dart:io';
-
-  Future<void> main() async {
-    await Future.delayed(const Duration(milliseconds: 50));
-    exit(0);
-  }
-  ''';
-
-}