在运行Flutter集成测试时，'!_debugInitialized'不为真。

Question

在运行Flutter集成测试时，'!_debugInitialized'不为真。

14

我正在尝试运行基本的Flutter集成测试来调用我的主应用程序小部件，但是它失败了。我已经按照官方文档中描述的方法进行了操作[https://docs.flutter.dev/testing/integration-tests]。以下是完整的堆栈跟踪：

Running "flutter pub get" in my_app...              2,651ms
Running Gradle task 'assembleStagingDebug'...                           
Running Gradle task 'assembleStagingDebug'... Done                 35.1s
✓  Built build/app/outputs/flutter-apk/app-staging-debug.apk.
Installing build/app/outputs/flutter-apk/app.apk...                10.5s
VMServiceFlutterDriver: Connecting to Flutter application at http://127.0.0.1:56037/_2tNx8J1Lj8=/
VMServiceFlutterDriver: Isolate found with number: 4501853398952855
VMServiceFlutterDriver: Isolate is paused at start.
VMServiceFlutterDriver: Attempting to resume isolate
D/EGL_emulation(29263): eglMakeCurrent: 0xa27a1bc0: ver 3 0 (tinfo 0xa2a835b0)
I/flutter (29263): 00:00 +0: (setUpAll)
VMServiceFlutterDriver: Connected to Flutter application.
I/flutter (29263): 00:00 +1: My Tests Basic Home Screen Smoke test
I/flutter (29263): (The following exception is now available via WidgetTester.takeException:)
I/flutter (29263): ══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
I/flutter (29263): The following assertion was thrown running a test:
I/flutter (29263): 'package:flutter/src/foundation/binding.dart': Failed assertion: line 55 pos 12:
I/flutter (29263): '!_debugInitialized': is not true.
I/flutter (29263): 
I/flutter (29263): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (29263): more information in this error message to help you determine and fix the underlying cause.
I/flutter (29263): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (29263):   https://github.com/flutter/flutter/issues/new?template=2_bug.md
I/flutter (29263): 
I/flutter (29263): When the exception was thrown, this was the stack:
I/flutter (29263): #2      new BindingBase (package:flutter/src/foundation/binding.dart:55:12)
I/flutter (29263): #3      new _WidgetsFlutterBinding&BindingBase&GestureBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #4      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #5      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #6      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #7      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #8      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #9      new
_WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #10     new WidgetsFlutterBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #11     new CustomImageCache (package:app/custom_image_cache.dart)
I/flutter (29263): #12     main (package:app/main_staging.dart:51:3)
I/flutter (29263): #13     main.<anonymous closure>.<anonymous closure> (file:///Users/Documents/my_app/integration_test/app_test.dart:29:7)
I/flutter (29263): #14     main.<anonymous closure>.<anonymous closure> (file:///Users/Documents/my_app/integration_test/app_test.dart:28:49)
I/flutter (29263): #15     testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:156:29)
I/flutter (29263): <asynchronous suspension>
I/flutter (29263): <asynchronous suspension>
I/flutter (29263): (elided 3 frames from class _AssertionError and package:stack_trace)
I/flutter (29263): 
I/flutter (29263): The test description was:
I/flutter (29263):   Basic Home Screen Smoke test
I/flutter (29263): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter (29263): (If WidgetTester.takeException is called, the above exception will be ignored. If it is not, then the above exception will be dumped when another
exception is caught by the framework or when the test ends, whichever happens first, and then the test will fail due to having not caught or expected the
exception.)
I/flutter (29263): ══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
I/flutter (29263): The following assertion was thrown running a test:
I/flutter (29263): 'package:flutter/src/foundation/binding.dart': Failed assertion: line 55 pos 12:
I/flutter (29263): '!_debugInitialized': is not true.
I/flutter (29263): 
I/flutter (29263): Either the assertion indicates an error in the framework itself, or we should provide substantially
I/flutter (29263): more information in this error message to help you determine and fix the underlying cause.
I/flutter (29263): In either case, please report this assertion by filing a bug on GitHub:
I/flutter (29263):   https://github.com/flutter/flutter/issues/new?template=2_bug.md
I/flutter (29263): 
I/flutter (29263): When the exception was thrown, this was the stack:
I/flutter (29263): #2      new BindingBase (package:flutter/src/foundation/binding.dart:55:12)
I/flutter (29263): #3      new _WidgetsFlutterBinding&BindingBase&GestureBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #4      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #5      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #6      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #7      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #8      new _WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #9      new
_WidgetsFlutterBinding&BindingBase&GestureBinding&SchedulerBinding&ServicesBinding&PaintingBinding&SemanticsBinding&RendererBinding&WidgetsBinding
(package:flutter/src/widgets/binding.dart)
I/flutter (29263): #10     new WidgetsFlutterBinding (package:flutter/src/widgets/binding.dart)
I/flutter (29263): #11     new CustomImageCache (package:app/custom_image_cache.dart)
I/flutter (29263): #12     main (package:app/main_staging.dart:51:3)
I/flutter (29263): #13     main.<anonymous closure>.<anonymous closure> (file:///Users/cs/Documents/my_app/integration_test/app_test.dart:29:7)
I/flutter (29263): #14     main.<anonymous closure>.<anonymous closure> (file:///Users/cs/Documents/my_app/integration_test/app_test.dart:28:49)
I/flutter (29263): #15     testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:156:29)
I/flutter (29263): <asynchronous suspension>
I/flutter (29263): <asynchronous suspension>
I/flutter (29263): (elided 3 frames from class _AssertionError and package:stack_trace)
I/flutter (29263): 

The test description was:
  Basic Home Screen Smoke test
═════════════════════════════════════════════════════════════════

end of failure 1



I/flutter (29881):   'package:flutter_test/src/binding.dart': Failed assertion: line 1648 pos 12: '!_expectingFrame': is not true.

我有以下文件设置：

test_driver/integration_driver.dart

import 'package:integration_test/integration_test_driver.dart';

Future<void> main() => integrationDriver();

集成测试/app测试.dart

import 'package:app/main_staging.dart' as stagingApp;
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  group("My tests", () {
    testWidgets('Basic Home Screen Smoke test', (WidgetTester tester) async {
      stagingApp.main();
      await tester.pumpWidget(stagingApp.MyApp());
      // await Future.delayed(Duration(seconds: 1));
      await tester.pumpAndSettle(Duration(seconds: 20));
    });
  });
}

我正在运行的命令

flutter drive \
  --flavor dev \
  --driver=test_driver/integration_driver.dart \
  --target=integration_test/app_test.dart

主函数具有这样的设置：

void main() async {
  ...
  WidgetsFlutterBinding.ensureInitialized();
  ...
}

- Bhupesh Varshney

4

你解决了吗？我也遇到了同样的问题。 - Jochen

1

我在 test_driver/integration_driver.dart 中也添加了 IntegrationTestWidgetsFlutterBinding.ensureInitialized();, 这个错误就消失了。 - innich

1个回答

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- innich · Accepted Answer

在 test_driver/integration_driver.dart 中添加 IntegrationTestWidgetsFlutterBinding.ensureInitialized();。

import 'package:integration_test/integration_test.dart';
import 'package:integration_test/integration_test_driver.dart';

Future<void> main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  return integrationDriver();
}