Flutter集成测试中提交TextField

Question

我有一个简单的文本字段，当用户在文本字段中提交值时会执行一些操作：

TextField(
        textInputAction: TextInputAction.search,
        onSubmitted: onSearchEmail,
      )

足够简单...我正在尝试编写一个集成测试来检查用户提交文本字段时执行的操作 - 但是我无法弄清楚如何模拟用户按下“搜索”按钮键盘 (android) 或 iOS 中的任何等价物......

我天真地尝试了driver.enterText("a@b.c\r\n");，但无济于事。

我的集成测试：

test('entering email performs a search', () async {
  driver.tap(find.byValueKey('search-email-search-box'));
  driver.enterText("a@b.c\r\n"); // <- doesn't work
  await driver.waitFor(find.text("some text));
});

我真的不想要用户必须按下的屏幕上的按钮，键盘按钮可以正常工作。

编辑：只是为了澄清 - 文本输入到该字段中以便位有效，它只是没有提交。

Answer 1

Flutter Driver 仍然没有触发onFieldSubmitted 的功能。我按照提到的解决方法here 触发TextInputAction。该解决方法适用于 integration_test - 目前推荐的在 Flutter 中编写集成测试的方法。

设目标测试脚本为：

即位于/integration_test/foo_test.dart

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:integration_test/integration_test.dart';
import 'package:sample55101120/main.dart' as app;

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();

  testWidgets("TextFormField Test", (WidgetTester tester) async {
    // Build the app and trigger a frame.
    await tester.pumpWidget(app.MyApp());

    /// Find TextFormField widget by Key and enter text
    await tester.enterText(find.byKey(Key('search-email-search-box')), 'a@b.c');
    await tester.testTextInput.receiveAction(TextInputAction.done);
    await tester.pump();

    expect(find.text('a@b.c'), findsOneWidget);
  });
}

让test_driver/integration_test.dart成为

import 'package:integration_test/integration_test_driver.dart';

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

至于我使用过的示例应用：

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  void onSearchEmail(String value){
    debugPrint('onSearchEmail $value');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            TextFormField(
              key: Key('search-email-search-box'),
              textInputAction: TextInputAction.search,
              onFieldSubmitted: (String value) => onSearchEmail(value),
            ),
          ],
        ),
      ),
    );
  }
}

要运行此示例：

flutter drive --target=integration_test/foo_test.dart --driver=test_driver/integration_test.dart