Flutter 颤振测试框架捕获异常

我有以下小部件测试，当我没有运行任何测试时，测试正常通过，但当我运行所有主程序时，我有一个错误

我所做的测试符合以下要求：

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  testWidgets('initial status of login page', (WidgetTester tester) async {
    Widget widget = LoginPage();

    await tester.pumpWidget(MaterialApp(
      navigatorKey: navigatorKey,
      scaffoldMessengerKey: scaffoldMessengerKey,
      home: widget,
      locale: Locale('en'),
      supportedLocales: lang.getSupportedLocales(),
      localizationsDelegates: lang.localizationsDelegates,
      localeResolutionCallback: lang.getLocaleResolutionCallback,
    ));
    await tester.pumpAndSettle();

    expect(find.text(lang.translate('login.welcome')), findsOneWidget);
  });

  testWidgets('enter an invalid email', (WidgetTester tester) async {
    Widget widget = LoginPage();

    await tester.pumpWidget(MaterialApp(
      navigatorKey: navigatorKey,
      scaffoldMessengerKey: scaffoldMessengerKey,
      home: widget,
      locale: Locale('en'),
      supportedLocales: lang.getSupportedLocales(),
      localizationsDelegates: lang.localizationsDelegates,
      localeResolutionCallback: lang.getLocaleResolutionCallback,
    ));
    await tester.pumpAndSettle();

    final Finder emailInputFinder = find.byKey(Key('emailInput'));
    final Finder passwordInputFinder = find.byKey(Key('passwordInput'));
    final Finder signInButtonFinder = find.byKey(Key('signInButton'));

    await tester.tap(emailInputFinder);
    await tester.enterText(emailInputFinder, 'email');
    await tester.pumpAndSettle();
    await tester.enterText(passwordInputFinder, 'password');
    await tester.pumpAndSettle();

    expect(signInButtonFinder, findsNothing);
  });
}

在控制台中时发生的错误是：

        ✓  initial status of login page
══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following StateError was thrown running a test:
Bad state: No element

When the exception was thrown, this was the stack:
#0      Iterable.single (dart:core/iterable.dart:498:25)
#1      WidgetController._getElementPoint (package:flutter_test/src/controller.dart:814:47)
#2      WidgetController.getCenter (package:flutter_test/src/controller.dart:786:12)
#3      WidgetController.tap (package:flutter_test/src/controller.dart:257:18)
#4      main.<anonymous closure> (file:///Users/ezequiel/Documents/Larvia/lrv-mobile-app/test/widget_test/login2_test.dart:45:18)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)

The test description was:
  enter an invalid email
════════════════════════════════════════════════════════════════════════════════════════════════════
Test failed. See exception logs above.
The test description was: enter an invalid email

✓  登录页面的初始状态
══╡ 颤振测试框架捕获异常╞════════════════════════════════════════════════════
运行测试时引发了以下StateError：
错误状态：无元素
引发异常时，这是堆栈：
#0可扩展。单个（省道：核心/可扩展。省道：498:25）
#1个WidgetController.\u getElementPoint（包：颤振测试/src/控制器。dart:814:47）
#2 WidgetController.getCenter（包：颤振测试/src/controller.dart:786:12）
#3 WidgetController.tap（包：颤振测试/src/controller.dart:257:18）
#4主要问题。(file:///Users/ezequiel/Documents/Larvia/lrv-mobile-app/test/widget_test/login2_test.dart:45:18)
（从包中删除一帧：堆栈跟踪）
试验说明如下：
输入无效的电子邮件
════════════════════════════════════════════════════════════════════════════════════════════════════
测试失败。请参阅上面的异常日志。
测试描述为：输入无效电子邮件

我需要帮助，如果你有任何想法，我感谢你的时间