Flutter小部件测试-等待将来完成

Question

我有一个窗口小部件测试，该测试会抽动被测试的窗口小部件， 并在其打开时执行后台操作（staticWrapper.requestPermission（）），该操作将返回Future并根据其结果设置状态。 问题是测试没有等待这个将来完成的测试代码：

/// When micro permission denied, should show error message.
testWidgets('When micro permission denied, should show error message.',
    (WidgetTester tester) async {
  when(staticWrapper.requestPermission(Permission.RecordAudio))
      .thenAnswer((_) => Future.value(PermissionStatus.denied));
  await tester.pumpWidget(widget);
  final loginText = find.text(callScreen_microPermissionDenied);
  expect(loginText, findsOneWidget);
});

受影响的小部件代码：

void _requestMicroPermission() async {
final result =
    await staticWrapper.requestPermission(Permission.RecordAudio);
debugPrint("Microphone permission status: $result");
if (result == PermissionStatus.authorized) {
  native.init();
} else {
  setState(() {
    _loginText = tnsManager.getText(TranslationsManager.callScreen_microPermissionDenied);
  });
}

}

expect（）方法在setState（）调用之前被调用。

有帮助吗？

Answer 1

最后，我使用WidgetTester#pumpAndSettle()解决了该问题：

testWidgets('When micro permission denied, should show error message.',
    (WidgetTester tester) async {
  when(staticWrapper.requestPermission(Permission.RecordAudio))
      .thenAnswer((_) => Future.value(PermissionStatus.denied));
  await tester.pumpWidget(widget);
  await tester.pump();
  final loginText = find.text(callScreen_microPermissionDenied);
  expect(loginText, findsOneWidget);
});