Testing

[lishaduck]

• If I mock a Dio HttpClientAdapter, I get this logged: Exception: Invalid image data.
• If I use the default Dio, I get this logged: DioException [bad response]: This exception was thrown because the response has a status code of 400 and RequestOptions.validateStatus was configured to throw for this status code. The status code of 400 has the following meaning: "Client error - the request contains bad syntax or cannot be fulfilled" Read more about status codes at https://developer.mozilla.org/en-US/docs/Web/HTTP/Status In order to resolve this exception you typically have either to verify and fix your request code or you have to fix the server code..

I'm not sure what response I need to provide to make these go away, as I can't debug my tests with all of the noise. I'm currently giving it a ResponseBody.fromString('', 200).

[lishaduck]

This worked: ResponseBody(Stream.value(TileProvider.transparentImage), 200).

(Fuller code)

class MockDioAdapter extends Mock implements HttpClientAdapter {}

HttpClientAdapter _getMockAdapter() {
  final mockDioAdapter = MockDioAdapter();
  // ignore: discarded_futures - Must not be async for Mocktail to work.
  when(() => mockDioAdapter.fetch(any(), any(), any())).thenAnswer(
    (_) => Future.value(
      ResponseBody(Stream.value(TileProvider.transparentImage), 200),
    ),
  );

  return mockDioAdapter;
}