How can we stub a dependency which is injected directly into a function without using parameters ?

[thechinkysight]

I have a class like this :

class ViewModel {
  String get getFirstName=>"Tenzin";

  String getFullName() {
    // I want to stub this getter
    String firstName = getFirstName;

    String lastName = 'Lhamo';

    return firstName + ' ' + lastName;
  }
}

Inside the test:

void main(){
 test('description', () {
    ViewModel viewModel = ViewModel();
    // How can I stub getFirstName getter to return 'Tsering' instead of 'Tenzin' 
   expect(viewModel.getFullName(), 'Tsering Lhamo');

  });
}

[srawlins]

You can stub getFirstName:

when(viewModel.getFirstName).thenReturn('Tsering');

But viewModel should be a Mock, not just a ViewModel.

[thechinkysight]

You can stub getFirstName:

when(viewModel.getFirstName).thenReturn('Tsering');

But viewModel should be a Mock, not just a ViewModel.

Not working sir

class ViewModel {
  String get getFirstName => "Tenzin";

  String getFullName() {
    // I want to stub this getter
    String firstName = getFirstName;

    String lastName = 'Lhamo';

    return firstName + ' ' + lastName;
  }
}

class MockViewModel extends Mock implements ViewModel {}

void main() {
  test('description', () {
    MockViewModel viewModel = MockViewModel();
    when(viewModel.getFirstName).thenReturn('Tsering');
    expect(viewModel.getFullName(), 'Tsering Lhamo');
  });
}

Test Output is like :

Expected: 'Tsering Lhamo'
  Actual: <null>
   Which: not an <Instance of 'String'>

The Docs States : By default, any instance method of the mock instance returns null. The when, thenReturn, thenAnswer, and thenThrow APIs provide a stubbing mechanism to override this behavior.

[srawlins]

When you extended Mock, and implemented ViewModel, you no longer have ViewModel's implementation of getFullName. Since you have not stubbed getFullName, it returns null.

[thechinkysight]

When you extended Mock, and implemented ViewModel, you no longer have ViewModel's implementation of getFullName. Since you have not stubbed getFullName, it returns null.

Yeah so is there any way around for my problem ?

[srawlins]

I think I understand your question. You want some methods to be stubbed, and some to be real. No, I don't think mockito can solve this problem for you. You can just make a simple override:

class TestViewModel extends ViewModel {
  String getFullName = 'Tsering';
}

[thechinkysight]

I think I understand your question. You want some methods to be stubbed, and some to be real. No, I don't think mockito can solve this problem for you. You can just make a simple override:

class TestViewModel extends ViewModel {
  String getFullName = 'Tsering';
}

ahh poor me :( never mind I hope it will be in future