How to test ViewModel in Android?

Testing ViewModel in Android is essential for ensuring that your application's UI logic works as intended. Below is a simple guide on how to effectively test a ViewModel using JUnit and Mockito.


        import androidx.lifecycle.MutableLiveData;
        import androidx.lifecycle.ViewModel;
        import org.junit.Before;
        import org.junit.Test;
        import org.mockito.Mock;
        import org.mockito.MockitoAnnotations;

        import static org.mockito.Mockito.verify;

        public class MyViewModel extends ViewModel {
            private MutableLiveData data = new MutableLiveData<>();

            public MutableLiveData getData() {
                return data;
            }

            public void updateData(String value) {
                data.setValue(value);
            }
        }

        public class MyViewModelTest {
            @Mock
            private MyViewModel viewModel;

            @Before
            public void setUp() {
                MockitoAnnotations.initMocks(this);
                viewModel = new MyViewModel();
            }

            @Test
            public void testUpdateData() {
                String testValue = "Hello World";
                viewModel.updateData(testValue);
                verify(viewModel.getData()).setValue(testValue);
            }
        }

Android ViewModel testing JUnit Mockito LiveData unit testing UI logic

How to test ViewModel in Android?

Popular Topics

Recent Languages

How to test ViewModel in Android?

Related Questions

Popular Topics

Recent Languages