Android PowerMockito of TextUtils returns wrong result

Question

I have updated to Android 31 and Android Studio Dolphin and now my tests are failing because of TextUtils.isEmpty() returns wrong result.

I have this method to mock TextUtils.isEmpty().

  protected void mockTextUtilsIsEmpty() {
      PowerMockito.mockStatic(TextUtils.class);
    PowerMockito.when(TextUtils.isEmpty(any(CharSequence.class))).thenAnswer(invocation   -> {
      String val = (String) invocation.getArguments()[0];
      return val == null || val.length() == 0;
    });
  }

This is my test class.

@RunWith(PowerMockRunner.class) @PrepareForTest(TextUtils.class)
public class CustomerDetailsPresenterTest extends BaseTest {

  @Rule TrampolineSchedulerRule trampolineSchedulerRule = new TrampolineSchedulerRule();

  @Mock GetCustomerUseCase getCustomerUseCase;
  @Mock GetMenuItemsUseCase getMenuItemsUseCase;
  @Mock RolesManager rolesManager;
  @Mock CustomerDetailsPresenter.View view;

  private CustomerDetailsPresenter presenter;
  private final int customerId = 1;

  @Before public void setUp() {
    mockTextUtilsIsEmpty();
    presenter = new CustomerDetailsPresenter(getCustomerUseCase, getMenuItemsUseCase, rolesManager);
    presenter.setView(view);
  }

  @Test public void shouldDisplayCustomerWithEmptyData() {
    // Given
    CustomerDetails customerDetails = CustomerDetails.newBuilder()
      .build();

    // When
    Mockito.when(getCustomerUseCase.execute(customerId)).thenReturn(Single.just(customerDetails));
    presenter.getCustomerDetails(customerId);

    //Then
    Mockito.verify(view).showRefreshing();
    Mockito.verify(view).hideRefreshing();
    Mockito.verify(view).displayCustomerEmailUnknown();
    Mockito.verify(view).displayCustomerNoteUnknown();
  }
}

This is my actual class that I want to test.

 public class CustomerDetailsPresenter implements Presenter{

 private final GetCustomerUseCase getCustomerUseCase;
 private final GetMenuItemsUseCase getMenuItemsUseCase;
 private final RolesManager rolesManager;
 private CompositeDisposable disposables;
 private View view;

 @Inject public CustomerDetailsPresenter(
 GetCustomerUseCase getCustomerUseCase,
 GetMenuItemsUseCase getMenuItemsUseCase,
 RolesManager rolesManager
 ) {
 this.getCustomerUseCase = getCustomerUseCase;
 this.getMenuItemsUseCase = getMenuItemsUseCase;
 this.rolesManager = rolesManager;
 }

 public void setView(View view) {
 this.view = view;
 }

public void getCustomerDetails(int id) {
disposables = RxUtil.initDisposables(disposables);

if (rolesManager.isUserReadOnly()) {
  view.showScreenAsReadOnly();
}

view.showRefreshing();

Disposable disposable = getCustomerUseCase.execute(id)
  .doOnSuccess(customerDetails -> view.hideRefreshing())
  .subscribe(customerDetails -> {
      if (customerDetails != null) {

       if (TextUtils.isEmpty(customerDetails.getInvoiceEmail())) {
          view.displayCustomerEmailUnknown();
        } else {
          view.displayCustomerEmail(customerDetails.getInvoiceEmail());
        }

        if (TextUtils.isEmpty(customerDetails.getBillingNote())) {
          view.displayCustomerNoteUnknown();
        } else {
          view.displayCustomerNote(customerDetails.getBillingNote());
        }

        view.displayCustomerAddress(customerDetails);
        view.displayLastModified(customerDetails);
        } else {
          view.hideCustomerSecondAndThirdPhones();
        }
      } else {
        view.hideCustomerDetails();
      }
    },
    view::handleError
  );

disposables.add(disposable);

What could be the problem?

So, in this part, it always goes to the else part of the statement, and as you can in my unit test that should not happen since I am providing null to invoice email field.

if (TextUtils.isEmpty(customerDetails.getInvoiceEmail())) {
          view.displayCustomerEmailUnknown();
        } else {
          view.displayCustomerEmail(customerDetails.getInvoiceEmail());
}

Any ideas?

Android PowerMockito of TextUtils returns wrong result

0 Answers0