Mocking Spring MVC BindingResult when using annotations

You could also use something like Mockito to create a mock of the BindingResult and pass that to your controller method, ie

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
import static org.mockito.Mockito.verifyZeroInteractions;

@Test
public void createDoesNotCreateAnythingWhenTheBindingResultHasErrors() {
    // Given
    SomeDomainDTO dto = new SomeDomainDTO();
    ModelAndView mv = new ModelAndView();

    BindingResult result = mock(BindingResult.class);
    when(result.hasErrors()).thenReturn(true);

    // When
    controller.create(dto, result, mv);

    // Then
    verifyZeroInteractions(lockAccessor);
}

This can give you more flexibility and simplify scaffolding.

BindingResult is an interface so can you not simply pass in one of Springs implementations of that interface?

I don't use annotations in my Spring MVC code but when I want to test the validate method of a validator I just pass in an instance of BindException and then use the values it returns in assertEquals etc.