BouncerTestV2.java

@RunWith(MockitoJUnitRunner.class)
public class BouncerTest {
    @Mock
    private EntranceChecker entranceChecker;

    private Bouncer bouncer;
    
    @Mock
    Person inListPerson;
    
    @Mock
    Person notInListPerson;
    
    @Before
    public init() {
        Mockito.when(entranceChecker.isInTheGuestList(inListPerson)).thenReturn(true);
        Mockito.when(entranceChecker.isInTheGuestList(notInListPerson)).thenReturn(false);                     
        this.bouncer = new Bouncer(entranceChecker);
    }

    @Test
    public boolean shouldBlock_nullPerson_notBlock() {
      boolean result = bouncer.shouldBlock(inListPerson);
      Assert.assertTrue(result);
    }
    
    @Test
    public boolean shouldBlock_nullPerson_block() {
      boolean result = bouncer.shouldBlock(notInListPerson);
      Assert.assertTrue(result);
    }
}