@RunWith(MockitoJUnitRunner.class)

public class SomeBusinessMockAnnotationsTest {

@Mock

DataService dataServiceMock;

@InjectMocks

SomeBusinessImpl businessImpl;

@Test

public void testFindTheGreatestFromAllData() {

when(dataServiceMock.retrieveAllData())

.thenReturn(new int[] { 24, 15, 3 });

assertEquals(24, businessImpl.findTheGreatestFromAllData());

}