    @Test
    public void testThatItKnowsNotToPrependZeroToHourIfHourIsEqualToTen() {

        Time time = Mockito.mock(Time.class);
        Mockito.when(time.hour()).thenReturn(10);
        Mockito.when(time.minutes()).thenReturn(37);
        Mockito.when(time.seconds()).thenReturn(24);
        TimeViewModel timeViewModel = new TimeViewModel(time);
        String expectedFormattedTime = "10:37";
        assertEquals(expectedFormattedTime, timeViewModel.formattedTime());
    }