@Test public void shouldFindByNumberOfDays() { when(finderByDays.findFromDays(null, 30)) .thenReturn(new PastSnapshot("days", null).setModeParameter("30")); PastSnapshot variationSnapshot = finder.find(null, 1, "30"); verify(finderByDays).findFromDays(null, 30); assertNotNull(variationSnapshot); assertThat(variationSnapshot.getIndex(), is(1)); assertThat(variationSnapshot.getMode(), is("days")); assertThat(variationSnapshot.getModeParameter(), is("30")); }