@Test
public void testCollectInformationsWhenThereIsNoDescriptor() {

    //GIVEN
    given(sequenceManager.getDescriptors()).willReturn(new HashMap<String, SequenceDescriptor>());
    //WHEN
    Map<String, Object> result = underTest.collectInformation();
    //THEN
    int sum = (int) result.get(SequenceInformationCollector.SUM_KEY);
    Assert.assertEquals(sum, 0);
    Map<String, Integer> groups = (Map<String, Integer>) result.get(SequenceInformationCollector.GROUPS_KEY);
    Assert.assertEquals(groups.size(), 0);
}