@Test
public void testGetInstanceFleetsWhenInputListContainsNullElement()
{

    // Create objects required for testing with a list of emrClusterDefinitionInstanceFleets having a null element.
    List<EmrClusterDefinitionInstanceFleet> emrClusterDefinitionInstanceFleets = new ArrayList<>();
    emrClusterDefinitionInstanceFleets.add(null);
    // Call the method under test.
    List<InstanceFleetConfig> result = emrDaoImpl.getInstanceFleets(emrClusterDefinitionInstanceFleets);
    // Verify the external calls.
    verifyNoMoreInteractionsHelper();
    // Validate the results.
    assertEquals(new ArrayList<>(), result);
}