@Test
public void testGetConfigurationsWhenInputListContainsNullElement()
{

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