@Test
public void allowDeleteRelationshipTypeWithData()
{

    Mockito.when( relationshipService.getRelationshipsByRelationshipType( Mockito.any() ) ).thenReturn(
        Lists.newArrayList( new Relationship() ) );
    String res = relationshipDeletionHandler.allowDeleteRelationshipType( relationshipTypeWithoutData );
    assertNotNull( res );
}