@Test(expected = Test.None.class)
public void testCheckKeyUniquenessWhenKeyBlank(){

    try{
        when(cassandraOperation.getRecordsByIndexedProperty(userDb.getKeySpace(), userDb.getTableName(), "", "")).thenReturn(new Response());
        userService.checkKeyUniqueness("","",false);
    }catch (Exception e) {
        Assert.assertTrue(false);
    }
}