Assert.assertEquals(true, !columns.isEmpty());
Assert.assertEquals(2, columns.size());
Assert.assertEquals(true, columns.contains(inverseJoinKey1.toString()));
Assert.assertEquals(true, columns.contains(inverseJoinKey2.toString()));
client.deleteByColumn(schemaName, tableName, inverseJoinColumn, inverseJoinKey1);
client.deleteByColumn(schemaName, tableName, inverseJoinColumn, inverseJoinKey2);
columns = client.getColumnsById(schemaName, tableName, joinColumn, inverseJoinColumn, joinKey, String.class);
Assert.assertTrue(columns.isEmpty());