@Test
public void test2ExecuteQuery() {

    System.out.println("executeQuery");
    String measurement = "unittest";
    Map<String, List<String>> filter = null;
    List<TSData> results = new ArrayList<>();
    instance.executeQuery(measurement, startTime, stopTime, filter, results);
    assertEquals(3, results.size()); //two fields: if:in-errors and if:name
    assertEquals(MEASUREMENTS, results.get(0).m_tsPoints.size());
    assertEquals(MEASUREMENTS, results.get(1).m_tsPoints.size());
    showResult(results);
}