@Test
public void testFindObservations_withNoPolygon() throws Exception {

    final List<SamplingPoint> samples = new ArrayList<>();
    samples.add(new SamplingPoint());
    final int seventeenDaysTwelveHoursInMillisHalf = 86400 * 175 / 10 * 1000;
    ObservationFinder.findObservations(samples, seventeenDaysTwelveHoursInMillisHalf,
                                       seventeenDaysTwelveHoursInMillisHalf, true);
    assertTrue(samples.isEmpty());
}