@Test
public void testGetRelevantNwpDirs_oneMeasurement() throws IOException {

    when(array.getSize()).thenReturn(1L);
    when(array.getInt(0)).thenReturn(118302044);
    final List<String> relevantNwpDirs = NwpUtil.getRelevantNwpDirs(variable, null);
    assertNotNull(relevantNwpDirs);
    assertEquals(6, relevantNwpDirs.size());
    assertEquals("1981/09/28", relevantNwpDirs.get(0));
    assertEquals("1981/10/01", relevantNwpDirs.get(3));
    assertEquals("1981/10/03", relevantNwpDirs.get(5));
}