@Test
public void emptyListTest() {

    List<Map<String, String>> emptyList = new LinkedList<>();
    RangeExtension rangeExtension = new RangeExtension();
    RangeExtension.RangeTag rangeTag = new RangeExtension.RangeTag();
    rangeTag.setName("var_out_test");
    rangeTag.setFrom("1");
    rangeTag.setTo("5");
    rangeTag.setStep("0.7");
    List<Map<String, String>> resultList = rangeExtension.pipelinePossibleStates(rangeTag, emptyList);
    Assert.assertNotNull(resultList);
    Assert.assertEquals(0, resultList.size());
}