@Test
public void evaluateShouldReturnAllPatientsThatHaveNeverTakenListedDrugs() throws Exception {

	List drugSetList = new ArrayList<Concept>();
	drugSetList.add(new Concept(88));
	drugSetList.add(new Concept(792));
	cohortDefinition.setDrugSets(drugSetList);
	cohortDefinition.setWhich(Match.NONE);
	Cohort cohort = Context.getService(CohortDefinitionService.class).evaluate(cohortDefinition, null);
	Assert.assertTrue(cohort.contains(8));
	Assert.assertTrue(cohort.contains(21));
	Assert.assertTrue(cohort.contains(22));
	Assert.assertEquals(3, cohort.size());
}