### Question:
TeacherToStaffEdOrgAssociationValidator extends AbstractContextValidator { @Override public Set<String> validate(String entityType, Set<String> ids) throws IllegalStateException { if (!areParametersValid(EntityNames.STAFF_ED_ORG_ASSOCIATION, entityType, ids)) { return Collections.EMPTY_SET; } NeutralQuery query = new NeutralQuery(new NeutralCriteria(ParameterConstants.STAFF_REFERENCE, NeutralCriteria.OPERATOR_EQUAL, SecurityUtil.principalId())); Iterable<Entity> entities = this.repo.findAll(EntityNames.STAFF_ED_ORG_ASSOCIATION, query); Set<String> validIds = new HashSet<String>(); for (Entity entity : entities) { if (!dateHelper.isFieldExpired(entity.getBody(), ParameterConstants.END_DATE)) { validIds.add(entity.getEntityId()); } } validIds.retainAll(ids); return validIds; }  @Override boolean canValidate(String entityType, boolean isTransitive); @Override Set<String> validate(String entityType, Set<String> ids); @Override SecurityUtil.UserContext getContext();  }### Answer:
@Test public void testCanValidateNonExpiredAssociation() { Set<String> edOrgAssociationIds = new HashSet<String>(); Entity assoc = helper.generateStaffEdorg(helper.STAFF_ID, helper.ED_ORG_ID, false); edOrgAssociationIds.add(assoc.getEntityId()); assertTrue(validator.validate(EntityNames.STAFF_ED_ORG_ASSOCIATION, edOrgAssociationIds).containsAll(edOrgAssociationIds)); }
@Test public void testInvalidateExpiredAssociation() { Set<String> edOrgAssociationIds = new HashSet<String>(); Entity assoc = helper.generateStaffEdorg(helper.STAFF_ID, helper.ED_ORG_ID, true); edOrgAssociationIds.add(assoc.getEntityId()); assertFalse(validator.validate(EntityNames.STAFF_ED_ORG_ASSOCIATION, edOrgAssociationIds).containsAll(edOrgAssociationIds)); }