### Question:
TransitiveTeacherToStaffValidator extends AbstractContextValidator { @Override public Set<String> validate(String entityName, Set<String> staffIds) throws IllegalStateException { if (!areParametersValid(EntityNames.STAFF, entityName, staffIds)) { return Collections.EMPTY_SET; } NeutralQuery basicQuery = new NeutralQuery(new NeutralCriteria("staffReference", NeutralCriteria.CRITERIA_IN, staffIds)); basicQuery.setIncludeFields(Arrays.asList("educationOrganizationReference", "staffReference")); NeutralCriteria endDateCriteria = new NeutralCriteria(ParameterConstants.END_DATE, NeutralCriteria.CRITERIA_GTE, getFilterDate(true)); basicQuery.addOrQuery(new NeutralQuery(new NeutralCriteria(ParameterConstants.END_DATE, NeutralCriteria.CRITERIA_EXISTS, false))); basicQuery.addOrQuery(new NeutralQuery(endDateCriteria)); Iterable<Entity> edOrgAssoc = repo.findAll(EntityNames.STAFF_ED_ORG_ASSOCIATION, basicQuery); Map<String, List<String>> staffEdorgMap = new HashMap<String, List<String>>(); populateMapFromMongoResponse(staffEdorgMap, edOrgAssoc); Set<String> schools = new HashSet<String>(); schools.addAll(getDirectEdorgs()); Set<String> validStaffIds = new HashSet<String>(); for (Map.Entry entry: staffEdorgMap.entrySet()) { List<String> edorgs = (List<String>) entry.getValue(); HashSet<String> tmpSchools = new HashSet<String>(schools); tmpSchools.retainAll(edorgs); if (tmpSchools.size() != 0) { validStaffIds.add((String) entry.getKey()); } } return validStaffIds; }  @Override boolean canValidate(String entityType, boolean transitive); @Override Set<String> validate(String entityName, Set<String> staffIds); @Override SecurityUtil.UserContext getContext();  }### Answer:
@Test public void testInvalidTeacherStaffAssociation() { Set<String> ids = new HashSet<String>(Arrays.asList(staff1.getEntityId())); assertFalse(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testValidTeacherStaffAssociationNoEndDate() { Set<String> ids = new HashSet<String>(Arrays.asList(staff2.getEntityId())); assertTrue(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testValidTeacherStaffAssociationWithEndDate() { Set<String> ids = new HashSet<String>(Arrays.asList(staff3.getEntityId())); assertTrue(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testExpiredTeacherStaffAssociation() { Set<String> ids = new HashSet<String>(Arrays.asList(staff4.getEntityId())); assertFalse(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testStaffWithNoEdorgAssociation() { Set<String> ids = new HashSet<String>(Arrays.asList(staff2.getEntityId(), staff5.getEntityId())); assertFalse(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testMulti1() { Set<String> ids = new HashSet<String>(Arrays.asList(staff1.getEntityId(), staff2.getEntityId(), staff3.getEntityId(), staff4.getEntityId())); assertFalse(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testMulti2() { Set<String> ids = new HashSet<String>(Arrays.asList(staff1.getEntityId(), staff4.getEntityId())); assertFalse(validator.validate(EntityNames.STAFF, ids).equals(ids)); }
@Test public void testMulti3() { Set<String> ids = new HashSet<String>(Arrays.asList(staff2.getEntityId(), staff3.getEntityId())); assertTrue(validator.validate(EntityNames.STAFF, ids).equals(ids)); }