### Question:
TeacherToCourseTranscriptValidator extends AbstractContextValidator { @Override public Set<String> validate(String entityType, Set<String> ids) throws IllegalStateException { if (!areParametersValid(EntityNames.COURSE_TRANSCRIPT, entityType, ids)) { return Collections.emptySet(); } Map<String, Set<String>> studentAcademicRecordToCT = new HashMap<String, Set<String>>(); NeutralQuery query = new NeutralQuery(new NeutralCriteria(ParameterConstants.ID, NeutralCriteria.CRITERIA_IN, new ArrayList<String>(ids))); Iterable<Entity> entities = getRepo().findAll(EntityNames.COURSE_TRANSCRIPT, query); for (Entity entity : entities) { Map<String, Object> body = entity.getBody(); if (body.get(ParameterConstants.STUDENT_ACADEMIC_RECORD_ID) instanceof String) { String id = (String) body.get(ParameterConstants.STUDENT_ACADEMIC_RECORD_ID); if (!studentAcademicRecordToCT.containsKey(id)) { studentAcademicRecordToCT.put(id, new HashSet<String>()); } studentAcademicRecordToCT.get(id).add(entity.getEntityId()); } else { LOG.warn("Possible Corrupt Data detected at "+entityType+"/"+entity.getEntityId()); } } if (studentAcademicRecordToCT.isEmpty()) { return Collections.EMPTY_SET; } Set<String> sarIds = validator.validate(EntityNames.STUDENT_ACADEMIC_RECORD, studentAcademicRecordToCT.keySet()); return getValidIds(sarIds, studentAcademicRecordToCT); }  @Override boolean canValidate(String entityType, boolean isTransitive); @Override Set<String> validate(String entityType, Set<String> ids); @Override SecurityUtil.UserContext getContext();  }### Answer:
@Test public void testValidAssociations() { setupCurrentUser(teacher1); Assert.assertEquals(1, validator.validate(EntityNames.COURSE_TRANSCRIPT, new HashSet<String>(Arrays.asList(courseTranscript1.getEntityId()))).size()); }
@Test public void testInvalidAssociations() { setupCurrentUser(teacher1); Assert.assertEquals(0, validator.validate(EntityNames.COURSE_TRANSCRIPT, new HashSet<String>(Arrays.asList(UUID.randomUUID().toString()))).size()); Assert.assertEquals(0, validator.validate(EntityNames.COURSE_TRANSCRIPT, new HashSet<String>()).size()); Assert.assertEquals(0, validator.validate(EntityNames.COURSE_TRANSCRIPT, new HashSet<String>(Arrays.asList(courseTranscript2.getEntityId()))).size()); }