def _test_controller_isDuplicate(self):
'''
Tests if finding a duplicate in the repository works
'''
repository = Repository()
controller = Controller(repository)
Repository.push(repository, Student("john", 1))
Repository.push(repository, "Test QA")
assert Controller.isDuplicate(controller, 1, "studentID") == 0
assert Controller.isDuplicate(controller, 2, "studentID") == -1
assert Controller.isDuplicate(controller, "Test QA", "discipline") == 1
assert Controller.isDuplicate(controller, "Tester QA", "discipline") == -1
assert Controller.isDuplicate(controller, 1, "???") == -1
assert Controller.isDuplicate(controller, "78", "studentID") == -1
