def test_add_alias_empty_alias(self):
#ARRANGE
instructor = Instructor()
instructor.aliases = ''
new_alias = ' Instructor_A '
#ACT
instructor.add_alias(new_alias)
new_aliases_list = instructor.aliases_list
#ASSERT
self.assertIsNotNone(new_aliases_list)
self.assertEqual(len(new_aliases_list), 1)
self.assertIn('Instructor_A', new_aliases_list)
def test_add_alias_duplicate_alias(self):
#ARRANGE
instructor = Instructor()
instructor.aliases = 'Aimee McCabe - Karr; Teacher 1; Instructor_A'
new_alias = ' instructor_a '
#ACT
instructor.add_alias(new_alias)
new_aliases_list = instructor.aliases_list
#ASSERT
self.assertIsNotNone(new_aliases_list)
self.assertEqual(len(new_aliases_list), 3)
self.assertIn('Aimee McCabe - Karr', new_aliases_list)
self.assertIn('Teacher 1', new_aliases_list)
self.assertIn('Instructor_A', new_aliases_list)