def test_create_genre_dict(self):
Library(self.store, ["Fantasy", "Thriller"])
self.add_books([self.books[0], self.books[1], self.books[2]], Library)
Library.create_genre_dict()
expected_dict = {"Fantasy": [self.books[1], self.books[0]],
"Thriller": [self.books[2]]}
self.assertEqual(expected_dict, Library.genre_dict)
Library.add_book(self.books[3])
expected_dict["Thriller"].append(self.books[3])
self.assertEqual(expected_dict, Library.genre_dict)
os.remove(os.path.realpath(self.store))
