1import unittest
 2from unittest.mock import patch, mock_open
 3from secret import validate_recipe, RuinedNikuldenDinnerError
 4from itertools import product
 5
 6
 7class TestNikuldenValidator(unittest.TestCase):
 8    def test_valid_recipe(self) -> None:
 9        valid_words = ["риба", "рибена", "шаран", "сьонга"]
10        case_insensitive_words = []
11        generate = lambda word: ["".join(p) for p in product(*((c.lower(), c.upper()) for c in word))]
12        for word in valid_words:
13            case_insensitive_words.extend(generate(word))
14
15        for word in case_insensitive_words:
16            with patch("builtins.open", mock_open(read_data=f"Валидна рецепта с {word}")):
17                self.assertTrue(validate_recipe("valid_recipe.txt"))
18
19    def test_invalid_recipe(self):
20        recipe = "Супер мега невалидна рецепта за сьомга"
21        with patch("builtins.open", mock_open(read_data=recipe)):
22            self.assertFalse(validate_recipe("invalid_recipe.txt"))
23
24    def test_bad_recipe_file(self):
25        for error in [OSError, IOError]:
26            with patch("builtins.open", side_effect=error):
27                with self.assertRaises(RuinedNikuldenDinnerError):
28                    validate_recipe("bad_test_file.txt")
29
30
31if __name__ == "__main__":
32    unittest.main()