1import unittest
 2from secret import validate_recipe, RuinedNikuldenDinnerError 
 3from unittest.mock import mock_open, patch
 4
 5class TestNikuldenValidator(unittest.TestCase):
 6
 7    def test_valid_recipe(self):
 8        VALID_MOCK_FILE_CONTENT = "Днес ще ядем ли риба или рибена супа?"
 9        mock_object = mock_open(read_data=VALID_MOCK_FILE_CONTENT)
10        with patch("builtins.open", mock_object):
11            lines = validate_recipe("valid_recipe.txt")
12        self.assertTrue(lines)
13
14    def test_invalid_recipe(self):
15        INVALID_MOCK_FILE_CONTENT = "Какво ще ядем?"
16        mock_object = mock_open(read_data=INVALID_MOCK_FILE_CONTENT)
17        with patch("builtins.open", mock_object):
18            lines = validate_recipe("invalid_recipe.txt")
19        self.assertFalse(lines)
20
21    def test_bad_recipe_file(self):
22        with patch("builtins.open", side_effect=OSError):
23            with self.assertRaises(RuinedNikuldenDinnerError):
24                validate_recipe("not_found_recipe.txt")
25
26        VALID_MOCK_FILE_CONTENT = "Днес ще ядем ли риба или рибена супа?"
27        mock_object = mock_open(read_data=VALID_MOCK_FILE_CONTENT)
28        with patch("builtins.open", mock_object) as mock_file:
29            mock_file.return_value.read.side_effect = IOError
30            with self.assertRaises(RuinedNikuldenDinnerError):
31                validate_recipe("not_found_recipe.txt")
32
33if __name__ == "__main__":
34    unittest.main()