1import tempfile
 2import unittest
 3import os
 4from bangaranga import does_the_banga_rang, TheBangaDoesNotRangError
 5
 6class TestDoesTheBangaRang(unittest.TestCase):
 7    def setUp(self):
 8        self.temp_dir = tempfile.TemporaryDirectory()
 9
10    def tearDown(self):
11        self.temp_dir.cleanup()
12
13    def create_file(self, content):
14        file_path = os.path.join(self.temp_dir.name, "bangaranga_input.txt")
15        with open(file_path, "w") as test_file:
16            test_file.write(content)
17
18        return file_path
19
20    def test_returns_zero_when_there_is_no_bangaranga_word(self):
21        file_name = self.create_file("Does the banga rang?")
22        self.assertEqual(does_the_banga_rang(file_name), 0)
23
24    def test_returns_one_when_there_is_one_whole_bangaranga_word(self):
25        file_name = self.create_file("let's bangaranga")
26        self.assertEqual(does_the_banga_rang(file_name), 1)
27
28    def test_returns_two_when_concatenate_two_words_in_one(self):
29        file_name = self.create_file("banga is ranga")
30        self.assertEqual(does_the_banga_rang(file_name), 2)
31
32    def test_returns_three_when_concatenate_three_words_in_one(self):
33        file_name = self.create_file("bang a small ranga")
34        self.assertEqual(does_the_banga_rang(file_name), 3)
35
36    def test_returns_zero_when_bangaranga_is_part_of_another_word(self):
37        file_name = self.create_file("letsbangarangatonight")
38        self.assertEqual(does_the_banga_rang(file_name), 0)
39
40    def test_checks_if_input_is_case_insensitive(self):
41        file_name = self.create_file("BANGARANGA")
42        self.assertEqual(does_the_banga_rang(file_name), 1)
43
44    def test_checks_if_words_are_in_correct_order(self):
45        file_name = self.create_file("ranga is banga")
46        self.assertEqual(does_the_banga_rang(file_name), 0)
47
48    def test_checks_if_return_minimal_count_of_bangaranga_words(self):
49        file_name = self.create_file("bang a banga ranga bangaranga")
50        self.assertEqual(does_the_banga_rang(file_name), 1)
51
52    def test_returns_custom_error_when_file_cannot_be_read(self):
53        file_error = os.path.join(self.temp_dir.name, "file_error.txt")
54        with self.assertRaises(TheBangaDoesNotRangError):
55            does_the_banga_rang(file_error)
56
57if __name__ == "__main__":
58    unittest.main()