def METHOD_NAME(self):
    expected_result_1 = 'path_1/path_2'
    expected_result_2 = 'path_1/path_2/'
    expected_result_3 = '/path_1/path_2'
    expected_result_4 = '/path_1/path_2/'
    self.assertEqual(expected_result_1, urljoin('path_1', 'path_2'))
    self.assertEqual(expected_result_1, urljoin('path_1/', 'path_2'))
    self.assertEqual(expected_result_1, urljoin('path_1', '/path_2'))
    self.assertEqual(expected_result_1, urljoin('path_1/', '/path_2'))
    self.assertEqual(expected_result_2, urljoin('path_1', 'path_2/'))
    self.assertEqual(expected_result_2, urljoin('path_1/', 'path_2/'))
    self.assertEqual(expected_result_2, urljoin('path_1', '/path_2/'))
    self.assertEqual(expected_result_2, urljoin('path_1/', '/path_2/'))
    self.assertEqual(expected_result_3, urljoin('/path_1', 'path_2'))
    self.assertEqual(expected_result_3, urljoin('/path_1/', 'path_2'))
    self.assertEqual(expected_result_3, urljoin('/path_1', '/path_2'))
    self.assertEqual(expected_result_3, urljoin('/path_1/', '/path_2'))
    self.assertEqual(expected_result_4, urljoin('/path_1', 'path_2/'))
    self.assertEqual(expected_result_4, urljoin('/path_1/', 'path_2/'))
    self.assertEqual(expected_result_4, urljoin('/path_1', '/path_2/'))
    self.assertEqual(expected_result_4, urljoin('/path_1/', '/path_2/'))