def test_calculate_class_average(self, mock_stdout, mock_input):
crud.file_write([])
crud.add_student()
crud.add_student()
crud.add_student()
crud.calculate_class_average()
self.assertTrue("15", mock_stdout.getvalue())
crud.file_write([])
def test_calculate_class_average_return_type(self):
mock_file = "Chris Hemsworth A54621542 True 85 68 94\n" \
"Ryan Gosling A01245685 True 87 74\n" \
"Chris Evans A04561325 True 85 74 82\n" \
"Tom Holland A01236589 False\n"
with patch('builtins.open', mock_open(read_data=mock_file)):
self.assertIsInstance(calculate_class_average(), float)
def test_calculate_class_average_empty_database(self, mock_stdout):
crud.file_write([])
crud.calculate_class_average()
self.assertTrue("No available grades" in mock_stdout.getvalue())
def test_calculate_class_average_no_grades(self, mock_stdout, mock_input):
crud.file_write([])
crud.add_student()
crud.calculate_class_average()
self.assertTrue("No available grades" in mock_stdout.getvalue())
crud.file_write([])
def test_calculate_class_average_exclude_students_with_no_grades(self):
mock_file = "Chris Hemsworth A54621542 True 100 50\n" \
"Ryan Gosling A01245685 True\n"
with patch('builtins.open', mock_open(read_data=mock_file)):
self.assertEqual(calculate_class_average(), 75.00)
def test_calculate_class_average_correct_value(self):
mock_file = "Chris Hemsworth A54621542 True 100 50\n" \
"Ryan Gosling A01245685 True 90\n"
with patch('builtins.open', mock_open(read_data=mock_file)):
self.assertEqual(calculate_class_average(), 82.50)