def test_my_sum__when_strings__expect_value_exception(self):
numbers = ['a', 'b', 'c']
with self.assertRaises(ValueError) as context:
my_sum(numbers)
expected_message = '`numbers` should be ints or floats'
actual_message = context.exception.args[0]
self.assertEqual(expected_message, actual_message)
def test_my_sum__when_strings__expect_value_exception(self):
numbers = ['a', 'b', 'c']
with self.assertRaises(ValueError) as context:
my_sum(numbers)
def test_my_sum__when_floats__expect_to_be_equal(self):
numbers = [1.0, 2.0, 3.0, 4.0]
actual_result = my_sum(numbers)
expected_result = 10.0
self.assertEqual(expected_result, actual_result)
def test_my_sum__when_ints__expect_to_be_equal(self):
numbers = [1, 2, 3, 4]
actual_result = my_sum(numbers)
expected_result = 10
self.assertEqual(expected_result, actual_result)