def test_few_numbers_from_the_list_are_even(self):
numbers = [3, 6, 1, 1, 8, 3, 4]
evens_amount = count_even_numbers(numbers)
self.assertEqual(evens_amount, 3)
def test_numbers_with_zero_inside_the_list(self):
numbers = [3, 16, 0, 1, 4, 0, 23]
evens_amount = count_even_numbers(numbers)
self.assertEqual(evens_amount, 4)
def test_no_even_numbers_in_the_list(self):
numbers = [55, 7, 19, 21]
evens_amount = count_even_numbers(numbers)
self.assertEqual(evens_amount, 0)
def test_no_numbers_in_the_list_and_no_evens(self):
numbers = []
evens_amount = count_even_numbers(numbers)
self.assertEqual(evens_amount, 0)
def test_all_numbers_from_the_list_are_even(self):
numbers = [2, 4, 6, 8, 10]
evens_amount = count_even_numbers(numbers)
self.assertEqual(evens_amount, 5)