def test_three_valid_args_passed(self):
"""
my_islice(iterable, start, stop[, step]) --> my_islice generator
"""
reference_iterator = islice(fibonacci(), 3, 10)
under_test_generator = my_islice(fibonacci(), 3, 10)
self.assertEqual(list(reference_iterator), list(under_test_generator))
def test_five_arguments_passed(self):
with self.assertRaises(TypeError):
iterator = islice(fibonacci(), 0, 10, 2, 5)
with self.assertRaises(TypeError):
iterator = my_islice(fibonacci(), 0, 10, 2, 5)
next(iterator)
def test_one_argument_passed(self):
with self.assertRaises(TypeError):
iterator = islice(fibonacci())
with self.assertRaises(TypeError):
iterator = my_islice(fibonacci()) # returns a generator
next(iterator)