def test_adding_to_non_set_raises_attribute_error(self):
with self.assertRaises(AttributeError):
transduce(Transducer,
adding(),
(23, 78),
init=tuple())
def test_two_items_returns_two_element_list(self):
result = transduce(Transducer,
adding(),
[23, 78])
self.assertEqual(result, {23, 78})
def test_adding_reducer(self):
result = transduce(transducer=mapping(lambda x: x * x),
reducer=adding(),
iterable=list(range(3)) * 2)
self.assertListEqual(list(result), [0, 1, 4])
def test_zero_items_returns_initial_empty_set(self):
result = transduce(Transducer,
adding(),
empty_iter())
self.assertEqual(result, set())
def test_adding_reducer(self):
result = transduce(
transducer=mapping(lambda x: x * x),
reducer=adding(),
iterable=list(range(3)) * 2)
self.assertListEqual(list(result), [0, 1, 4])
