def test_three_item_iterable_sends_three_items(self):
items = [4, 7, 2, 1, 4]
collection = CollectingSink()
sink = collection()
iterable_source(items, sink)
result = list(collection)
self.assertListEqual(result, items)
def test_three_item_iterable_sends_three_items(self):
items = [4, 7, 2, 1, 4]
collection = CollectingSink()
sink = collection()
iterable_source(items, sink)
result = list(collection)
self.assertListEqual(result, items)
def test_early_terminating_transducer(self):
input = [0.0, 0.2, 0.8, 0.9, 1.1, 2.3, 2.6, 3.0, 4.1]
output = SingularSink()
iterable_source(iterable=input,
target=transduce(first(lambda x: x > 1.0),
target=output()))
self.assertEqual(output.value, 1.1)
def test_early_terminating_transducer(self):
input = [0.0, 0.2, 0.8, 0.9, 1.1, 2.3, 2.6, 3.0, 4.1]
output = SingularSink()
iterable_source(iterable=input,
target=transduce(first(lambda x: x > 1.0),
target=output()))
self.assertEqual(output.value, 1.1)
def test_chained_transducers(self):
input = [0.0, 0.2, 0.8, 0.9, 1.1, 2.3, 2.6, 3.0, 4.1]
output = CollectingSink()
iterable_source(iterable=input,
target=transduce(
compose(pairwise(),
mapping(lambda p: p[1] - p[0]),
filtering(lambda d: d < 0.5),
mapping(lambda _: "double-click")),
target=output()))
result = list(output)
self.assertListEqual(result, ['double-click', 'double-click', 'double-click', 'double-click', 'double-click'])
def test_chained_transducers(self):
input = [0.0, 0.2, 0.8, 0.9, 1.1, 2.3, 2.6, 3.0, 4.1]
output = CollectingSink()
iterable_source(iterable=input,
target=transduce(compose(
pairwise(), mapping(lambda p: p[1] - p[0]),
filtering(lambda d: d < 0.5),
mapping(lambda _: "double-click")),
target=output()))
result = list(output)
self.assertListEqual(result, [
'double-click', 'double-click', 'double-click', 'double-click',
'double-click'
])
def test_empty_iterable_sends_no_items(self):
collection = CollectingSink()
sink = collection()
iterable_source([], sink)
self.assertEqual(len(collection), 0)
def test_all_consumed_exits_with_empty_iterator(self):
items = [4, 7, 2, 1, 4]
collection = CollectingSink()
sink = collection()
remaining = iterable_source(items, sink)
self.assertIsNone(iterator_or_none(remaining))
def test_closed_target_exits_with_remaining_items(self):
items = [4, 7, 2, 1, 4]
collection = SingularSink()
sink = collection()
remaining = iterable_source(items, sink)
self.assertListEqual(list(remaining), [7, 2, 1, 4])
def test_empty_iterable_sends_no_items(self):
collection = CollectingSink()
sink = collection()
iterable_source([], sink)
self.assertEqual(len(collection), 0)
def test_all_consumed_exits_with_empty_iterator(self):
items = [4, 7, 2, 1, 4]
collection = CollectingSink()
sink = collection()
remaining = iterable_source(items, sink)
self.assertIsNone(iterator_or_none(remaining))
def test_closed_target_exits_with_remaining_items(self):
items = [4, 7, 2, 1, 4]
collection = SingularSink()
sink = collection()
remaining = iterable_source(items, sink)
self.assertListEqual(list(remaining), [7, 2, 1, 4])