def minmax_y(self):
def r(accu, item):
min_y = min(accu[0], item[0])
max_y = max(accu[1], item[1])
return min_y, max_y
minmax_accu = transduce(transducer=pipe(
mapping(lambda p: p.minmax_y()), reducing(r)),
reducer=expecting_single(),
iterable=self.paths)
return minmax_accu
def test_counting_with_predicate(self):
result = transduce(transducer=counting(lambda w: 'o' in w),
reducer=expecting_single(),
iterable="The quick brown fox jumped".split())
self.assertEqual(result, 2)
def test_counting(self):
result = transduce(transducer=counting(),
reducer=expecting_single(),
iterable="The quick brown fox jumped".split())
self.assertEqual(result, 5)
def test_last_with_predicate(self):
result = transduce(transducer=last(lambda x: x < 7),
reducer=expecting_single(),
iterable=[2, 4, 6, 8, 10])
self.assertEqual(result, 6)
def test_last(self):
result = transduce(transducer=last(),
reducer=expecting_single(),
iterable=[2, 4, 6, 8, 10])
self.assertEqual(result, 10)
def test_element_at_too_short(self):
with self.assertRaises(IndexError):
transduce(transducer=element_at(3),
reducer=expecting_single(),
iterable=[1, 3, 5])
def test_element_at_validation(self):
with self.assertRaises(IndexError):
transduce(transducer=element_at(-1),
reducer=expecting_single(),
iterable=[1, 3, 5, 7, 9])
def test_exactly_one_item(self):
result = transduce(mapping(lambda x: x*x),
expecting_single(),
[42])
self.assertEqual(result, 1764)
def test_reducing_with_init(self):
result = transduce(transducer=reducing(operator.add, 10),
reducer=expecting_single(),
iterable=range(10))
self.assertEqual(result, 55)
def test_counting_with_predicate(self):
result = transduce(transducer=counting(lambda w: 'o' in w),
reducer=expecting_single(),
iterable="The quick brown fox jumped".split())
self.assertEqual(result, 2)
def test_counting(self):
result = transduce(transducer=counting(),
reducer=expecting_single(),
iterable="The quick brown fox jumped".split())
self.assertEqual(result, 5)
def test_last_with_predicate(self):
result = transduce(transducer=last(lambda x: x < 7),
reducer=expecting_single(),
iterable=[2, 4, 6, 8, 10])
self.assertEqual(result, 6)
def test_last(self):
result = transduce(transducer=last(),
reducer=expecting_single(),
iterable=[2, 4, 6, 8, 10])
self.assertEqual(result, 10)
def test_element_at_too_short(self):
with self.assertRaises(IndexError):
transduce(transducer=element_at(3),
reducer=expecting_single(),
iterable=[1, 3, 5])
def test_reducing_with_init(self):
result = transduce(transducer=reducing(operator.add, 10),
reducer=expecting_single(),
iterable=range(10))
self.assertEqual(result, 55)
def test_element_at(self):
result = transduce(transducer=element_at(3),
reducer=expecting_single(),
iterable=[1, 3, 5, 7, 9])
self.assertEqual(result, 7)
def test_element_at_validation(self):
with self.assertRaises(IndexError):
transduce(transducer=element_at(-1),
reducer=expecting_single(),
iterable=[1, 3, 5, 7, 9])
def test_too_many_items(self):
with self.assertRaises(RuntimeError):
transduce(mapping(lambda x: x*x),
expecting_single(),
[])
def test_element_at(self):
result = transduce(transducer=element_at(3),
reducer=expecting_single(),
iterable=[1, 3, 5, 7, 9])
self.assertEqual(result, 7)
