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Code Issues Projects Releases Packages Wiki Activity Actions 9

Mark itertools tests of tuple reuse as being specific to CPython.

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This commit is contained in:
Alex Gaynor 2011-07-17 16:21:30 -07:00
parent 3121547f42
commit e151d21883
1 changed files with 15 additions and 6 deletions
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21
Lib/test/test_itertools.py
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@ -168,7 +168,8 @@ class TestBasicOps(unittest.TestCase):
self.assertEqual(result, list(combinations2(values, r))) # matches second pure python version
self.assertEqual(result, list(combinations3(values, r))) # matches second pure python version
# Test implementation detail: tuple re-use
@support.impl_detail("tuple reuse is specific to CPython")
def test_combinations_tuple_reuse(self):
self.assertEqual(len(set(map(id, combinations('abcde', 3)))), 1)
self.assertNotEqual(len(set(map(id, list(combinations('abcde', 3))))), 1)
@ -238,7 +239,9 @@ class TestBasicOps(unittest.TestCase):
self.assertEqual(result, list(cwr1(values, r))) # matches first pure python version
self.assertEqual(result, list(cwr2(values, r))) # matches second pure python version
# Test implementation detail: tuple re-use
@support.impl_detail("tuple reuse is specific to CPython")
def test_combinations_with_replacement_tuple_reuse(self):
cwr = combinations_with_replacement
self.assertEqual(len(set(map(id, cwr('abcde', 3)))), 1)
self.assertNotEqual(len(set(map(id, list(cwr('abcde', 3))))), 1)
@ -302,7 +305,8 @@ class TestBasicOps(unittest.TestCase):
self.assertEqual(result, list(permutations(values, None))) # test r as None
self.assertEqual(result, list(permutations(values))) # test default r
# Test implementation detail: tuple re-use
@support.impl_detail("tuple resuse is CPython specific")
def test_permutations_tuple_reuse(self):
self.assertEqual(len(set(map(id, permutations('abcde', 3)))), 1)
self.assertNotEqual(len(set(map(id, list(permutations('abcde', 3))))), 1)
@ -566,11 +570,13 @@ class TestBasicOps(unittest.TestCase):
self.assertEqual(list(zip()), lzip())
self.assertRaises(TypeError, zip, 3)
self.assertRaises(TypeError, zip, range(3), 3)
# Check tuple re-use (implementation detail)
self.assertEqual([tuple(list(pair)) for pair in zip('abc', 'def')],
lzip('abc', 'def'))
self.assertEqual([pair for pair in zip('abc', 'def')],
lzip('abc', 'def'))
@support.impl_detail("tuple reuse is specific to CPython")
def test_zip_tuple_reuse(self):
ids = list(map(id, zip('abc', 'def')))
self.assertEqual(min(ids), max(ids))
ids = list(map(id, list(zip('abc', 'def'))))
@ -613,11 +619,13 @@ class TestBasicOps(unittest.TestCase):
else:
self.fail('Did not raise Type in: ' + stmt)
# Check tuple re-use (implementation detail)
self.assertEqual([tuple(list(pair)) for pair in zip_longest('abc', 'def')],
list(zip('abc', 'def')))
self.assertEqual([pair for pair in zip_longest('abc', 'def')],
list(zip('abc', 'def')))
@support.impl_detail("tuple reuse is specific to CPython")
def test_zip_longest_tuple_reuse(self):
ids = list(map(id, zip_longest('abc', 'def')))
self.assertEqual(min(ids), max(ids))
ids = list(map(id, list(zip_longest('abc', 'def'))))
@ -721,7 +729,8 @@ class TestBasicOps(unittest.TestCase):
args = map(iter, args)
self.assertEqual(len(list(product(*args))), expected_len)
# Test implementation detail: tuple re-use
@support.impl_detail("tuple reuse is specific to CPython")
def test_product_tuple_reuse(self):
self.assertEqual(len(set(map(id, product('abc', 'def')))), 1)
self.assertNotEqual(len(set(map(id, list(product('abc', 'def'))))), 1)