diff options
Diffstat (limited to 'Lib/test/test_itertools.py')
| -rw-r--r-- | Lib/test/test_itertools.py | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py index 97feb7b..ccdbf8a 100644 --- a/Lib/test/test_itertools.py +++ b/Lib/test/test_itertools.py @@ -137,7 +137,8 @@ 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 + @test_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) @@ -207,7 +208,9 @@ 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 + @test_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) @@ -271,7 +274,8 @@ 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 + @test_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) @@ -526,11 +530,13 @@ class TestBasicOps(unittest.TestCase): self.assertEqual(list(izip()), zip()) self.assertRaises(TypeError, izip, 3) self.assertRaises(TypeError, izip, range(3), 3) - # Check tuple re-use (implementation detail) self.assertEqual([tuple(list(pair)) for pair in izip('abc', 'def')], zip('abc', 'def')) self.assertEqual([pair for pair in izip('abc', 'def')], zip('abc', 'def')) + + @test_support.impl_detail("tuple reuse is specific to CPython") + def test_izip_tuple_resuse(self): ids = map(id, izip('abc', 'def')) self.assertEqual(min(ids), max(ids)) ids = map(id, list(izip('abc', 'def'))) @@ -575,11 +581,13 @@ 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 izip_longest('abc', 'def')], zip('abc', 'def')) self.assertEqual([pair for pair in izip_longest('abc', 'def')], zip('abc', 'def')) + + @test_support.impl_detail("tuple reuse is specific to CPython") + def test_izip_longest_tuple_reuse(self): ids = map(id, izip_longest('abc', 'def')) self.assertEqual(min(ids), max(ids)) ids = map(id, list(izip_longest('abc', 'def'))) @@ -683,7 +691,8 @@ class TestBasicOps(unittest.TestCase): args = map(iter, args) self.assertEqual(len(list(product(*args))), expected_len) - # Test implementation detail: tuple re-use + @test_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) |