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bpo-38018: fix test for multiprocessing.shared_memory #15821

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Merged
pablogsal merged 1 commit into from
Sep 10, 2019
Merged

bpo-38018: fix test for multiprocessing.shared_memory #15821

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9 changes: 7 additions & 2 deletions Lib/test/_test_multiprocessing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3732,16 +3732,21 @@ def test_shared_memory_basics(self):
with unittest.mock.patch(
'multiprocessing.shared_memory._make_filename') as mock_make_filename:

NAME_PREFIX = shared_memory._SHM_NAME_PREFIX
names = ['test01_fn', 'test02_fn']
# Prepend NAME_PREFIX which can be '/psm_' or 'wnsm_', necessary
# because some POSIX compliant systems require name to start with /
names = [NAME_PREFIX + name for name in names]

mock_make_filename.side_effect = names
shm1 = shared_memory.SharedMemory(create=True, size=1)
self.addCleanup(shm1.unlink)
self.assertEqual(shm1.name, names[0])
self.assertEqual(shm1._name, names[0])

mock_make_filename.side_effect = names
shm2 = shared_memory.SharedMemory(create=True, size=1)
self.addCleanup(shm2.unlink)
self.assertEqual(shm2.name, names[1])
self.assertEqual(shm2._name, names[1])

if shared_memory._USE_POSIX:
# Posix Shared Memory can only be unlinked once. Here we
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