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Cown: Add new tests for releasing open regions #2

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Merged
CaQtiml merged 1 commit into from
Jan 26, 2026
Merged

Cown: Add new tests for releasing open regions #2

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24 changes: 24 additions & 0 deletions Lib/test/test_regions/test_cown.py
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Original file line number Diff line number Diff line change
Expand Up @@ -147,3 +147,27 @@ def other_thread():

# Cleanup
t2.join()

def test_release_fails_for_open_regions(self):
r = Region()
c = Cown(r)

# Releasing a cown with an open region should error
with self.assertRaises(RuntimeError):
c.release()

r = None

# This release should succeed, since `r` should be closed
c.release()

def test_release_cleans_region(self):
c = Cown(Region())
c.value._make_dirty()

self.assertTrue(c.value.is_dirty)

# Releasing the cown should clean the region first in an
# attempt to close it
with self.assertRaises(RuntimeError):
c.release()