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Code Issues Projects Releases Packages Wiki Activity Actions 17

bpo-34953: Implement mmap.mmap.__repr__ (GH-9891)

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Taine Zhao 2019-10-17 18:41:35 +08:00 • committed by Xiang Zhang
parent 9c11029bb4
commit d8ca2354ed
2 changed files with 93 additions and 12 deletions
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36
Lib/test/test_mmap.py
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@ -740,6 +740,42 @@ class MmapTests(unittest.TestCase):
# See bpo-34754 for details.
self.assertRaises(OSError, mm.flush, 1, len(b'python'))
def test_repr(self):
open_mmap_repr_pat = re.compile(
r"<mmap.mmap closed=False, "
r"access=(?P<access>\S+), "
r"length=(?P<length>\d+), "
r"pos=(?P<pos>\d+), "
r"offset=(?P<offset>\d+)>")
closed_mmap_repr_pat = re.compile(r"<mmap.mmap closed=True>")
mapsizes = (50, 100, 1_000, 1_000_000, 10_000_000)
offsets = tuple((mapsize // 2 // mmap.ALLOCATIONGRANULARITY)
* mmap.ALLOCATIONGRANULARITY for mapsize in mapsizes)
for offset, mapsize in zip(offsets, mapsizes):
data = b'a' * mapsize
length = mapsize - offset
accesses = ('ACCESS_DEFAULT', 'ACCESS_READ',
'ACCESS_COPY', 'ACCESS_WRITE')
positions = (0, length//10, length//5, length//4)
with open(TESTFN, "wb+") as fp:
fp.write(data)
fp.flush()
for access, pos in itertools.product(accesses, positions):
accint = getattr(mmap, access)
with mmap.mmap(fp.fileno(),
length,
access=accint,
offset=offset) as mm:
mm.seek(pos)
match = open_mmap_repr_pat.match(repr(mm))
self.assertIsNotNone(match)
self.assertEqual(match.group('access'), access)
self.assertEqual(match.group('length'), str(length))
self.assertEqual(match.group('pos'), str(pos))
self.assertEqual(match.group('offset'), str(offset))
match = closed_mmap_repr_pat.match(repr(mm))
self.assertIsNotNone(match)
@unittest.skipUnless(hasattr(mmap.mmap, 'madvise'), 'needs madvise')
def test_madvise(self):
size = 2 * PAGESIZE