bpo-34953: Implement `mmap.mmap.__repr__` (GH-9891)
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py
index 88c501d..5400f25 100644
--- a/Lib/test/test_mmap.py
+++ b/Lib/test/test_mmap.py
@@ -740,6 +740,42 @@
# 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