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Diffstat (limited to 'Lib/test/test_mmap.py')
| -rw-r--r-- | Lib/test/test_mmap.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py index f3f70cc251..56d85e75f8 100644 --- a/Lib/test/test_mmap.py +++ b/Lib/test/test_mmap.py @@ -713,6 +713,13 @@ class MmapTests(unittest.TestCase): gc_collect() self.assertIs(wr(), None) + def test_write_returning_the_number_of_bytes_written(self): + mm = mmap.mmap(-1, 16) + self.assertEqual(mm.write(b""), 0) + self.assertEqual(mm.write(b"x"), 1) + self.assertEqual(mm.write(b"yz"), 2) + self.assertEqual(mm.write(b"python"), 6) + @unittest.skipIf(os.name == 'nt', 'cannot resize anonymous mmaps on Windows') def test_resize_past_pos(self): m = mmap.mmap(-1, 8192) |