mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-10 03:49:18 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

[3.12] gh-115059: Flush the underlying write buffer in io.BufferedRandom.read1() (GH-115163) (GH-115205)

Browse source 
(cherry picked from commit 846fd721d5)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-02-09 12:00:35 +01:00 • committed by GitHub
parent 235c54fe9c
commit 0211f919b1
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
3 changed files with 63 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

52
Lib/test/test_io.py
View file

@ -2506,6 +2506,28 @@ class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
f.flush()
self.assertEqual(raw.getvalue(), b'a2c')
def test_read1_after_write(self):
with self.BytesIO(b'abcdef') as raw:
with self.tp(raw, 3) as f:
f.write(b"1")
self.assertEqual(f.read1(1), b'b')
f.flush()
self.assertEqual(raw.getvalue(), b'1bcdef')
with self.BytesIO(b'abcdef') as raw:
with self.tp(raw, 3) as f:
f.write(b"1")
self.assertEqual(f.read1(), b'bcd')
f.flush()
self.assertEqual(raw.getvalue(), b'1bcdef')
with self.BytesIO(b'abcdef') as raw:
with self.tp(raw, 3) as f:
f.write(b"1")
# XXX: read(100) returns different numbers of bytes
# in Python and C implementations.
self.assertEqual(f.read1(100)[:3], b'bcd')
f.flush()
self.assertEqual(raw.getvalue(), b'1bcdef')
def test_interleaved_readline_write(self):
with self.BytesIO(b'ab\ncdef\ng\n') as raw:
with self.tp(raw) as f:
@ -2518,6 +2540,36 @@ class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
f.flush()
self.assertEqual(raw.getvalue(), b'1b\n2def\n3\n')
def test_xxx(self):
with self.BytesIO(b'abcdefgh') as raw:
with self.tp(raw) as f:
f.write(b'123')
self.assertEqual(f.read(), b'defgh')
f.write(b'456')
f.flush()
self.assertEqual(raw.getvalue(), b'123defgh456')
with self.BytesIO(b'abcdefgh') as raw:
with self.tp(raw) as f:
f.write(b'123')
self.assertEqual(f.read(3), b'def')
f.write(b'456')
f.flush()
self.assertEqual(raw.getvalue(), b'123def456')
with self.BytesIO(b'abcdefgh') as raw:
with self.tp(raw) as f:
f.write(b'123')
self.assertEqual(f.read1(), b'defgh')
f.write(b'456')
f.flush()
self.assertEqual(raw.getvalue(), b'123defgh456')
with self.BytesIO(b'abcdefgh') as raw:
with self.tp(raw) as f:
f.write(b'123')
self.assertEqual(f.read1(3), b'def')
f.write(b'456')
f.flush()
self.assertEqual(raw.getvalue(), b'123def456')
# You can't construct a BufferedRandom over a non-seekable stream.
test_unseekable = None