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(merge) Issue #11395: io.FileIO().write() clamps the data length to 32,767

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bytes on Windows if the file is a TTY to workaround a Windows bug. The Windows
console returns an error (12: not enough space error) on writing into stdout if
stdout mode is binary and the length is greater than 66,000 bytes (or less,
depending on heap usage).
This commit is contained in:
Victor Stinner 2011-03-20 23:37:55 +01:00
commit b938bcd211
3 changed files with 33 additions and 1 deletions
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19
Lib/test/test_os.py
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@ -97,6 +97,25 @@ class FileTests(unittest.TestCase):
self.assertEqual(fobj.read().splitlines(),
[b"bacon", b"eggs", b"spam"])
def write_windows_console(self, *args):
retcode = subprocess.call(args,
# use a new console to not flood the test output
creationflags=subprocess.CREATE_NEW_CONSOLE,
# use a shell to hide the console window (SW_HIDE)
shell=True)
self.assertEqual(retcode, 0)
@unittest.skipUnless(sys.platform == 'win32',
'test specific to the Windows console')
def test_write_windows_console(self):
# Issue #11395: the Windows console returns an error (12: not enough
# space error) on writing into stdout if stdout mode is binary and the
# length is greater than 66,000 bytes (or less, depending on heap
# usage).
code = "print('x' * 100000)"
self.write_windows_console(sys.executable, "-c", code)
self.write_windows_console(sys.executable, "-u", "-c", code)
class TemporaryFileTests(unittest.TestCase):
def setUp(self):