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

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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 23:36:35 +01:00
parent 9c4efe571d
commit e0daff1c61
3 changed files with 33 additions and 1 deletions
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19
Lib/test/test_os.py
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@ -90,6 +90,25 @@ 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):