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bpo-30404: The -u option now makes the stdout and stderr streams totally unbuffered. (#1667)

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This commit is contained in:
Serhiy Storchaka 2017-10-04 20:25:40 +03:00 • committed by GitHub
parent 0b5e61ddca
commit 77732be801
4 changed files with 17 additions and 12 deletions
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7
Lib/test/test_cmd_line.py
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@ -221,13 +221,12 @@ class CmdLineTest(unittest.TestCase):
rc, out, err = assert_python_ok('-u', '-c', code)
data = err if stream == 'stderr' else out
self.assertEqual(data, b'x', "binary %s not unbuffered" % stream)
# Text is line-buffered
code = ("import os, sys; sys.%s.write('x\\n'); os._exit(0)"
# Text is unbuffered
code = ("import os, sys; sys.%s.write('x'); os._exit(0)"
% stream)
rc, out, err = assert_python_ok('-u', '-c', code)
data = err if stream == 'stderr' else out
self.assertEqual(data.strip(), b'x',
"text %s not line-buffered" % stream)
self.assertEqual(data, b'x', "text %s not unbuffered" % stream)
def test_unbuffered_input(self):
# sys.stdin still works with '-u'