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Issue #5870: Add subprocess.DEVNULL constant.

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This commit is contained in:
Ross Lagerwall 2011-03-16 18:40:25 +02:00
parent 09bb8f46aa
commit ba102ec10d
4 changed files with 66 additions and 7 deletions
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25
Lib/test/test_subprocess.py
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@ -323,6 +323,31 @@ class ProcessTestCase(BaseTestCase):
rc = subprocess.call([sys.executable, "-c", cmd], stdout=1)
self.assertEqual(rc, 2)
def test_stdout_devnull(self):
p = subprocess.Popen([sys.executable, "-c",
'for i in range(10240):'
'print("x" * 1024)'],
stdout=subprocess.DEVNULL)
p.wait()
self.assertEqual(p.stdout, None)
def test_stderr_devnull(self):
p = subprocess.Popen([sys.executable, "-c",
'import sys\n'
'for i in range(10240):'
'sys.stderr.write("x" * 1024)'],
stderr=subprocess.DEVNULL)
p.wait()
self.assertEqual(p.stderr, None)
def test_stdin_devnull(self):
p = subprocess.Popen([sys.executable, "-c",
'import sys;'
'sys.stdin.read(1)'],
stdin=subprocess.DEVNULL)
p.wait()
self.assertEqual(p.stdin, None)
def test_cwd(self):
tmpdir = tempfile.gettempdir()
# We cannot use os.path.realpath to canonicalize the path,