Viewing file:  test_select.py (1.61 KB) -rw-r--r--
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# Testing select module
from test.test_support import verbose
import select
import os
# test some known error conditions
try:
rfd, wfd, xfd = select.select(1, 2, 3)
except TypeError:
pass
else:
print 'expected TypeError exception not raised'
class Nope:
pass
class Almost:
def fileno(self):
return 'fileno'
try:
rfd, wfd, xfd = select.select([Nope()], [], [])
except TypeError:
pass
else:
print 'expected TypeError exception not raised'
try:
rfd, wfd, xfd = select.select([Almost()], [], [])
except TypeError:
pass
else:
print 'expected TypeError exception not raised'
try:
rfd, wfd, xfd = select.select([], [], [], 'not a number')
except TypeError:
pass
else:
print 'expected TypeError exception not raised'
def test():
import sys
if sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'):
if verbose:
print "Can't test select easily on", sys.platform
return
cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
p = os.popen(cmd, 'r')
for tout in (0, 1, 2, 4, 8, 16) + (None,)*10:
if verbose:
print 'timeout =', tout
rfd, wfd, xfd = select.select([p], [], [], tout)
if (rfd, wfd, xfd) == ([], [], []):
continue
if (rfd, wfd, xfd) == ([p], [], []):
line = p.readline()
if verbose:
print repr(line)
if not line:
if verbose:
print 'EOF'
break
continue
print 'Unexpected return values from select():', rfd, wfd, xfd
p.close()
test()
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