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# Testing select module
from test.test_support import verbose, reap_children
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'):
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()
reap_children()
test()
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