cpython/Lib/dos-8x3/test_sel.py

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# Testing select module
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from test_support import verbose
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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'
def test():
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import sys
if sys.platform in ('win', 'mac'):
if verbose:
print "Can't test select easily"
return
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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:
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if verbose:
print 'timeout =', tout
rfd, wfd, xfd = select.select([p], [], [], tout)
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## print rfd, wfd, xfd
if (rfd, wfd, xfd) == ([], [], []):
continue
if (rfd, wfd, xfd) == ([p], [], []):
line = p.readline()
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if verbose:
print `line`
if not line:
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if verbose:
print 'EOF'
break
continue
print 'Heh?'
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p.close()
test()
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