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Patch #1675471: convert test_pty to unittest.

This commit is contained in:
Georg Brandl 2007-03-07 11:37:42 +00:00
parent 05c075d629
commit 9decc0dc8b
2 changed files with 119 additions and 112 deletions
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3
Lib/test/output/test_pty
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@ -1,3 +0,0 @@
test_pty
I wish to buy a fish license.
For my pet fish, Eric.

228
Lib/test/test_pty.py
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@ -1,5 +1,8 @@
import pty, os, sys, signal
from test.test_support import verbose, TestFailed, TestSkipped
import pty
import os
import signal
from test.test_support import verbose, TestSkipped, run_unittest
import unittest
TEST_STRING_1 = "I wish to buy a fish license.\n"
TEST_STRING_2 = "For my pet fish, Eric.\n"
@ -11,6 +14,7 @@ else:
def debug(msg):
pass
def normalize_output(data):
# Some operating systems do conversions on newline. We could possibly
# fix that by doing the appropriate termios.tcsetattr()s. I couldn't
@ -32,116 +36,122 @@ def normalize_output(data):
return data
# Marginal testing of pty suite. Cannot do extensive 'do or fail' testing
# because pty code is not too portable.
class PtyTest(unittest.TestCase):
def setUp(self):
# isatty() and close() can hang on some platforms. Set an alarm
# before running the test to make sure we don't hang forever.
self.old_alarm = signal.signal(signal.SIGALRM, self.handle_sig)
signal.alarm(10)
def tearDown(self):
# remove alarm, restore old alarm handler
signal.alarm(0)
signal.signal(signal.SIGALRM, self.old_alarm)
def handle_sig(self, sig, frame):
self.fail("isatty hung")
def test_basic(self):
try:
debug("Calling master_open()")
master_fd, slave_name = pty.master_open()
debug("Got master_fd '%d', slave_name '%s'" %
(master_fd, slave_name))
debug("Calling slave_open(%r)" % (slave_name,))
slave_fd = pty.slave_open(slave_name)
debug("Got slave_fd '%d'" % slave_fd)
except OSError:
# " An optional feature could not be imported " ... ?
raise TestSkipped, "Pseudo-terminals (seemingly) not functional."
def test_basic_pty():
try:
debug("Calling master_open()")
master_fd, slave_name = pty.master_open()
debug("Got master_fd '%d', slave_name '%s'"%(master_fd, slave_name))
debug("Calling slave_open(%r)"%(slave_name,))
slave_fd = pty.slave_open(slave_name)
debug("Got slave_fd '%d'"%slave_fd)
except OSError:
# " An optional feature could not be imported " ... ?
raise TestSkipped, "Pseudo-terminals (seemingly) not functional."
if not os.isatty(slave_fd):
raise TestFailed, "slave_fd is not a tty"
debug("Writing to slave_fd")
os.write(slave_fd, TEST_STRING_1)
s1 = os.read(master_fd, 1024)
sys.stdout.write(normalize_output(s1))
debug("Writing chunked output")
os.write(slave_fd, TEST_STRING_2[:5])
os.write(slave_fd, TEST_STRING_2[5:])
s2 = os.read(master_fd, 1024)
sys.stdout.write(normalize_output(s2))
os.close(slave_fd)
os.close(master_fd)
def handle_sig(sig, frame):
raise TestFailed, "isatty hung"
# isatty() and close() can hang on some platforms
# set an alarm before running the test to make sure we don't hang forever
old_alarm = signal.signal(signal.SIGALRM, handle_sig)
signal.alarm(10)
try:
test_basic_pty()
finally:
# remove alarm, restore old alarm handler
signal.alarm(0)
signal.signal(signal.SIGALRM, old_alarm)
# basic pty passed.
debug("calling pty.fork()")
pid, master_fd = pty.fork()
if pid == pty.CHILD:
# stdout should be connected to a tty.
if not os.isatty(1):
debug("Child's fd 1 is not a tty?!")
os._exit(3)
# After pty.fork(), the child should already be a session leader.
# (on those systems that have that concept.)
debug("In child, calling os.setsid()")
try:
os.setsid()
except OSError:
# Good, we already were session leader
debug("Good: OSError was raised.")
pass
except AttributeError:
# Have pty, but not setsid() ?
debug("No setsid() available ?")
pass
except:
# We don't want this error to propagate, escaping the call to
# os._exit() and causing very peculiar behavior in the calling
# regrtest.py !
# Note: could add traceback printing here.
debug("An unexpected error was raised.")
os._exit(1)
else:
debug("os.setsid() succeeded! (bad!)")
os._exit(2)
os._exit(4)
else:
debug("Waiting for child (%d) to finish."%pid)
##line = os.read(master_fd, 80)
##lines = line.replace('\r\n', '\n').split('\n')
##if False and lines != ['In child, calling os.setsid()',
## 'Good: OSError was raised.', '']:
## raise TestFailed("Unexpected output from child: %r" % line)
(pid, status) = os.waitpid(pid, 0)
res = status >> 8
debug("Child (%d) exited with status %d (%d)."%(pid, res, status))
if res == 1:
raise TestFailed, "Child raised an unexpected exception in os.setsid()"
elif res == 2:
raise TestFailed, "pty.fork() failed to make child a session leader."
elif res == 3:
raise TestFailed, "Child spawned by pty.fork() did not have a tty as stdout"
elif res != 4:
raise TestFailed, "pty.fork() failed for unknown reasons."
##debug("Reading from master_fd now that the child has exited")
##try:
## s1 = os.read(master_fd, 1024)
##except os.error:
## pass
##else:
## raise TestFailed("Read from master_fd did not raise exception")
self.assertTrue(os.isatty(slave_fd), 'slave_fd is not a tty')
debug("Writing to slave_fd")
os.write(slave_fd, TEST_STRING_1)
s1 = os.read(master_fd, 1024)
self.assertEquals('I wish to buy a fish license.\n',
normalize_output(s1))
debug("Writing chunked output")
os.write(slave_fd, TEST_STRING_2[:5])
os.write(slave_fd, TEST_STRING_2[5:])
s2 = os.read(master_fd, 1024)
self.assertEquals('For my pet fish, Eric.\n', normalize_output(s2))
os.close(slave_fd)
os.close(master_fd)
os.close(master_fd)
def test_fork(self):
debug("calling pty.fork()")
pid, master_fd = pty.fork()
if pid == pty.CHILD:
# stdout should be connected to a tty.
if not os.isatty(1):
debug("Child's fd 1 is not a tty?!")
os._exit(3)
# After pty.fork(), the child should already be a session leader.
# (on those systems that have that concept.)
debug("In child, calling os.setsid()")
try:
os.setsid()
except OSError:
# Good, we already were session leader
debug("Good: OSError was raised.")
pass
except AttributeError:
# Have pty, but not setsid()?
debug("No setsid() available?")
pass
except:
# We don't want this error to propagate, escaping the call to
# os._exit() and causing very peculiar behavior in the calling
# regrtest.py !
# Note: could add traceback printing here.
debug("An unexpected error was raised.")
os._exit(1)
else:
debug("os.setsid() succeeded! (bad!)")
os._exit(2)
os._exit(4)
else:
debug("Waiting for child (%d) to finish." % pid)
##line = os.read(master_fd, 80)
##lines = line.replace('\r\n', '\n').split('\n')
##if False and lines != ['In child, calling os.setsid()',
## 'Good: OSError was raised.', '']:
## raise TestFailed("Unexpected output from child: %r" % line)
(pid, status) = os.waitpid(pid, 0)
res = status >> 8
debug("Child (%d) exited with status %d (%d)." % (pid, res, status))
if res == 1:
self.fail("Child raised an unexpected exception in os.setsid()")
elif res == 2:
self.fail("pty.fork() failed to make child a session leader.")
elif res == 3:
self.fail("Child spawned by pty.fork() did not have a tty as stdout")
elif res != 4:
self.fail("pty.fork() failed for unknown reasons.")
##debug("Reading from master_fd now that the child has exited")
##try:
## s1 = os.read(master_fd, 1024)
##except os.error:
## pass
##else:
## raise TestFailed("Read from master_fd did not raise exception")
os.close(master_fd)
# pty.fork() passed.
# pty.fork() passed.
def test_main(verbose=None):
run_unittest(PtyTest)
if __name__ == "__main__":
test_main()