def test_foreground_background_output(
test_fn, capfd, termios_on_or_off, tmpdir):
"""Tests hitting 'v' toggles output, and that force_echo works."""
if (sys.version_info >= (3, 8) and sys.platform == 'darwin'
and termios_on_or_off == no_termios):
return
shell = PseudoShell(test_fn, synchronized_logger)
log_path = str(tmpdir.join("log.txt"))
# Locks for synchronizing with minion
write_lock = multiprocessing.Lock() # must be held by minion to write
v_lock = multiprocessing.Lock() # held while controller is in v mode
with termios_on_or_off():
shell.start(
write_lock=write_lock,
v_lock=v_lock,
debug=True,
log_path=log_path
)
exitcode = shell.join()
out, err = capfd.readouterr()
print(err) # will be shown if something goes wrong
print(out)
# processes completed successfully
assert exitcode == 0
# split output into lines
output = out.strip().split("\n")
# also get lines of log file
assert os.path.exists(log_path)
with open(log_path) as log:
log = log.read().strip().split("\n")
# Controller and minion process coordinate with locks such that the minion
# writes "off" when echo is off, and "on" when echo is on. The
# output should contain mostly "on" lines, but may contain an "off"
# or two. This is because the controller toggles echo by sending "v" on
# stdin to the minion, but this is not synchronized with our locks.
# It's good enough for a test, though. We allow at most 4 "off"'s in
# the output to account for the race.
#
# Originally we only allowed 2, but GitHub's macOS runners seem to be
# very slow, and frequently we get 3 "off"'s. Increased limit to 4 to
# account for this. Real errors should still be caught with this limit.
assert (
['forced output', 'on'] == uniq(output) or
output.count("off") <= 4 # if controller_fd is a bit slow
)
# log should be off for a while, then on, then off
assert (
['forced output', 'off', 'on', 'off'] == uniq(log) and
log.count("off") > 2 # ensure some "off" lines were omitted
)
def test_foreground_background_output(
test_fn, capfd, termios_on_or_off, tmpdir):
"""Tests hitting 'v' toggles output, and that force_echo works."""
if (sys.version_info >= (3, 8) and sys.platform == 'darwin'
and termios_on_or_off == no_termios):
return
shell = PseudoShell(test_fn, synchronized_logger)
log_path = str(tmpdir.join("log.txt"))
# Locks for synchronizing with minion
write_lock = multiprocessing.Lock() # must be held by minion to write
v_lock = multiprocessing.Lock() # held while controller is in v mode
with termios_on_or_off():
shell.start(
write_lock=write_lock,
v_lock=v_lock,
debug=True,
log_path=log_path
)
exitcode = shell.join()
out, err = capfd.readouterr()
print(err) # will be shown if something goes wrong
print(out)
# processes completed successfully
assert exitcode == 0
# split output into lines
output = out.strip().split("\n")
# also get lines of log file
assert os.path.exists(log_path)
with open(log_path) as log:
log = log.read().strip().split("\n")
# Controller and minion process coordinate with locks such that the
# minion writes "off" when echo is off, and "on" when echo is on. The
# output should contain mostly "on" lines, but may contain "off"
# lines if the controller is slow. The important thing to observe
# here is that we started seeing 'on' in the end.
assert (
['forced output', 'on'] == uniq(output) or
['forced output', 'off', 'on'] == uniq(output)
)
# log should be off for a while, then on, then off
assert (
['forced output', 'off', 'on', 'off'] == uniq(log) and
log.count("off") > 2 # ensure some "off" lines were omitted
)
def test_foreground_background_output(test_fn, capfd, termios_on_or_off,
tmpdir):
"""Tests hitting 'v' toggles output, and that force_echo works."""
shell = PseudoShell(test_fn, synchronized_logger)
log_path = str(tmpdir.join("log.txt"))
# Locks for synchronizing with child
write_lock = multiprocessing.Lock() # must be held by child to write
v_lock = multiprocessing.Lock() # held while master is in v mode
with termios_on_or_off():
shell.start(write_lock=write_lock,
v_lock=v_lock,
debug=True,
log_path=log_path)
exitcode = shell.join()
out, err = capfd.readouterr()
print(err) # will be shown if something goes wrong
print(out)
# processes completed successfully
assert exitcode == 0
# split output into lines
output = out.strip().split("\n")
# also get lines of log file
assert os.path.exists(log_path)
with open(log_path) as log:
log = log.read().strip().split("\n")
# Master and child process coordinate with locks such that the child
# writes "off" when echo is off, and "on" when echo is on. The
# output should contain mostly "on" lines, but may contain an "off"
# or two. This is because the master toggles echo by sending "v" on
# stdin to the child, but this is not synchronized with our locks.
# It's good enough for a test, though. We allow at most 2 "off"'s in
# the output to account for the race.
assert (['forced output', 'on'] == uniq(output)
or output.count("off") <= 2 # if master_fd is a bit slow
)
# log should be off for a while, then on, then off
assert (['forced output', 'off', 'on', 'off'] == uniq(log)
and log.count("off") > 2 # ensure some "off" lines were omitted
)
