blob: 186ea244f05f9788a3a8321e66edf99d40534ad8 [file] [log] [blame]
"""Tests for the logos program."""
import os
import select
import signal
import socket
import subprocess
from wvtest.wvtest import WVFAIL
from wvtest.wvtest import WVPASS
from wvtest.wvtest import WVPASSEQ
from wvtest.wvtest import WVPASSLT
from wvtest.wvtest import wvtest
from wvtest.wvtest import wvtest_main
def TestLogos():
"""spin up and test a logos server."""
# We use a SOCK_DGRAM here rather than a normal pipe, because datagram
# sockets are guaranteed never to merge consecutive writes into a single
# packet. That way we can validate the correct merging of write() calls
# into exactly one per line.
sock1, sock2 = socket.socketpair(socket.AF_UNIX, socket.SOCK_DGRAM)
pipefd1, pipefd2 = os.pipe()
pipe1 = os.fdopen(pipefd1, 'r') # for auto-close semantics
pipe2 = os.fdopen(pipefd2, 'w') # for auto-close semantics
os.environ['LOGOS_DEBUG'] = '1'
argv = ['./host-logos', 'fac', '50000']
p = subprocess.Popen(argv, stdin=subprocess.PIPE, stdout=sock1.fileno())
fd1 = p.stdin.fileno()
fd2 = sock2.fileno()
def _Read():
r, unused_w, unused_x =[fd2, pipe1], [], [], 30)
if pipe1 in r:
WVFAIL('subprocess died unexpectedly')
raise Exception('subprocess died unexpectedly with code %d' % p.wait())
elif not r:
raise Exception('read timed out')
return, 4096)
# basics
os.write(fd1, 'a\nErROR: b\nw: c')
WVPASSEQ('<7>fac: a\n', _Read())
WVPASSEQ('<3>fac: ErROR: b\n', _Read())
r, unused_w, unused_x =[fd2], [], [], 0)
os.write(fd1, '\n\n')
WVPASSEQ('<4>fac: w: c\n', _Read())
WVPASSEQ('<7>fac: \n', _Read())
# tabs and CR
os.write(fd1, 'a\tb\r\nabba\tbbb\naa\t\tb\tc\n')
WVPASSEQ('<7>fac: a b\n', _Read())
WVPASSEQ('<7>fac: abba bbb\n', _Read())
WVPASSEQ('<7>fac: aa b c\n', _Read())
os.write(fd1, ''.join(chr(i) for i in range(33)) + '\n')
WVPASSEQ(r'<7>fac: '
r'\x00\x01\x02\x03\x04\x05\x06\x07\x08 '
'\n', _Read())
WVPASSEQ(r'<7>fac: '
r'\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f '
'\n', _Read())
# very long lines should be broken, but not missing any characters
sent = ('x ' * 2000)
for c in sent:
os.write(fd1, c)
os.write(fd1, '\nbooga!')
total = ''
while total != sent:
print 'len(total)=%d len(sent)=%d' % (len(total), len(sent))
result = _Read()
WVPASSLT(len(result), len(sent))
WVPASS(result.startswith('<7>fac: '))
total += result[8:-1]
if not WVPASS(sent.startswith(total)):
result = _Read()
print '%r' % result
WVPASS(result.startswith('<4>fac: W: '))
r, unused_w, unused_x =[fd2], [], [], 0)
os.write(fd1, '\n')
WVPASSEQ('<7>fac: booga!\n', _Read())
# rate limiting
os.write(fd1, (('x'*80) + '\n') * 500)
result = ''
while 'burst limit' not in result:
result = _Read()
print repr(result)
print 'got: %r' % result
WVPASS('rate limiting started')
while 1: # drain the input until it's idle
r, unused_w, unused_x =[fd1], [], [], 0.1)
if not r:
p.send_signal(signal.SIGHUP) # refill the bucket, ending rate limiting
os.write(fd1, 'Awake!\n')
result = ''
while 'burst limit' not in result:
result = _Read()
print 'got: %r' % result
WVPASS('rate limiting finished')
result = ''
while 'Awake!' not in result:
result = _Read()
WVPASSEQ(p.wait(), 0)
if __name__ == '__main__':