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gentest.py
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gentest.py
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#!/usr/bin/env python
"""\
Handle testing and experiments for colorg.
"""
import json
import socket
import subprocess
import sys
import time
# How many seconds before trying again to contact a server.
retry_delta = .01
# How many seconds before giving up trying to contact a server.
retry_maximum = 1
class Main:
verbose = False
def main(self, *arguments):
import getopt
options, arguments = getopt.getopt(arguments, 'v')
for option, value in options:
if option == '-v':
self.verbose = True
Test()
class Server:
server = None
def __init__(self, host=None, port=None):
self.host = host
self.port = port
def round_trip(self, structure):
self.writer.write(json.dumps(structure) + '\n')
return json.loads(self.reader.readline())
def start(self):
# Launch a server.
arguments = ['colorg-server', '-q']
if self.host is not None:
arguments.append(self.host)
if self.port is not None:
arguments.append(str(self.port))
self.server = subprocess.Popen(arguments)
# The server needs time to start, kibitz for a connection.
handle = socket.socket()
retry = 0
while retry < retry_maximum:
try:
handle.connect((self.host or 'localhost', self.port or 7997))
except socket.error:
time.sleep(retry_delta)
retry += retry_delta
else:
if run.verbose:
sys.stderr.write("Server replied after %d ms.\n"
% round(1000 * retry))
break
else:
sys.exit("Server did not reply in %d ms.\n"
% round(1000 * retry))
# Establish means to read and write to the server.
self.reader = handle.makefile()
self.writer = handle.makefile('w', 0)
# Read server initial reply.
greating = self.reader.readline()
assert greating == '"colorg v1"\n'
def stop(self):
# Kill the server.
self.server.terminate()
del self.server
# The server needs time to die, wait until this happens.
handle = socket.socket()
retry = 0
while retry < retry_maximum:
try:
handle.connect((self.host or 'localhost', self.port or 7997))
except socket.error:
if run.verbose:
sys.stderr.write("Server died after %d ms.\n"
% round(1000 * retry))
break
else:
time.sleep(retry_delta)
retry += retry_delta
else:
sys.exit("Server still alive after %d ms.\n"
% round(1000 * retry))
class Test:
def __init__(self):
server = Server()
server.start()
print '***', server.round_trip('poll')
server.stop()
run = Main()
main = run.main
if __name__ == '__main__':
main(*sys.argv[1:])