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copied!<p>You can easily start a server and then access it in a test case. The gevent's <a href="http://bitbucket.org/denis/gevent/src/tip/greentest/" rel="noreferrer">own test suite</a> does exactly that for testing gevent's <a href="http://gevent.org/servers.html" rel="noreferrer">built-in servers</a>.</p> <p>For example:</p> <pre><code>class SimpleServer(gevent.server.StreamServer): def handle(self, socket, address): socket.sendall('hello and goodbye!') class Test(unittest.TestCase): def test(self): server = SimpleServer(('127.0.0.1', 0)) server.start() client = gevent.socket.create_connection(('127.0.0.1', server.server_port)) response = client.makefile().read() assert response == 'hello and goodbye!' server.stop() </code></pre> <p>Using <code>0</code> for the port value means the server will use any available port. After the server is started, the actual value chosen by <code>bind</code> is available as <code>server_port</code> attribute.</p> <p><code>StreamServer</code> supports SSL too, pass <code>keyfile</code> and <code>certfile</code> arguments to the constructor and it will wrap each socket with <code>SSLObject</code> before passing it to your handler.</p> <p>If you don't use <code>StreamServer</code> and your server is based on <a href="http://gevent.org/intro.html#lightweight-pseudothreads" rel="noreferrer">Greenlet</a> then indeed <a href="http://gevent.org/gevent.html#gevent.spawn" rel="noreferrer">spawning</a> it is what you should do. Don't forget to <a href="http://gevent.org/gevent.html#gevent.Greenlet.kill" rel="noreferrer">kill</a> it at the end of the test case.</p> <p>Starting a server and spawning a greenlet are fast operations in <a href="http://gevent.org/" rel="noreferrer">gevent</a>, much faster than creating a new thread or process and you can easily create a new server for each test case. Just don't forget to cleanup as soon as you don't need the server anymore.</p> <p>I believe there's no need to mock any of gevent API, it's much easier just to use it as servers and clients can happily live within the same process.</p>

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