def test_channel_endmarker_callback(self):

       l = []

       channel = self.gw.remote_exec(source='''

               channel.send(42)

               channel.send(13)

               channel.send(channel.gateway.newchannel())

               ''') 

       channel.setcallback(l.append, 999)

       py.test.raises(IOError, channel.receive)

->     channel.waitclose(TESTTIMEOUT)

       assert len(l) == 4

       assert l[:2] == [42,13]

       assert isinstance(l[2], channel.__class__) 

       assert l[3] == 999