$ hg clone http://localhost:$HGPORT/ copy

  abort: error: Connection refused

  $ echo $?

  0

  $ test -d copy || echo copy: No such file or directory

  copy: No such file or directory

  $ cat > dumb.py <<EOF

  > import BaseHTTPServer, SimpleHTTPServer, os, signal

  > def run(server_class=BaseHTTPServer.HTTPServer,

  >         handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):

  >     server_address = ('localhost', int(os.environ['HGPORT']))

  >     httpd = server_class(server_address, handler_class)

  >     httpd.serve_forever()

  > signal.signal(signal.SIGTERM, lambda x: sys.exit(0))

  > run()

  > EOF

  $ python dumb.py 2>/dev/null &

  $ echo $! >> $DAEMON_PIDS

give the server some time to start running

  $ sleep 1

  $ hg clone http://localhost:$HGPORT/foo copy2 2>&1

  abort: HTTP Error 404: .*

  $ echo $?

  0

  $ kill $!