'A new key exchange cannot be started while a key exchange is already in
progress.  If an attempt is made to send a I{KEXINIT} message using
L{SSHTransportBase.sendKexInit} while a key exchange is in progress
causes that method to raise a L{RuntimeError}.'

def test_sendKexInitTwiceFails(self):

    self.assertRaises(RuntimeError, self.proto.sendKexInit)
