'Test the lock of multiple editing.'

def test_lock(self):

    self.call(CmdCallback(), '/add    here    =    time    8:00', caller=self.char2)
    self.assertIsNotNone(self.char2.ndb._eveditor)
    line = self.call(CmdCallback(), '/edit    here    =    time    1')
    self.assertIsNone(self.char1.ndb._eveditor)
    line = self.call(CmdCallback(), '/del    here    =    time    1')
