'L{MemCacheProtocol.append} behaves like a L{MemCacheProtocol.set}
method: it returns a L{Deferred} which is called back with C{True} when
the operation succeeds.'

def test_append(self):

    return self._test(self.proto.append('foo', 'bar'), 'append    foo    0    0    3\r\nbar\r\n', 'STORED\r\n', True)
