def test_set_without_value_key_sends_none():
requester = Mock()
requester.put.side_effect = get_response
client = Client(requester=requester)
key = '/update_key'
client.set(key)
requester.put.assert_called_with(key, data={'value': None, 'dir': False})
def test_update_key_returns_a_node_with_prev_node():
requester = Mock()
requester.put.side_effect = get_response
client = Client(requester=requester)
node = client.set('/update_key', value=1)
assert 'key_val' == node.value
assert 'old_key_val' == node.prev_node.value
