def test_close(self):
"""
You can close all the connections
"""
c1 = MagicMock()
c2 = MagicMock()
pool = ConnectionPool()
pool.add(c1)
pool.add(c2)
d = pool.close()
d.addCallback(lambda _: c1.close.assert_called_once_with())
d.addCallback(lambda _: c2.close.assert_called_once_with())
return d
