func (s *clientSuite) checkInstance(c *gc.C, id, instanceId, nonce string,
hc instance.HardwareCharacteristics, addr []network.Address) {
machine, err := s.BackingState.Machine(id)
c.Assert(err, jc.ErrorIsNil)
machineInstanceId, err := machine.InstanceId()
c.Assert(err, jc.ErrorIsNil)
c.Assert(machine.CheckProvisioned(nonce), jc.IsTrue)
c.Assert(machineInstanceId, gc.Equals, instance.Id(instanceId))
machineHardware, err := machine.HardwareCharacteristics()
c.Assert(err, jc.ErrorIsNil)
c.Assert(machineHardware.String(), gc.Equals, hc.String())
c.Assert(machine.Addresses(), gc.DeepEquals, addr)
}
