// RunCommand runs the command and returns channels holding the
// command's operations and errors.
func RunCommand(ctx *cmd.Context, com cmd.Command, args ...string) (opc chan dummy.Operation, errc chan error) {
	if ctx == nil {
		panic("ctx == nil")
	}
	errc = make(chan error, 1)
	opc = make(chan dummy.Operation, 200)
	dummy.Listen(opc)
	go func() {
		defer func() {
			// signal that we're done with this ops channel.
			dummy.Listen(nil)
			// now that dummy is no longer going to send ops on
			// this channel, close it to signal to test cases
			// that we are done.
			close(opc)
		}()

		if err := coretesting.InitCommand(com, args); err != nil {
			errc <- err
			return
		}

		errc <- com.Run(ctx)
	}()
	return
}

func (s *suite) TestAllocateAddress(c *gc.C) {
	e := s.bootstrapTestEnviron(c, false)
	defer func() {
		err := e.Destroy()
		c.Assert(err, gc.IsNil)
	}()

	inst, _ := jujutesting.AssertStartInstance(c, e, "0")
	c.Assert(inst, gc.NotNil)
	netId := network.Id("net1")

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectAddress := network.NewAddress("0.1.2.1", network.ScopeCloudLocal)
	address, err := e.AllocateAddress(inst.Id(), netId)
	c.Assert(err, gc.IsNil)
	c.Assert(address, gc.DeepEquals, expectAddress)

	assertAllocateAddress(c, e, opc, inst.Id(), netId, expectAddress)

	expectAddress = network.NewAddress("0.1.2.2", network.ScopeCloudLocal)
	address, err = e.AllocateAddress(inst.Id(), netId)
	c.Assert(err, gc.IsNil)
	c.Assert(address, gc.DeepEquals, expectAddress)
	assertAllocateAddress(c, e, opc, inst.Id(), netId, expectAddress)
}

func (s *cmdControllerSuite) TestSystemKillCallsEnvironDestroyOnHostedEnviron(c *gc.C) {
	st := s.Factory.MakeEnvironment(c, &factory.EnvParams{
		Name: "foo",
	})
	defer st.Close()

	st.SwitchBlockOn(state.DestroyBlock, "TestBlockDestroyEnvironment")
	st.Close()

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	conn, err := juju.NewAPIState(s.AdminUserTag(c), s.Environ, api.DialOpts{})
	c.Assert(err, jc.ErrorIsNil)
	s.AddCleanup(func(*gc.C) { conn.Close() })
	client := undertakerapi.NewClient(conn)

	startTime := time.Date(2015, time.September, 1, 17, 2, 1, 0, time.UTC)
	mClock := testing.NewClock(startTime)
	undertaker.NewUndertaker(client, mClock)

	store, err := configstore.Default()
	_, err = store.ReadInfo("dummyenv")
	c.Assert(err, jc.ErrorIsNil)

	s.run(c, "kill-controller", "dummyenv", "-y")

	// Ensure that Destroy was called on the hosted environment ...
	opRecvTimeout(c, st, opc, dummy.OpDestroy{})

	// ... and that the configstore was removed.
	_, err = store.ReadInfo("dummyenv")
	c.Assert(err, jc.Satisfies, errors.IsNotFound)
}

func (s *MachineSuite) TestManageModel(c *gc.C) {
	usefulVersion := version.Binary{
		Number: jujuversion.Current,
		Arch:   arch.HostArch(),
		Series: "quantal", // to match the charm created below
	}
	envtesting.AssertUploadFakeToolsVersions(c, s.DefaultToolsStorage, s.Environ.Config().AgentStream(), s.Environ.Config().AgentStream(), usefulVersion)
	m, _, _ := s.primeAgent(c, state.JobManageModel)
	op := make(chan dummy.Operation, 200)
	dummy.Listen(op)

	a := s.newAgent(c, m)
	// Make sure the agent is stopped even if the test fails.
	defer a.Stop()
	done := make(chan error)
	go func() {
		done <- a.Run(nil)
	}()
	c.Logf("started test agent, waiting for workers...")
	r0 := s.singularRecord.nextRunner(c)
	r0.waitForWorker(c, "txnpruner")

	// Check that the provisioner and firewaller are alive by doing
	// a rudimentary check that it responds to state changes.

	// Create an exposed service, and add a unit.
	charm := s.AddTestingCharm(c, "dummy")
	svc := s.AddTestingService(c, "test-service", charm)
	err := svc.SetExposed()
	c.Assert(err, jc.ErrorIsNil)
	units, err := juju.AddUnits(s.State, svc, svc.Name(), 1, nil)
	c.Assert(err, jc.ErrorIsNil)

	// It should be allocated to a machine, which should then be provisioned.
	c.Logf("service %q added with 1 unit, waiting for unit %q's machine to be started...", svc.Name(), units[0].Name())
	c.Check(opRecvTimeout(c, s.State, op, dummy.OpStartInstance{}), gc.NotNil)
	c.Logf("machine hosting unit %q started, waiting for the unit to be deployed...", units[0].Name())
	s.waitProvisioned(c, units[0])

	// Open a port on the unit; it should be handled by the firewaller.
	c.Logf("unit %q deployed, opening port tcp/999...", units[0].Name())
	err = units[0].OpenPort("tcp", 999)
	c.Assert(err, jc.ErrorIsNil)
	c.Check(opRecvTimeout(c, s.State, op, dummy.OpOpenPorts{}), gc.NotNil)
	c.Logf("unit %q port tcp/999 opened, cleaning up...", units[0].Name())

	err = a.Stop()
	c.Assert(err, jc.ErrorIsNil)
	select {
	case err := <-done:
		c.Assert(err, jc.ErrorIsNil)
	case <-time.After(coretesting.LongWait):
		c.Fatalf("timed out waiting for agent to terminate")
	}
	c.Logf("test agent stopped successfully.")
}

func (s *MachineSuite) TestManageEnviron(c *gc.C) {
	usefulVersion := version.Current
	usefulVersion.Series = "quantal" // to match the charm created below
	envtesting.AssertUploadFakeToolsVersions(c, s.Environ.Storage(), usefulVersion)
	m, _, _ := s.primeAgent(c, version.Current, state.JobManageEnviron)
	op := make(chan dummy.Operation, 200)
	dummy.Listen(op)

	a := s.newAgent(c, m)
	// Make sure the agent is stopped even if the test fails.
	defer a.Stop()
	done := make(chan error)
	go func() {
		done <- a.Run(nil)
	}()

	// Check that the provisioner and firewaller are alive by doing
	// a rudimentary check that it responds to state changes.

	// Add one unit to a service; it should get allocated a machine
	// and then its ports should be opened.
	charm := s.AddTestingCharm(c, "dummy")
	svc := s.AddTestingService(c, "test-service", charm)
	err := svc.SetExposed()
	c.Assert(err, gc.IsNil)
	units, err := juju.AddUnits(s.State, svc, 1, "")
	c.Assert(err, gc.IsNil)
	c.Check(opRecvTimeout(c, s.State, op, dummy.OpStartInstance{}), gc.NotNil)

	// Wait for the instance id to show up in the state.
	s.waitProvisioned(c, units[0])
	err = units[0].OpenPort("tcp", 999)
	c.Assert(err, gc.IsNil)

	c.Check(opRecvTimeout(c, s.State, op, dummy.OpOpenPorts{}), gc.NotNil)

	err = a.Stop()
	c.Assert(err, gc.IsNil)

	select {
	case err := <-done:
		c.Assert(err, gc.IsNil)
	case <-time.After(5 * time.Second):
		c.Fatalf("timed out waiting for agent to terminate")
	}

	c.Assert(s.singularRecord.started(), jc.DeepEquals, []string{
		"charm-revision-updater",
		"cleaner",
		"environ-provisioner",
		"firewaller",
		"minunitsworker",
		"resumer",
	})
}

func (s *CommonProvisionerSuite) SetUpTest(c *gc.C) {
	// Disable the default state policy, because the
	// provisioner needs to be able to test pathological
	// scenarios where a machine exists in state with
	// invalid environment config.
	dummy.SetStatePolicy(nil)

	s.JujuConnSuite.SetUpTest(c)

	// Create the operations channel with more than enough space
	// for those tests that don't listen on it.
	op := make(chan dummy.Operation, 500)
	dummy.Listen(op)
	s.op = op

	cfg, err := s.State.EnvironConfig()
	c.Assert(err, jc.ErrorIsNil)
	s.cfg = cfg

	// Create a machine for the dummy bootstrap instance,
	// so the provisioner doesn't destroy it.
	insts, err := s.Environ.Instances([]instance.Id{dummy.BootstrapInstanceId})
	c.Assert(err, jc.ErrorIsNil)
	addrs, err := insts[0].Addresses()
	c.Assert(err, jc.ErrorIsNil)
	machine, err := s.State.AddOneMachine(state.MachineTemplate{
		Addresses:  addrs,
		Series:     "quantal",
		Nonce:      agent.BootstrapNonce,
		InstanceId: dummy.BootstrapInstanceId,
		Jobs:       []state.MachineJob{state.JobManageEnviron},
	})
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(machine.Id(), gc.Equals, "0")

	current := version.Binary{
		Number: version.Current,
		Arch:   arch.HostArch(),
		Series: series.HostSeries(),
	}
	err = machine.SetAgentVersion(current)
	c.Assert(err, jc.ErrorIsNil)

	password, err := utils.RandomPassword()
	c.Assert(err, jc.ErrorIsNil)
	err = machine.SetPassword(password)
	c.Assert(err, jc.ErrorIsNil)

	s.st = s.OpenAPIAsMachine(c, machine.Tag(), password, agent.BootstrapNonce)
	c.Assert(s.st, gc.NotNil)
	c.Logf("API: login as %q successful", machine.Tag())
	s.provisioner = s.st.Provisioner()
	c.Assert(s.provisioner, gc.NotNil)
}

func runCommand(ctx *cmd.Context, com cmd.Command, args ...string) (opc chan dummy.Operation, errc chan error) {
	if ctx == nil {
		panic("ctx == nil")
	}
	errc = make(chan error, 1)
	opc = make(chan dummy.Operation, 200)
	dummy.Listen(opc)
	go func() {
		// signal that we're done with this ops channel.
		defer dummy.Listen(nil)

		err := coretesting.InitCommand(com, args)
		if err != nil {
			errc <- err
			return
		}

		err = com.Run(ctx)
		errc <- err
	}()
	return
}

func (s *workerSuite) SetUpTest(c *gc.C) {
	s.JujuConnSuite.SetUpTest(c)

	// Unbreak dummy provider methods.
	s.AssertConfigParameterUpdated(c, "broken", "")

	s.APIConnection, _ = s.OpenAPIAsNewMachine(c, state.JobManageModel)
	s.API = s.APIConnection.DiscoverSpaces()

	s.OpsChan = make(chan dummy.Operation, 10)
	dummy.Listen(s.OpsChan)
	s.spacesDiscovered = nil
}

func (s *suite) TestListNetworks(c *gc.C) {
	e := s.bootstrapTestEnviron(c)

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectInfo := []network.BasicInfo{
		{CIDR: "0.10.0.0/8", ProviderId: "dummy-private"},
		{CIDR: "0.20.0.0/24", ProviderId: "dummy-public"},
	}
	netInfo, err := e.ListNetworks()
	c.Assert(err, gc.IsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo)
	assertListNetworks(c, e, opc, expectInfo)
}

func (s *destroyEnvironmentSuite) TestDestroyEnvironmentWithContainers(c *gc.C) {
	ops := make(chan dummy.Operation, 500)
	dummy.Listen(ops)

	_, nonManager, _ := s.setUpInstances(c)
	nonManagerId, _ := nonManager.InstanceId()

	err := s.APIState.Client().DestroyEnvironment()
	c.Assert(err, gc.IsNil)
	for op := range ops {
		if op, ok := op.(dummy.OpStopInstances); ok {
			c.Assert(op.Ids, jc.SameContents, []instance.Id{nonManagerId})
			break
		}
	}
}

func (s *suite) TestSubnets(c *gc.C) {
	e := s.bootstrapTestEnviron(c)
	defer func() {
		err := e.Destroy()
		c.Assert(err, jc.ErrorIsNil)
	}()

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectInfo := []network.SubnetInfo{{
		CIDR:              "0.10.0.0/24",
		ProviderId:        "dummy-private",
		AvailabilityZones: []string{"zone1", "zone2"},
	}, {
		CIDR:       "0.20.0.0/24",
		ProviderId: "dummy-public",
	}}

	ids := []network.Id{"dummy-private", "dummy-public", "foo-bar"}
	netInfo, err := e.Subnets("i-foo", ids)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo)
	assertSubnets(c, e, opc, "i-foo", ids, expectInfo)

	// Test filtering by id(s).
	netInfo, err = e.Subnets("i-foo", nil)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo)
	assertSubnets(c, e, opc, "i-foo", nil, expectInfo)
	netInfo, err = e.Subnets("i-foo", ids[0:1])
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo[0:1])
	assertSubnets(c, e, opc, "i-foo", ids[0:1], expectInfo[0:1])
	netInfo, err = e.Subnets("i-foo", ids[1:])
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo[1:])
	assertSubnets(c, e, opc, "i-foo", ids[1:], expectInfo[1:])

	// Test we can induce errors.
	s.breakMethods(c, e, "Subnets")
	netInfo, err = e.Subnets("i-any", nil)
	c.Assert(err, gc.ErrorMatches, `dummy\.Subnets is broken`)
	c.Assert(netInfo, gc.HasLen, 0)
}

func (s *destroyEnvironmentSuite) TestDestroyEnvironmentWithContainers(c *gc.C) {
	ops := make(chan dummy.Operation, 500)
	dummy.Listen(ops)

	_, nonManager, _ := s.setUpInstances(c)
	nonManagerId, _ := nonManager.InstanceId()

	err := common.DestroyEnvironment(s.State, s.State.EnvironTag())
	c.Assert(err, jc.ErrorIsNil)
	for op := range ops {
		if op, ok := op.(dummy.OpStopInstances); ok {
			c.Assert(op.Ids, jc.SameContents, []instance.Id{nonManagerId})
			break
		}
	}

	s.metricSender.CheckCalls(c, []jtesting.StubCall{{FuncName: "SendMetrics"}})
}

func (s *CommonProvisionerSuite) SetUpTest(c *gc.C) {
	// Disable the default state policy, because the
	// provisioner needs to be able to test pathological
	// scenarios where a machine exists in state with
	// invalid environment config.
	dummy.SetStatePolicy(nil)

	s.JujuConnSuite.SetUpTest(c)
	// Create the operations channel with more than enough space
	// for those tests that don't listen on it.
	op := make(chan dummy.Operation, 500)
	dummy.Listen(op)
	s.op = op

	cfg, err := s.State.EnvironConfig()
	c.Assert(err, gc.IsNil)
	s.cfg = cfg
}

func (s *suite) TestReleaseAddress(c *gc.C) {
	e := s.bootstrapTestEnviron(c, false)
	defer func() {
		err := e.Destroy()
		c.Assert(err, jc.ErrorIsNil)
	}()

	inst, _ := jujutesting.AssertStartInstance(c, e, "0")
	c.Assert(inst, gc.NotNil)
	subnetId := network.Id("net1")

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	// Release a couple of addresses.
	address := network.NewScopedAddress("0.1.2.1", network.ScopeCloudLocal)
	macAddress := "foobar"
	hostname := "myhostname"
	err := e.ReleaseAddress(inst.Id(), subnetId, address, macAddress, hostname)
	c.Assert(err, jc.ErrorIsNil)
	assertReleaseAddress(c, e, opc, inst.Id(), subnetId, address, macAddress, hostname)

	address = network.NewScopedAddress("0.1.2.2", network.ScopeCloudLocal)
	err = e.ReleaseAddress(inst.Id(), subnetId, address, macAddress, hostname)
	c.Assert(err, jc.ErrorIsNil)
	assertReleaseAddress(c, e, opc, inst.Id(), subnetId, address, macAddress, hostname)

	// Test we can induce errors.
	s.breakMethods(c, e, "ReleaseAddress")
	address = network.NewScopedAddress("0.1.2.3", network.ScopeCloudLocal)
	err = e.ReleaseAddress(inst.Id(), subnetId, address, macAddress, hostname)
	c.Assert(err, gc.ErrorMatches, `dummy\.ReleaseAddress is broken`)

	// Finally, test the method respects the feature flag when
	// disabled.
	s.SetFeatureFlags() // clear the flags.
	err = e.ReleaseAddress(inst.Id(), subnetId, address, macAddress, hostname)
	c.Assert(err, gc.ErrorMatches, "address allocation not supported")
	c.Assert(err, jc.Satisfies, errors.IsNotSupported)
}

func (s *workerSuite) SetUpTest(c *gc.C) {
	s.JujuConnSuite.SetUpTest(c)
	if s.Enabled {
		s.SetFeatureFlags(feature.AddressAllocation)
	}

	// Unbreak dummy provider methods.
	s.AssertConfigParameterUpdated(c, "broken", "")

	s.APIConnection, _ = s.OpenAPIAsNewMachine(c, state.JobManageModel)
	s.API = s.APIConnection.Addresser()

	machineA, err := s.State.AddMachine("quantal", state.JobHostUnits)
	s.MachineA = machineA
	c.Assert(err, jc.ErrorIsNil)
	err = s.MachineA.SetProvisioned("foo", "fake_nonce", nil)
	c.Assert(err, jc.ErrorIsNil)

	// This machine will be destroyed after address creation to test the
	// handling of addresses for machines that have gone.
	machineB, err := s.State.AddMachine("quantal", state.JobHostUnits)
	s.MachineB = machineB
	c.Assert(err, jc.ErrorIsNil)

	s.createAddresses(c)
	s.State.StartSync()

	s.OpsChan = make(chan dummy.Operation, 10)
	dummy.Listen(s.OpsChan)

	// Start the Addresser worker.
	w, err := addresser.NewWorker(s.API)
	c.Assert(err, jc.ErrorIsNil)
	s.Worker = w

	s.waitForInitialDead(c)
}

func dummyListen() chan dummy.Operation {
	opsChan := make(chan dummy.Operation, 10)
	dummy.Listen(opsChan)
	return opsChan
}

func (s *suite) TestNetworkInterfaces(c *gc.C) {
	e := s.bootstrapTestEnviron(c)
	defer func() {
		err := e.Destroy()
		c.Assert(err, jc.ErrorIsNil)
	}()

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectInfo := []network.InterfaceInfo{{
		ProviderId:       "dummy-eth0",
		ProviderSubnetId: "dummy-private",
		CIDR:             "0.10.0.0/24",
		DeviceIndex:      0,
		InterfaceName:    "eth0",
		InterfaceType:    "ethernet",
		VLANTag:          0,
		MACAddress:       "aa:bb:cc:dd:ee:f0",
		Disabled:         false,
		NoAutoStart:      false,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.10.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.10.0.1"),
	}, {
		ProviderId:       "dummy-eth1",
		ProviderSubnetId: "dummy-public",
		CIDR:             "0.20.0.0/24",
		DeviceIndex:      1,
		InterfaceName:    "eth1",
		InterfaceType:    "ethernet",
		VLANTag:          1,
		MACAddress:       "aa:bb:cc:dd:ee:f1",
		Disabled:         false,
		NoAutoStart:      true,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.20.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.20.0.1"),
	}, {
		ProviderId:       "dummy-eth2",
		ProviderSubnetId: "dummy-disabled",
		CIDR:             "0.30.0.0/24",
		DeviceIndex:      2,
		InterfaceName:    "eth2",
		InterfaceType:    "ethernet",
		VLANTag:          2,
		MACAddress:       "aa:bb:cc:dd:ee:f2",
		Disabled:         true,
		NoAutoStart:      false,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.30.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.30.0.1"),
	}}
	info, err := e.NetworkInterfaces("i-42")
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(info, jc.DeepEquals, expectInfo)
	assertInterfaces(c, e, opc, "i-42", expectInfo)

	// Test we can induce errors.
	s.breakMethods(c, e, "NetworkInterfaces")
	info, err = e.NetworkInterfaces("i-any")
	c.Assert(err, gc.ErrorMatches, `dummy\.NetworkInterfaces is broken`)
	c.Assert(info, gc.HasLen, 0)
}

func (s *suite) TestNetworkInterfaces(c *gc.C) {
	e := s.bootstrapTestEnviron(c, false)
	defer func() {
		err := e.Destroy()
		c.Assert(err, jc.ErrorIsNil)
	}()

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectInfo := []network.InterfaceInfo{{
		ProviderId:       "dummy-eth0",
		ProviderSubnetId: "dummy-private",
		NetworkName:      "juju-private",
		CIDR:             "0.10.0.0/24",
		DeviceIndex:      0,
		InterfaceName:    "eth0",
		VLANTag:          0,
		MACAddress:       "aa:bb:cc:dd:ee:f0",
		Disabled:         false,
		NoAutoStart:      false,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.10.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.10.0.1"),
		ExtraConfig:      nil,
	}, {
		ProviderId:       "dummy-eth1",
		ProviderSubnetId: "dummy-public",
		NetworkName:      "juju-public",
		CIDR:             "0.20.0.0/24",
		DeviceIndex:      1,
		InterfaceName:    "eth1",
		VLANTag:          1,
		MACAddress:       "aa:bb:cc:dd:ee:f1",
		Disabled:         false,
		NoAutoStart:      true,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.20.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.20.0.1"),
		ExtraConfig:      nil,
	}, {
		ProviderId:       "dummy-eth2",
		ProviderSubnetId: "dummy-disabled",
		NetworkName:      "juju-disabled",
		CIDR:             "0.30.0.0/24",
		DeviceIndex:      2,
		InterfaceName:    "eth2",
		VLANTag:          2,
		MACAddress:       "aa:bb:cc:dd:ee:f2",
		Disabled:         true,
		NoAutoStart:      false,
		ConfigType:       network.ConfigDHCP,
		Address:          network.NewAddress("0.30.0.2"),
		DNSServers:       network.NewAddresses("ns1.dummy", "ns2.dummy"),
		GatewayAddress:   network.NewAddress("0.30.0.1"),
		ExtraConfig:      nil,
	}}
	info, err := e.NetworkInterfaces("i-42")
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(info, jc.DeepEquals, expectInfo)
	assertInterfaces(c, e, opc, "i-42", expectInfo)

	// Test that with instance id prefix "i-no-nics-" no results are
	// returned.
	info, err = e.NetworkInterfaces("i-no-nics-here")
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(info, gc.HasLen, 0)
	assertInterfaces(c, e, opc, "i-no-nics-here", expectInfo[:0])

	// Test that with instance id prefix "i-nic-no-subnet-" we get a result
	// with no associated subnet.
	expectInfo = []network.InterfaceInfo{{
		DeviceIndex:   0,
		ProviderId:    network.Id("dummy-eth0"),
		NetworkName:   "juju-public",
		InterfaceName: "eth0",
		MACAddress:    "aa:bb:cc:dd:ee:f0",
		Disabled:      false,
		NoAutoStart:   false,
		ConfigType:    network.ConfigDHCP,
	}}
	info, err = e.NetworkInterfaces("i-nic-no-subnet-here")
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(info, gc.HasLen, 1)
	assertInterfaces(c, e, opc, "i-nic-no-subnet-here", expectInfo)

	// Test that with instance id prefix "i-disabled-nic-" we get a result
	// with only a disabled subnet.
	expectInfo = []network.InterfaceInfo{{
		ProviderId:       "dummy-eth2",
		ProviderSubnetId: "dummy-disabled",
		NetworkName:      "juju-disabled",
		CIDR:             "0.30.0.0/24",
		DeviceIndex:      2,
		InterfaceName:    "eth2",
		VLANTag:          2,
		MACAddress:       "aa:bb:cc:dd:ee:f2",
		Disabled:         true,
//.........这里部分代码省略.........

func (s *suite) TestSubnets(c *gc.C) {
	e := s.bootstrapTestEnviron(c, false)
	defer func() {
		err := e.Destroy()
		c.Assert(err, jc.ErrorIsNil)
	}()

	opc := make(chan dummy.Operation, 200)
	dummy.Listen(opc)

	expectInfo := []network.SubnetInfo{{
		CIDR:              "0.10.0.0/24",
		ProviderId:        "dummy-private",
		AllocatableIPLow:  net.ParseIP("0.10.0.0"),
		AllocatableIPHigh: net.ParseIP("0.10.0.255"),
		AvailabilityZones: []string{"zone1", "zone2"},
	}, {
		CIDR:              "0.20.0.0/24",
		ProviderId:        "dummy-public",
		AllocatableIPLow:  net.ParseIP("0.20.0.0"),
		AllocatableIPHigh: net.ParseIP("0.20.0.255"),
	}}
	// Prepare a version of the above with no allocatable range to
	// test the magic "i-no-alloc-" prefix below.
	noallocInfo := make([]network.SubnetInfo, len(expectInfo))
	for i, exp := range expectInfo {
		pid := string(exp.ProviderId)
		pid = strings.TrimPrefix(pid, "dummy-")
		noallocInfo[i].ProviderId = network.Id("noalloc-" + pid)
		noallocInfo[i].AllocatableIPLow = nil
		noallocInfo[i].AllocatableIPHigh = nil
		noallocInfo[i].AvailabilityZones = exp.AvailabilityZones
		noallocInfo[i].CIDR = exp.CIDR
	}

	ids := []network.Id{"dummy-private", "dummy-public", "foo-bar"}
	netInfo, err := e.Subnets("i-foo", ids)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo)
	assertSubnets(c, e, opc, "i-foo", ids, expectInfo)

	// Test filtering by id(s).
	netInfo, err = e.Subnets("i-foo", nil)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo)
	assertSubnets(c, e, opc, "i-foo", nil, expectInfo)
	netInfo, err = e.Subnets("i-foo", ids[0:1])
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo[0:1])
	assertSubnets(c, e, opc, "i-foo", ids[0:1], expectInfo[0:1])
	netInfo, err = e.Subnets("i-foo", ids[1:])
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, expectInfo[1:])
	assertSubnets(c, e, opc, "i-foo", ids[1:], expectInfo[1:])

	// Test that using an instance id with prefix of either
	// "i-no-subnets-" or "i-nic-no-subnet-"
	// returns no results, regardless whether ids are given or not.
	for _, instId := range []instance.Id{"i-no-subnets-foo", "i-nic-no-subnet-foo"} {
		netInfo, err = e.Subnets(instId, nil)
		c.Assert(err, jc.ErrorIsNil)
		c.Assert(netInfo, gc.HasLen, 0)
		assertSubnets(c, e, opc, instId, nil, expectInfo[:0])
	}

	netInfo, err = e.Subnets("i-no-subnets-foo", ids)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, gc.HasLen, 0)
	assertSubnets(c, e, opc, "i-no-subnets-foo", ids, expectInfo[:0])

	// Test the behavior with "i-no-alloc-" instance id prefix.
	// When # is "all", all returned subnets have no allocatable range
	// set and have provider ids with "noalloc-" prefix.
	netInfo, err = e.Subnets("i-no-alloc-all", nil)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(netInfo, jc.DeepEquals, noallocInfo)
	assertSubnets(c, e, opc, "i-no-alloc-all", nil, noallocInfo)

	// When # is an integer, the #-th subnet in result has no
	// allocatable range set and a provider id prefix "noalloc-".
	netInfo, err = e.Subnets("i-no-alloc-0", nil)
	c.Assert(err, jc.ErrorIsNil)
	expectResult := []network.SubnetInfo{noallocInfo[0], expectInfo[1]}
	c.Assert(netInfo, jc.DeepEquals, expectResult)
	assertSubnets(c, e, opc, "i-no-alloc-0", nil, expectResult)

	netInfo, err = e.Subnets("i-no-alloc-1", nil)
	c.Assert(err, jc.ErrorIsNil)
	expectResult = []network.SubnetInfo{expectInfo[0], noallocInfo[1]}
	c.Assert(netInfo, jc.DeepEquals, expectResult)
	assertSubnets(c, e, opc, "i-no-alloc-1", nil, expectResult)

	// For the last case above, also test the error returned when # is
	// not integer or it's out of range of the results (including when
	// filtering by ids is applied).
	netInfo, err = e.Subnets("i-no-alloc-foo", nil)
	c.Assert(err, gc.ErrorMatches, `invalid index "foo"; expected int`)
	c.Assert(netInfo, gc.HasLen, 0)

	netInfo, err = e.Subnets("i-no-alloc-1", ids[:1])
//.........这里部分代码省略.........

func (s *CommonProvisionerSuite) SetUpTest(c *gc.C) {
	// Disable the default state policy, because the
	// provisioner needs to be able to test pathological
	// scenarios where a machine exists in state with
	// invalid environment config.
	dummy.SetStatePolicy(nil)

	s.JujuConnSuite.SetUpTest(c)

	// We do not want to pull published image metadata for tests...
	imagetesting.PatchOfficialDataSources(&s.CleanupSuite, "")
	// We want an image to start test instances
	err := s.State.CloudImageMetadataStorage.SaveMetadata([]cloudimagemetadata.Metadata{{
		cloudimagemetadata.MetadataAttributes{
			Region:          "region",
			Series:          "trusty",
			Arch:            "amd64",
			VirtType:        "",
			RootStorageType: "",
			Source:          "test",
		},
		10,
		"-999",
	}})
	c.Assert(err, jc.ErrorIsNil)

	// Create the operations channel with more than enough space
	// for those tests that don't listen on it.
	op := make(chan dummy.Operation, 500)
	dummy.Listen(op)
	s.op = op

	cfg, err := s.State.EnvironConfig()
	c.Assert(err, jc.ErrorIsNil)
	s.cfg = cfg

	// Create a machine for the dummy bootstrap instance,
	// so the provisioner doesn't destroy it.
	insts, err := s.Environ.Instances([]instance.Id{dummy.BootstrapInstanceId})
	c.Assert(err, jc.ErrorIsNil)
	addrs, err := insts[0].Addresses()
	c.Assert(err, jc.ErrorIsNil)
	machine, err := s.State.AddOneMachine(state.MachineTemplate{
		Addresses:  addrs,
		Series:     "quantal",
		Nonce:      agent.BootstrapNonce,
		InstanceId: dummy.BootstrapInstanceId,
		Jobs:       []state.MachineJob{state.JobManageEnviron},
	})
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(machine.Id(), gc.Equals, "0")

	current := version.Binary{
		Number: version.Current,
		Arch:   arch.HostArch(),
		Series: series.HostSeries(),
	}
	err = machine.SetAgentVersion(current)
	c.Assert(err, jc.ErrorIsNil)

	password, err := utils.RandomPassword()
	c.Assert(err, jc.ErrorIsNil)
	err = machine.SetPassword(password)
	c.Assert(err, jc.ErrorIsNil)

	s.st = s.OpenAPIAsMachine(c, machine.Tag(), password, agent.BootstrapNonce)
	c.Assert(s.st, gc.NotNil)
	c.Logf("API: login as %q successful", machine.Tag())
	s.provisioner = s.st.Provisioner()
	c.Assert(s.provisioner, gc.NotNil)
}