github.com/vtorhonen/terraform@v0.9.0-beta2.0.20170307220345-5d894e4ffda7/builtin/providers/openstack/resource_openstack_networking_floatingip_v2_test.go

package openstack

import (
	"fmt"
	"testing"

	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"

	"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
	"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/layer3/floatingips"
)

func TestAccNetworkingV2FloatingIP_basic(t *testing.T) {
	var fip floatingips.FloatingIP

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckNetworkingV2FloatingIPDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccNetworkingV2FloatingIP_basic,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckNetworkingV2FloatingIPExists("openstack_networking_floatingip_v2.fip_1", &fip),
				),
			},
		},
	})
}

func TestAccNetworkingV2FloatingIP_attach(t *testing.T) {
	var instance servers.Server
	var fip floatingips.FloatingIP

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckNetworkingV2FloatingIPDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccNetworkV2FloatingIP_attach,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckNetworkingV2FloatingIPExists("openstack_networking_floatingip_v2.fip_1", &fip),
					testAccCheckComputeV2InstanceExists("openstack_compute_instance_v2.instance_1", &instance),
					testAccCheckNetworkingV2InstanceFloatingIPAttach(&instance, &fip),
				),
			},
		},
	})
}

func TestAccNetworkingV2FloatingIP_fixedip_bind(t *testing.T) {
	var fip floatingips.FloatingIP

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckNetworkingV2FloatingIPDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccNetworkingV2FloatingIP_fixedip_bind,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckNetworkingV2FloatingIPExists("openstack_networking_floatingip_v2.fip_1", &fip),
					testAccCheckNetworkingV2FloatingIPBoundToCorrectIP(&fip, "192.168.199.20"),
				),
			},
		},
	})
}

func testAccCheckNetworkingV2FloatingIPDestroy(s *terraform.State) error {
	config := testAccProvider.Meta().(*Config)
	networkClient, err := config.networkingV2Client(OS_REGION_NAME)
	if err != nil {
		return fmt.Errorf("Error creating OpenStack floating IP: %s", err)
	}

	for _, rs := range s.RootModule().Resources {
		if rs.Type != "openstack_networking_floatingip_v2" {
			continue
		}

		_, err := floatingips.Get(networkClient, rs.Primary.ID).Extract()
		if err == nil {
			return fmt.Errorf("FloatingIP still exists")
		}
	}

	return nil
}

func testAccCheckNetworkingV2FloatingIPExists(n string, kp *floatingips.FloatingIP) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		rs, ok := s.RootModule().Resources[n]
		if !ok {
			return fmt.Errorf("Not found: %s", n)
		}

		if rs.Primary.ID == "" {
			return fmt.Errorf("No ID is set")
		}

		config := testAccProvider.Meta().(*Config)
		networkClient, err := config.networkingV2Client(OS_REGION_NAME)
		if err != nil {
			return fmt.Errorf("Error creating OpenStack networking client: %s", err)
		}

		found, err := floatingips.Get(networkClient, rs.Primary.ID).Extract()
		if err != nil {
			return err
		}

		if found.ID != rs.Primary.ID {
			return fmt.Errorf("FloatingIP not found")
		}

		*kp = *found

		return nil
	}
}

func testAccCheckNetworkingV2FloatingIPBoundToCorrectIP(fip *floatingips.FloatingIP, fixed_ip string) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		if fip.FixedIP != fixed_ip {
			return fmt.Errorf("Floating ip associated with wrong fixed ip")
		}

		return nil
	}
}

func testAccCheckNetworkingV2InstanceFloatingIPAttach(
	instance *servers.Server, fip *floatingips.FloatingIP) resource.TestCheckFunc {

	// When Neutron is used, the Instance sometimes does not know its floating IP until some time
	// after the attachment happened. This can be anywhere from 2-20 seconds. Because of that delay,
	// the test usually completes with failure.
	// However, the Fixed IP is known on both sides immediately, so that can be used as a bridge
	// to ensure the two are now related.
	// I think a better option is to introduce some state changing config in the actual resource.
	return func(s *terraform.State) error {
		for _, networkAddresses := range instance.Addresses {
			for _, element := range networkAddresses.([]interface{}) {
				address := element.(map[string]interface{})
				if address["OS-EXT-IPS:type"] == "fixed" && address["addr"] == fip.FixedIP {
					return nil
				}
			}
		}
		return fmt.Errorf("Floating IP %+v was not attached to instance %+v", fip, instance)
	}
}

const testAccNetworkingV2FloatingIP_basic = `
resource "openstack_networking_floatingip_v2" "fip_1" {
}
`

var testAccNetworkV2FloatingIP_attach = fmt.Sprintf(`
resource "openstack_networking_floatingip_v2" "fip_1" {
}

resource "openstack_compute_instance_v2" "instance_1" {
  name = "instance_1"
  security_groups = ["default"]
  floating_ip = "${openstack_networking_floatingip_v2.fip_1.address}"

  network {
    uuid = "%s"
  }
}
`, OS_NETWORK_ID)

var testAccNetworkingV2FloatingIP_fixedip_bind = fmt.Sprintf(`
resource "openstack_networking_network_v2" "network_1" {
  name = "network_1"
  admin_state_up = "true"
}

resource "openstack_networking_subnet_v2" "subnet_1" {
  name = "subnet_1"
  cidr = "192.168.199.0/24"
  ip_version = 4
  network_id = "${openstack_networking_network_v2.network_1.id}"
}

resource "openstack_networking_router_interface_v2" "router_interface_1" {
  router_id = "${openstack_networking_router_v2.router_1.id}"
  subnet_id = "${openstack_networking_subnet_v2.subnet_1.id}"
}

resource "openstack_networking_router_v2" "router_1" {
  name = "router_1"
  external_gateway = "%s"
}

resource "openstack_networking_port_v2" "port_1" {
  admin_state_up = "true"
  network_id = "${openstack_networking_subnet_v2.subnet_1.network_id}"

  fixed_ip {
    subnet_id = "${openstack_networking_subnet_v2.subnet_1.id}"
    ip_address = "192.168.199.10"
  }

  fixed_ip {
    subnet_id = "${openstack_networking_subnet_v2.subnet_1.id}"
    ip_address = "192.168.199.20"
  }
}

resource "openstack_networking_floatingip_v2" "fip_1" {
  pool = "%s"
  port_id = "${openstack_networking_port_v2.port_1.id}"
  fixed_ip = "${openstack_networking_port_v2.port_1.fixed_ip.1.ip_address}"
}
`, OS_EXTGW_ID, OS_POOL_NAME)