terraform-provider-google/google/data_source_google_compute_region_instance_group_test.go

package google

import (
	"fmt"
	"testing"

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

func TestAccDataSourceRegionInstanceGroup(t *testing.T) {
	t.Parallel()
	name := "acctest-" + acctest.RandString(6)
	resource.Test(t, resource.TestCase{
		PreCheck:  func() { testAccPreCheck(t) },
		Providers: testAccProviders,
		Steps: []resource.TestStep{
			{
				Config: testAccDataSourceRegionInstanceGroup_basic(name),
				Check: resource.ComposeTestCheckFunc(
					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "name", name),
					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "project", getTestProjectFromEnv()),
					resource.TestCheckResourceAttr("data.google_compute_region_instance_group.data_source", "instances.#", "1")),
			},
		},
	})
}

func testAccDataSourceRegionInstanceGroup_basic(instanceManagerName string) string {
	return fmt.Sprintf(`
resource "google_compute_target_pool" "foo" {
	name = "%s"
}

data "google_compute_image" "debian" {
	project = "debian-cloud"
	name    = "debian-9-stretch-v20171129"
}

resource "google_compute_instance_template" "foo" {
	machine_type = "n1-standard-1"
	disk {
		source_image = "${data.google_compute_image.debian.self_link}"
	}
	network_interface {
		access_config {
		}
		network = "default"
	}
}

resource "google_compute_region_instance_group_manager" "foo" {
	name = "%s"
	base_instance_name = "foo"
	instance_template  = "${google_compute_instance_template.foo.self_link}"
	region = "us-central1"
	target_pools = ["${google_compute_target_pool.foo.self_link}"]
	target_size = 1

	named_port {
		name = "web"
		port = 80
	}
	wait_for_instances = true
}

data "google_compute_region_instance_group" "data_source" {
	self_link = "${google_compute_region_instance_group_manager.foo.instance_group}"
}
`, acctest.RandomWithPrefix("test-rigm-"), instanceManagerName)
}