Add guest accelerator skip test for instances.

Author: jacobstr

google/resource_compute_instance_test.go

@@ -740,7 +740,7 @@ func TestAccComputeInstance_guestAccelerator(t *testing.T) {
 		CheckDestroy: testAccCheckComputeInstanceDestroy,
 		Steps: []resource.TestStep{
 			resource.TestStep{
-				Config: testAccComputeInstance_guestAccelerator(instanceName),
+				Config: testAccComputeInstance_guestAccelerator(instanceName, 1),
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckComputeInstanceExists("google_compute_instance.foobar", &instance),
 					testAccCheckComputeInstanceHasGuestAccelerator(&instance, "nvidia-tesla-k80", 1),
@@ -751,6 +751,29 @@ func TestAccComputeInstance_guestAccelerator(t *testing.T) {
 
 }
 
+func TestAccComputeInstance_guestAcceleratorSkip(t *testing.T) {
+	t.Parallel()
+
+	var instance compute.Instance
+	instanceName := fmt.Sprintf("terraform-test-%s", acctest.RandString(10))
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeInstanceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccComputeInstance_guestAccelerator(instanceName, 0),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeInstanceExists("google_compute_instance.foobar", &instance),
+					testAccCheckComputeInstanceLacksGuestAccelerator(&instance),
+				),
+			},
+		},
+	})
+
+}
+
 func TestAccComputeInstance_minCpuPlatform(t *testing.T) {
 	t.Parallel()
 
@@ -1219,6 +1242,16 @@ func testAccCheckComputeInstanceHasGuestAccelerator(instance *compute.Instance,
 	}
 }
 
+func testAccCheckComputeInstanceLacksGuestAccelerator(instance *compute.Instance) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		if len(instance.GuestAccelerators) > 0 {
+			return fmt.Errorf("Expected no guest accelerators")
+		}
+
+		return nil
+	}
+}
+
 func testAccCheckComputeInstanceHasMinCpuPlatform(instance *compute.Instance, minCpuPlatform string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		if instance.MinCpuPlatform != minCpuPlatform {
@@ -2203,7 +2236,7 @@ resource "google_compute_subnetwork" "inst-test-subnetwork" {
 `, instance, network, subnetwork)
 }
 
-func testAccComputeInstance_guestAccelerator(instance string) string {
+func testAccComputeInstance_guestAccelerator(instance string, count uint8) string {
 	return fmt.Sprintf(`
 resource "google_compute_instance" "foobar" {
   name = "%s"
@@ -2226,10 +2259,10 @@ resource "google_compute_instance" "foobar" {
   }
 
   guest_accelerator {
-    count = 1
+    count = %d
     type = "nvidia-tesla-k80"
   }
-}`, instance)
+}`, instance, count)
 }
 
 func testAccComputeInstance_minCpuPlatform(instance string) string {