resource/aws_cloudformation_stack: Fix perpetual diff on template with transform

aws/resource_aws_cloudformation_stack.go

@@ -291,7 +291,8 @@ func resourceAwsCloudFormationStackRead(d *schema.ResourceData, meta interface{}
  }
 
  tInput := cloudformation.GetTemplateInput{
- StackName: aws.String(d.Id()),
+ StackName: aws.String(d.Id()),
+ TemplateStage: aws.String("Original"),
  }
  out, err := conn.GetTemplate(&tInput)
  if err != nil {

aws/resource_aws_cloudformation_stack_test.go

@@ -258,6 +258,32 @@ func TestAccAWSCloudFormationStack_withUrl_withParams_noUpdate(t *testing.T) {
  })
 }
 
+func TestAccAWSCloudFormationStack_withTransform(t *testing.T) {
+ var stack cloudformation.Stack
+ rName := fmt.Sprintf("tf-acc-test-with-transform-%s", acctest.RandString(10))
+
+ resource.ParallelTest(t, resource.TestCase{
+ PreCheck: func() { testAccPreCheck(t) },
+ Providers: testAccProviders,
+ CheckDestroy: testAccCheckAWSCloudFormationDestroy,
+ Steps: []resource.TestStep{
+ {
+ Config: testAccAWSCloudFormationStackConfig_withTransform(rName),
+ Check: resource.ComposeTestCheckFunc(
+ testAccCheckCloudFormationStackExists("aws_cloudformation_stack.with-transform", &stack),
+ ),
+ },
+ {
+ PlanOnly: true,
+ Config: testAccAWSCloudFormationStackConfig_withTransform(rName),
+ Check: resource.ComposeTestCheckFunc(
+ testAccCheckCloudFormationStackExists("aws_cloudformation_stack.with-transform", &stack),
+ ),
+ },
+ },
+ })
+}
+
 func testAccCheckCloudFormationStackExists(n string, stack *cloudformation.Stack) resource.TestCheckFunc {
  return func(s *terraform.State) error {
  rs, ok := s.RootModule().Resources[n]
@@ -710,3 +736,58 @@ resource "aws_cloudformation_stack" "with-url-and-params-and-yaml" {
 }
 `, rName, bucketKey, vpcCidr)
 }
+
+func testAccAWSCloudFormationStackConfig_withTransform(rName string) string {
+ return fmt.Sprintf(`
+resource "aws_cloudformation_stack" "with-transform" {
+ name = "%[1]s"
+
+ template_body = <<STACK
+{
+ "AWSTemplateFormatVersion": "2010-09-09",
+ "Transform": "AWS::Serverless-2016-10-31",
+ "Resources": {
+ "Api": {
+ "Type": "AWS::Serverless::Api",
+ "Properties": {
+ "StageName": "Prod",
+ "EndpointConfiguration": "REGIONAL",
+ "DefinitionBody": {
+ "swagger": "2.0",
+ "paths": {
+ "/": {
+ "get": {
+ "consumes": ["application/json"],
+ "produces": ["application/json"],
+ "responses": {
+ "200": {
+ "description": "200 response"
+ }
+ },
+ "x-amazon-apigateway-integration": {
+ "responses": {
+ "default": {
+ "statusCode": "200"
+ }
+ },
+ "requestTemplates": {
+ "application/json": "{\"statusCode\": 200}"
+ },
+ "passthroughBehavior": "when_no_match",
+ "type": "mock"
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+}
+STACK
+ capabilities = ["CAPABILITY_AUTO_EXPAND"]
+ on_failure = "DELETE"
+ timeout_in_minutes = 10
+}
+`, rName)
+}