Add an acctest to confirm feature_name is not always required

Author: tabito-hara

internal/service/rds/cluster_role_association_test.go

@@ -52,6 +52,38 @@ func TestAccRDSClusterRoleAssociation_basic(t *testing.T) {
 	})
 }
 
+func TestAccRDSClusterRoleAssociation_mysqlWithoutFeatureName(t *testing.T) {
+	ctx := acctest.Context(t)
+	var dbClusterRole types.DBClusterRole
+	rName := sdkacctest.RandomWithPrefix(acctest.ResourcePrefix)
+	dbClusterResourceName := "aws_rds_cluster.test"
+	iamRoleResourceName := "aws_iam_role.test"
+	resourceName := "aws_rds_cluster_role_association.test"
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.PreCheck(ctx, t) },
+		ErrorCheck:               acctest.ErrorCheck(t, names.RDSServiceID),
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories,
+		CheckDestroy:             testAccCheckClusterRoleAssociationDestroy(ctx),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccClusterRoleAssociationConfig_mysqlWithoutFeatureName(rName),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckClusterRoleAssociationExists(ctx, resourceName, &dbClusterRole),
+					resource.TestCheckResourceAttrPair(resourceName, "db_cluster_identifier", dbClusterResourceName, names.AttrID),
+					resource.TestCheckResourceAttr(resourceName, "feature_name", ""),
+					resource.TestCheckResourceAttrPair(resourceName, names.AttrRoleARN, iamRoleResourceName, names.AttrARN),
+				),
+			},
+			{
+				ResourceName:      resourceName,
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func TestAccRDSClusterRoleAssociation_disappears(t *testing.T) {
 	ctx := acctest.Context(t)
 	var dbClusterRole types.DBClusterRole
@@ -214,3 +246,44 @@ data "aws_iam_policy_document" "rds_assume_role_policy" {
 }
 `, rName))
 }
+
+func testAccClusterRoleAssociationConfig_mysqlWithoutFeatureName(rName string) string {
+	return acctest.ConfigCompose(
+		acctest.ConfigAvailableAZsNoOptIn(),
+		fmt.Sprintf(`
+resource "aws_rds_cluster_role_association" "test" {
+  db_cluster_identifier = aws_rds_cluster.test.id
+  role_arn              = aws_iam_role.test.arn
+}
+
+resource "aws_rds_cluster" "test" {
+  cluster_identifier  = %[1]q
+  engine              = "aurora-mysql"
+  availability_zones  = [data.aws_availability_zones.available.names[0], data.aws_availability_zones.available.names[1], data.aws_availability_zones.available.names[2]]
+  database_name       = "mydb"
+  master_username     = "foo"
+  master_password     = "foobarfoobarfoobar"
+  skip_final_snapshot = true
+}
+
+resource "aws_iam_role" "test" {
+  assume_role_policy = data.aws_iam_policy_document.rds_assume_role_policy.json
+  name               = %[1]q
+
+  # ensure IAM role is created just before association to exercise IAM eventual consistency
+  depends_on = [aws_rds_cluster.test]
+}
+
+data "aws_iam_policy_document" "rds_assume_role_policy" {
+  statement {
+    actions = ["sts:AssumeRole"]
+    effect  = "Allow"
+
+    principals {
+      identifiers = ["rds.amazonaws.com"]
+      type        = "Service"
+    }
+  }
+}
+`, rName))
+}