fix: `TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPublicl…

…yAccessible` you need a snapshot to be able to update the capacity. During the creation of this `conflictExceptions` occur. We already retry on the deletion for it so it makes sense for update aswell.

make testacc TESTARGS='-run=TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible' PKG=redshiftserverless
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.22.6 test ./internal/service/redshiftserverless/... -v -count 1 -parallel 20  -run=TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible -timeout 360m
=== RUN   TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible
=== PAUSE TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible
=== CONT  TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible
--- PASS: TestAccRedshiftServerlessWorkgroup_baseAndMaxCapacityAndPubliclyAccessible (2002.95s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/redshiftserverless 2007.594s

internal/service/redshiftserverless/workgroup.go

@@ -475,8 +475,14 @@ func resourceWorkgroupDelete(ctx context.Context, d *schema.ResourceData, meta i
 }
 
 func updateWorkgroup(ctx context.Context, conn *redshiftserverless.Client, input *redshiftserverless.UpdateWorkgroupInput, timeout time.Duration) error {
+	_, err := tfresource.RetryWhenIsAErrorMessageContains[*awstypes.ConflictException](ctx, workgroupUpdatedTimeout,
+		func() (interface{}, error) {
+			return conn.UpdateWorkgroup(ctx, input)
+		},
+		// "ConflictException: There is an operation running on the workgroup. Try to update it later."
+		"operation running")
+
 	name := aws.ToString(input.WorkgroupName)
-	_, err := conn.UpdateWorkgroup(ctx, input)
 
 	if err != nil {
 		return fmt.Errorf("updating Redshift Serverless Workgroup (%s): %w", name, err)
@@ -491,6 +497,7 @@ func updateWorkgroup(ctx context.Context, conn *redshiftserverless.Client, input
 
 const (
 	workgroupDeletedTimeout = 10 * time.Minute
+	workgroupUpdatedTimeout = 10 * time.Minute
 )
 
 func findWorkgroupByName(ctx context.Context, conn *redshiftserverless.Client, name string) (*awstypes.Workgroup, error) {

internal/service/redshiftserverless/workgroup_test.go

@@ -403,6 +403,12 @@ resource "aws_redshiftserverless_workgroup" "test" {
   workgroup_name = %[1]q
   base_capacity  = %[2]d
 }
+
+resource "aws_redshiftserverless_snapshot" "test" {
+  namespace_name   = aws_redshiftserverless_workgroup.test.namespace_name
+  snapshot_name    = %[1]q
+  retention_period = 10
+}
 `, rName, baseCapacity)
 }