fix(awssqs): include MessageGroupId in SQS SendMessage request

The MessageGroupId was being processed in templating but not actually
used when sending messages to SQS. This fix ensures that when a
MessageGroupId is specified in the notification template, it's properly
included in the SendMessageInput, which is required for FIFO queues.

- Add MessageGroupId to SendMessageInput when available
- Add unit tests to verify MessageGroupId inclusion/exclusion behavior
- Fix ensures proper FIFO queue message grouping functionality

Author: tommyk1m

pkg/services/awssqs.go

@@ -67,11 +67,18 @@ func (s awsSqsService) Send(notif Notification, dest Destination) error {
 }
 
 func (s awsSqsService) sendMessageInput(queueUrl *string, notif Notification) *sqs.SendMessageInput {
-	return &sqs.SendMessageInput{
+	input := &sqs.SendMessageInput{
 		QueueUrl:     queueUrl,
 		MessageBody:  aws.String(notif.Message),
 		DelaySeconds: 10,
 	}
+
+	// Add MessageGroupId if available (required for FIFO queues)
+	if notif.AwsSqs != nil && notif.AwsSqs.MessageGroupId != "" {
+		input.MessageGroupId = aws.String(notif.AwsSqs.MessageGroupId)
+	}
+
+	return input
 }
 func (s awsSqsService) getQueueInput(dest Destination) *sqs.GetQueueUrlInput {
 	result := &sqs.GetQueueUrlInput{}

pkg/services/awssqs_test.go

@@ -213,6 +213,61 @@ func TestGetClientOptionsCustomEndpointUrl_AwsSqs(t *testing.T) {
 	assert.Equal(t, 2, len(options))
 }
 
+func TestSendMessageInput_WithMessageGroupId_AwsSqs(t *testing.T) {
+	s := NewTypedAwsSqsService(AwsSqsOptions{})
+	queueUrl := "https://sqs.us-east-1.amazonaws.com/123456789012/test-queue.fifo"
+
+	notification := Notification{
+		Message: "Hello",
+		AwsSqs: &AwsSqsNotification{
+			MessageGroupId: "test-group-id",
+		},
+	}
+
+	input := SendMessageInput(s, &queueUrl, notification)
+
+	assert.Equal(t, &queueUrl, input.QueueUrl)
+	assert.Equal(t, "Hello", *input.MessageBody)
+	assert.Equal(t, int32(10), input.DelaySeconds)
+	assert.Equal(t, "test-group-id", *input.MessageGroupId)
+}
+
+func TestSendMessageInput_WithoutMessageGroupId_AwsSqs(t *testing.T) {
+	s := NewTypedAwsSqsService(AwsSqsOptions{})
+	queueUrl := "https://sqs.us-east-1.amazonaws.com/123456789012/test-queue"
+
+	notification := Notification{
+		Message: "Hello",
+		AwsSqs: &AwsSqsNotification{
+			MessageGroupId: "", // Empty string
+		},
+	}
+
+	input := SendMessageInput(s, &queueUrl, notification)
+
+	assert.Equal(t, &queueUrl, input.QueueUrl)
+	assert.Equal(t, "Hello", *input.MessageBody)
+	assert.Equal(t, int32(10), input.DelaySeconds)
+	assert.Nil(t, input.MessageGroupId) // Should not be set
+}
+
+func TestSendMessageInput_WithoutAwsSqsNotification_AwsSqs(t *testing.T) {
+	s := NewTypedAwsSqsService(AwsSqsOptions{})
+	queueUrl := "https://sqs.us-east-1.amazonaws.com/123456789012/test-queue"
+
+	notification := Notification{
+		Message: "Hello",
+		AwsSqs:  nil, // No AWS SQS notification
+	}
+
+	input := SendMessageInput(s, &queueUrl, notification)
+
+	assert.Equal(t, &queueUrl, input.QueueUrl)
+	assert.Equal(t, "Hello", *input.MessageBody)
+	assert.Equal(t, int32(10), input.DelaySeconds)
+	assert.Nil(t, input.MessageGroupId) // Should not be set
+}
+
 // Helpers
 var GetConfigOptions = (*awsSqsService).getConfigOptions
 var GetClientOptions = (*awsSqsService).getClientOptions