Basic plumbing to preserve MessageGroupId and MessageDeduplicationID, if they are provided.

moto/sqs/models.py

@@ -38,6 +38,8 @@ class Message(BaseModel):
         self.sent_timestamp = None
         self.approximate_first_receive_timestamp = None
         self.approximate_receive_count = 0
+        self.deduplication_id = None
+        self.group_id = None
         self.visible_at = 0
         self.delayed_until = 0
 
@@ -400,7 +402,7 @@ class SQSBackend(BaseBackend):
         queue._set_attributes(attributes)
         return queue
 
-    def send_message(self, queue_name, message_body, message_attributes=None, delay_seconds=None):
+    def send_message(self, queue_name, message_body, message_attributes=None, delay_seconds=None, deduplication_id=None, group_id=None):
 
         queue = self.get_queue(queue_name)
 
@@ -412,6 +414,12 @@ class SQSBackend(BaseBackend):
         message_id = get_random_message_id()
         message = Message(message_id, message_body)
 
+        # Attributes, but not *message* attributes
+        if deduplication_id is not None:
+            message.deduplication_id = deduplication_id
+        if group_id is not None:
+            message.group_id = group_id
+
         if message_attributes:
             message.message_attributes = message_attributes
 

moto/sqs/responses.py

@@ -198,6 +198,8 @@ class SQSResponse(BaseResponse):
     def send_message(self):
         message = self._get_param('MessageBody')
         delay_seconds = int(self._get_param('DelaySeconds', 0))
+        message_group_id = self._get_param("MessageGroupId")
+        message_dedupe_id = self._get_param("MessageDeduplicationId")
 
         if len(message) > MAXIMUM_MESSAGE_LENGTH:
             return ERROR_TOO_LONG_RESPONSE, dict(status=400)
@@ -213,7 +215,9 @@ class SQSResponse(BaseResponse):
             queue_name,
             message,
             message_attributes=message_attributes,
-            delay_seconds=delay_seconds
+            delay_seconds=delay_seconds,
+            deduplication_id=message_dedupe_id,
+            group_id=message_group_id
         )
         template = self.response_template(SEND_MESSAGE_RESPONSE)
         return template.render(message=message, message_attributes=message_attributes)
@@ -491,6 +495,18 @@ RECEIVE_MESSAGE_RESPONSE = """<ReceiveMessageResponse>
             <Name>ApproximateFirstReceiveTimestamp</Name>
             <Value>{{ message.approximate_first_receive_timestamp }}</Value>
           </Attribute>
+          {% if message.deduplication_id is not none %}
+          <Attribute>
+            <Name>MessageDeduplicationId</Name>
+            <Value>{{ message.deduplication_id }}</Value>
+          </Attribute>
+          {% endif %}
+          {% if message.group_id is not none %}
+          <Attribute>
+            <Name>MessageGroupId</Name>
+            <Value>{{ message.group_id }}</Value>
+          </Attribute>
+          {% endif %}
           {% if message.message_attributes.items()|count > 0 %}
           <MD5OfMessageAttributes>{{- message.attribute_md5 -}}</MD5OfMessageAttributes>
           {% endif %}