Add notes for testing on CODE

docs/testing/user-deletion.md

@@ -1,5 +1,33 @@
 ### Testing User Deletion on CODE
 
+### Testing via the website
 * Sign in to the website on [CODE](https://code.dev-theguardian.com/uk)
 * Under My Account -> Settings scroll down and hit Delete Account
-* Check the cloudwatch output in the [user delete lambda](https://eu-west-1.console.aws.amazon.com/lambda/home?region=eu-west-1#/functions/mobile-save-for-later-user-deletion-CODE?tab=monitoring)
+* Check the cloudwatch output in the [user delete lambda](https://eu-west-1.console.aws.amazon.com/lambda/home?region=eu-west-1#/functions/mobile-save-for-later-user-deletion-CODE?tab=monitoring)
+
+### Testing the lambda directly
+
+* Go to the [user delete lambda](https://eu-west-1.console.aws.amazon.com/lambda/home?region=eu-west-1#/functions/mobile-save-for-later-user-deletion-CODE?tab=monitoring)
+* Run the test tab with this message structure:
+```agsl
+{
+  "Records": [
+    {
+      "messageId": "19dd0b57-b21e-4ac1-bd88-01bbb068cb78",
+      "receiptHandle": "MessageReceiptHandle",
+      "body": "{\"Message\": { \"userId\": \"1\"}}",
+      "attributes": {
+        "ApproximateReceiveCount": "1",
+        "SentTimestamp": "1523232000000",
+        "SenderId": "123456789012",
+        "ApproximateFirstReceiveTimestamp": "1523232000001"
+      },
+      "messageAttributes": {},
+      "md5OfBody": "{{{md5_of_body}}}",
+      "eventSource": "aws:sqs",
+      "eventSourceARN": "arn:aws:sqs:us-east-1:123456789012:MyQueue",
+      "awsRegion": "us-east-1"
+    }
+  ]
+}
+```