Merge pull request #4203 from segmentio/ashton-huxtable-patch-1

Add actions event testing information

Author: stayseesong

src/connections/destinations/actions.md

@@ -96,6 +96,14 @@ To delete a destination action: click the action to select it, and click **Delet
 
 This takes effect within minutes, and removes the action completely. Any data that would have gone to the destination is not delivered. Once deleted, the saved action cannot be restored.
 
+## Test a destination action
+To test a destination action, follow the instructions in [Testing Connections](/docs/connections/test-connections/). You must enable a mapping in order to test the destination. Otherwise, this error occurs: *You may not have any subscriptions that match this event.*
+
+You can also test within the mapping itself. To test the mapping:
+1. Navigate to the **Mappings** tab of your destination. 
+2. Select a mapping and click the **...** and select **Edit Mapping**. 
+3. In step 2 of the mappings edit page, click **Load Test Event from Source** to add a test event from the source, or you can add your own sample event. 
+4. Scroll to step 4 on the page, and click **Test Mapping** to test the mapping and view the response from the destination. 
 
 ## Customize mappings