Merge pull request #326 from songfangyl/branch-DG-manual-testing

Update manual testing for delete feature

docs/DeveloperGuide.md

@@ -1499,20 +1499,20 @@ testers are expected to do more *exploratory* testing.
        Expected: The most recent window size and location is retained.
 
 
-## Deleting a person
+## Deleting a customer
 
-**Deleting a person while all persons are being shown**
+**Deleting a customer while all customers are being shown**
 
-Prerequisites: List all persons using the `list` command. Multiple persons in the list.
+Prerequisites: List all customers using the `list` command. Multiple customers in the list.
 
    1. Test case: `delete 1`<br>
-      Expected: First contact is deleted from the list. Details of the deleted contact shown in the status message. Timestamp in the status bar is updated.
+      Expected: First customer is deleted from the list. Details of the deleted customer shown in the status message.
 
    1. Test case: `delete 0`<br>
-      Expected: No person is deleted. Error details shown in the status message. Status bar remains the same.
+      Expected: No customer is deleted. Error details shown in the status message. Customer list remains the same.
 
    1. Other incorrect delete commands to try: `delete`, `delete x`, `...` (where x is larger than the list size)<br>
-      Expected: Similar to previous.
+      Expected: No customer is deleted. Error details shown in the status message. Customer list remains the same.
 
 
 ## Updating tags of a customer