Add a ship_date column to the orders table, and send a notification when this value is updated by the OrdersController. Discuss

Update the application to send an e-mail to the system administrator, namely yourself, when there is an application failure such as the one we handled in Section 10.2, Iteration E2: Handling Errors, on page 133. Discuss

Add integration tests for both of the above. Discuss

h4. Possible test error I implemented line_item delete which used button_to method. This will result in a test error called ActionView::Template::Error: Missing host to link to! Please provide :host parameter or set default_url_options[:host] I have a “if not @cart.nil?” at the end of button_to to prevent this error