To test how your checkout would work with a payment gateway like PayPal, we suggest conducting an actual purchase.
To do this, please go ahead and:
Log into your SupaDupa admin
Click on the Products tab
Go into a Product
Set the product price to say £0.10 / $0.10, then set it to free shipping.
Click Save changes and hit the Preview button
Add this item to your basket and click Checkout
Go through to Checkout, Click the PayPal button and make the payment
Once the order has been placed, you should notice the order appear within your Orders section of your SupaDupa admin. Further, you will also receive an order notification from both PayPal and SupaDupa.
If the test order has not appeared within your SuapDupa admin, please contact email@example.com for further assistance.