Check paypal download page

Someone order a product on my site, get send to paypal, pays for a product, should get send to the product download page. How can I check that this system works, that the customer actually get sent to the download page?

 

I think there is a Paypal sand box buttons.

https://developer.paypal.com/

This is for you.

 

Hi yourihost.
What do you mean?

 

Go to that URL i gave , signup and it will give you instructions on how to test your Cart without spending money.

 

Thanks. I did that, but cant find instructions to test my button on my current web page.