As long as you only want to test…
Use the Graph API Explorer to generate a token with the permissions you want.
Don’t hesitate to select all of them.
Then, just copy/paste the token at the end of each graph.facebook.com URL. For instance:
https://graph.facebook.com/v1.0/me/friends?access_token=<ACCESS_TOKEN>
The day you want to get the access taken for an app…
Start by reading this doc.