Instead of clicking "Post" when creating 'test' posts to see if Optional Link URL is correct, or Optional Image URL is correct, you can instead click on the "Preview" (not "Post") to see if those things are correct.

Then, instead of clicking on the "Post" button, just go back to the Index Page (click on "Return to Index").

These sets the URL links and does not Post a message that simply sez: "test".

Go ahead anybody, try it out. But when it works, please don't post a message confirming that it worked.