Issue:
The normal expected functionality with "Post To Your Feed" form in the sandbox app is broken.
Test 1:
Login with username=alice and password=monkey1. What happens if you post data to the feed? Does it work in the same way that it did before you changed the code? You can reset the sandbox to find out.
Test 2:
What happens if you post multiple times to the the feed? Does it work in the same way that it did before you changed the code? You can reset the sandbox to find out.
Test 3:
What happens if you log in as a different user and post to the feed? Try username=bob and password=password .