Today on Gmail, I got my inbox down to inbox -50:
How do you do that?
Well, in my case, I deleted a large number of emails from an unused email box and then, when it hung up, I deleted them again.
How do you test for that?
Well, if you’re me, you not only use an automated testing tool like Selenium or WATIR not only for interface checking, but to create large record sets to then use in manual testing. For example, you set up a script that adds 10,000 comments and then manually test to see what happens when you go to an item with a large number of comments. You can inspect how it looks (is the number too big for the space allocated to it on the page) but also what happens when you add another comment, when you delete the item, when you recommend the item to a friend.