Around this time last year, I was developing a website for my wedding. The primary function of this website was to have guests RSVP on the site, so we could save a little money on postage and letterhead. I performed a thorough set of testing scenarios on Chrome, Firefox, and Edge, even employing the browsers’ mobile simulators. Everything seemed to work fine, so we sent out the invites and waited for RSVPs.
About a week afterwards, I got a text from my aunt; she couldn’t submit her RSVP! Why didn’t I catch this flaw in my testing?