[tmm84]

Pretty much my experience as a frontend guy that had to fill in for a team reduction and had to start working on the Rails side of things. I always felt like I was just having to "know" what was going to happen. Unit tests, mocks, etc. were all coming back "ok" but there was always something in production that would act up. I had never this happen with the Java and PHP backends that I always had to touch up when there wasn't much talent available. Before I was let go from the Rails client I suggested that they invest in property based testing for all code as it was quite clear there were cases that weren't being thought of that existed in the application somewhere (undocumented, manually added, etc.).