Some tests save you time. Some tests don't. It's perfectly possible to write a huge, fragile, heavily coupled test suite which takes days or weeks to modify whe

Some tests save you time. Some tests don't. It's perfectly possible to write a huge, fragile, heavily coupled test suite which takes days or weeks to modify when you make even a tiny change to the code it's testing. Just as code falls on a spectrum between clean and completely unmaintainable, so do tests.