> I think you make the assumption that the person writing the test will be able to write a test that will trigger only when the same bug would happen. I'm awar

> I think you make the assumption that the person writing the test will be able to write a test that will trigger only when the same bug would happen. I'm aware of this, it still comes down to weighing up the costs vs benefits. It's not practical to write a test for every small behaviour of a complex app.