[antoineMoPa]

It's weird to write the test after solving the problem. You should write the test before solving the problem to get the most benefit. You can then edit + compile + run test until the test pass and normally this is shorter than the "edit+compile+start app+replicate bug manually in application+debug" loop.

[horsawlarway]

Depends on the bug - most times I'm breaking out the debugger it's because I have a timing/race condition somewhere, or an unexpected interaction with some other service/component.

Basically - the debugger is not a tool I use if the issue is clear and reproducible.

Those are also issues where it can be hard to write a correct test up front. Typically - tests are passing already, but we're seeing intermittant problems somewhere. Once we understand the interaction and the root of the problem, it's much easier to put a test in place.