Function spec checking should be opt-in

Since 0.0-266, kaocha is using orchestra for checking function specs.

In my codebase, I use fixtures to enable spec instrumentation per namespace as needed. This is because in some instances I do not care if my specs are strictly valid (e.g using some dummy data to test methods against a DB for filtering/sorting etc where a field might be “A” instead of some string matching some stricter regex as defined in a spec).

Because I opt in via my code, running tests in cursive or via lein test are equivalent.

Kaocha by default adds spec instrumentation across my entire codebase, which is intrusive and also means it is not a drop in test runner replacement.

I would like this to be disabled by default or at least able to be turned off. Ultimately kaocha shouldn’t force me to rewrite code just to be able to use it.

Start by tracing how Kaocha invokes Orchestra function-spec checking and how namespace fixtures enable instrumentation. Compare Kaocha runs with Cursive or lein test, then determine how an opt-out or opt-in setting should behave. Done means instrumentation is not forced by default while explicit per-namespace instrumentation remains usable.