Automatic file detection

[jamestalmage]

For codemods like same => deepEquals, we should just examine the AVA config in package.json to determine which files are test files, which are sources, etc.

We could do similar things for mocha/tap/etc by parsing their configs. (not sure we want to go down that road).

[jfmengels]

I understand your reasoning behind for the first part, but that may not include test helper files. For instance, if your tests are in test.js, and you wrote your assertion helpers (which use t.same()) in test-helper.js, then you would not update the right file.

[jamestalmage]

Right, our code would need to figure that out. The convention is they can be in a helpers folder, or prefixed with a _.

I think we should do this once, in AVA itself, so other modules can reuse it: avajs/ava#700

[vadimdemedes]

And we shouldn't forget about fixtures.