Is there a way to only run tests with a certain dependency?

[charlietsai]

I am using Pants with Python and would like to only run tests with and without a certain dependency. This particular dependency provides some native library integrations and is a bit peculiar with resources used, so we want to run it separately in our CI process. One job will run all tests with this dependency and another job will run all tests without this dependency.

Is there a way to do this?

I tried using dependees and pipe-ing that to pants test but that didn't seem to work. I also don't know how to do the inverse of that where I want to exclude that dependency and run all other tests.

Any help appreciated!

[kaos]

I think you were pretty close, as there is no advanced search/filtering built into Pants. Perhaps something like:

$ pants dependents --transitive <some dependency> | sort > tgts-depending-on-some-dep.specs
$ pants list :: | sort > all.specs
$ comm -1 -3 some-deps.specs all.specs > tgts-not-depending-on-some-dep.specs

Then you can use the two tgts-..specs files as needed with subsequent runs:

$ pants --spec-files=tgts-not-depending-on-some-dep.specs test
# etc..

[charlietsai]

Thanks for the examples! I missed the whole documentation about using --spec-files for filtering. That sounds like exactly what I want and I'll be able to easily verify it too.

I can confirm this works.