Running all dependent tests

[glin...@gmail.com]

Is there something like `bazel test //foo/bar:...`, except it runs all the tests in packages that this package depends on as well?

ie. if foo/bar/BUILD depended on the `//baz` target, we'd like it to be run.

Thanks!
Gary

[Kamal Marhubi]

You can do this with a query and xargs, something like `bazel query deps(//foo/bar:all) | xargs bazel test`. There may be a way to pass the query directly to test, but I didn't see anything in `bazel help target-syntax`.

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[Damien Martin-guillerez]

If my memory serves me right:

bazel test $(bazel query 'kind(test, deps(//foo/bar:all))')

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[glin...@gmail.com]

Awesome, thanks!

[mcfarla...@gmail.com]

Similar question: is there a way to run (or list) all tests that depend on a given cc_library? Thanks

[Austin Schuh]

Tweak //foo/bar:all and you should be good.  bazel query is very flexible, and the docs have a bunch of examples in them.

Austin

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[Brian Silverman]

tests(rdeps(//whatever:my_lib)) will get you all the dependent tests.

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[John McFarlane]

That's what I was looking for. Thanks!

[ittai zeidman]

May I ask why you're trying to do this?

Trying to understand usage patterns of bazel.

Thanks!

[John McFarlane]

Sure. I'm working on a particular library target and wanted to test changes to it and the other targets it affects without building everything in the workspace.

[ittai zeidman]

but if you only changed that target and build everything shouldn't you get the same outcome thanks to bazel's DAG?

[John McFarlane]

Assuming everything else is built already, yes. But if it isn't, it can be a long wait after you've just puled.

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[ittai zeidman]

I understand.
I'm thinking of the distributed cache solution where if you've pulled the cache is very likely populated.
Thanks for the clarification!