Does pants support distributed unittests?

You mean python unit tests via pytest xdist for example?

Yeah, or something similar. When I worked at Google, I used to use a command called bazel test <path>. That command send all the tests to run on a single borg cluster.

That we are actually hard at work on - exactly that. We won't be able to say ready for use for a while though.

Does the current version of pants supports that?

No