This test suite heavily borrows from HF Transformers, therefore you can refer to the its testing docs for in-depth details. In particular wrt writing new tests, as we have access a lot of helper classes and functions, so you can write tests very quickly and not need to reinvent the wheel.
The foundation is pytest, which allows you to write normal pytest tests, but we also use a lot of unit tests in particular via TestCasePlus which extends unittest and provides additional rich functionality.
make test
or:
pytest tests
Important: the first time you run this it can take some minutes to build all the Megatron cuda kernels and deepspeed kernels if you haven't pre-built the latter.
For various other options please see the doc mentioned at the very top.
You will want to have at least 1 gpu available, best 2 to run the tests.
The CI setup is documented here.