Bazel rules for python_pytest

Bazel rules to run your Python unit tests with pytest.

pytest support in rules_python is not provided out of the box, see https://github.com/bazelbuild/rules_python/issues/240 and https://github.com/bazelbuild/rules_python/pull/464. Progress on the feature request seems to have stagnated so I've gone ahead and put at least something in the public domain until rules_python offers it.

Features:

• Run unit tests with pytest
• Supports test filtering with Bazel's --test_filter= option

Installation

From the release you wish to use: https://github.com/caseyduquettesc/rules_python_pytest/releases copy the WORKSPACE snippet into your WORKSPACE file or the bazel_dep if you use bzlmod.

Usage

load("@rules_python_pytest//python_pytest:defs.bzl", "py_pytest_test")

py_pytest_test(
    name = "test_w_pytest",
    size = "small",
    srcs = ["test.py"],
    deps = [
      # TODO Add this for the user
      requirement("pytest"),
    ],
)

To use test sharding, also add requirement("pytest-shard") to deps.

Disclaimer

I rely on this myself and will accept issue reports and contributions, however this only has a simple smoke test and isn't documented terribly well. I will maintain this, however the expectation is that this will eventually be rolled into rules_python and at that point these rules will be deprecated.