🐞 bug report

Affected Rule

Gazelle with # gazelle:python_generation_mode project

Is this a regression?

Yes, the previous version in which this bug was not present was: 0.26.0

Description

Since 0.27.0, having # gazelle:python_generation_mode project Gazelle directive is generating an empty py_test despite __test__.py not existing.

I believe it is related this change: #1538

For example,

py_test(
    name = "folder_test",
    imports = ["../.."],
    main = "__test__.py",
)

There isn't even a srcs parameter, so it doesn't even work.

🔬 Minimal Reproduction

• A directory with Python files and a BUILD.bazel
  • No test files
  • No __test__.py
• Add # gazelle:python_generation_mode project directive
• Run Python Gazelle on that directory

🌍 Your Environment

• Replicated on both MacOS and Ubuntu Linux