YAML Test CLI flag mismatch

[zhaoyuanTian123]

here is an inconsistency between the official documentation and the actual code for the YAML test CLI flag.Code: https://github.com/apache/beam/blob/master/sdks/python/apache_beam/yaml/main.py#L103 implements the flag as --test (singular),This mismatch leads to user confusion and failed test runs when following the documentation.

[Eliaaazzz]

I would like to take this issue as well.

My approach will be:

• Code Audit: Verify if --tests (plural) is already used elsewhere in the codebase or if --test (singular) was the intended design choice.

• Alignment:

  • If the Beam standard for YAML tools is plural, I will update main.py to support --tests (potentially keeping --test as an alias for backward compatibility).

  • If singular was intended, I will submit a PR to correct the official documentation.

• Validation: Run the YAML test suite using the corrected flag to ensure the mismatch is resolved.

[Eliaaazzz]

.take-issue