Add ut for tf_transformers

[shijinye]

Summary

Add ut for tf_transformers

Details

add ut for tf_transformers from 31% to 100%

Test Plan

pytest -v tests/unit/utils/test_hf_transformers.py

pytest --cov=guidellm tests/unit/utils

Related Issues

• Resolves # none

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• "I certify that all code in this PR is my own, except as noted below."

Use of AI

• Includes AI-assisted code completion
• Includes code generated by an AI application
• Includes AI-generated tests (NOTE: AI written tests should have a docstring that includes ## WRITTEN BY AI ##)

[sjmonson]

Thanks for the contribution! See linting/quality failures as blocking before merge. You can run checks locally with tox -e types,style.

[shijinye]

Collaborator

Thanks for your suggestion! I have updated these issues. @sjmonson