chore: add unit test bash script

[dylan-apex]

Please ensure you have read the contribution guide before creating a pull request.

Link to Issue or Description of Change

1. Link to an existing issue (if applicable):

• Closes: Add a unittests bash script for easier testing #4227

Problem:
Consistency with running unit tests locally

Solution:
Creates a script that you can run that will make sure the unit tests dependencies are installed and up to date, runs the full unit test suite, then restores all the extras.

Testing Plan

Ran the script with and without the format argument. Both passed

Unit Tests:

• I have added or updated unit tests for my change.
• All unit tests pass locally.

Please include a summary of passed pytest results.
=================== 3957 passed, 2132 warnings in 83.80s (0:01:23) ====================

Manual End-to-End (E2E) Tests:

chmod +x unittests.sh
./unittests.sh
./unittests.sh format

Checklist

• I have read the CONTRIBUTING.md document.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have manually tested my changes end-to-end.
• Any dependent changes have been merged and published in downstream modules.

Additional context

Add any other context or screenshots about the feature request here.

[gemini-code-assist]

Summary of Changes

Hello @dylan-apex, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly improves the developer experience by introducing an automated script for running unit tests. It addresses the problem of inconsistent local testing environments by managing dependencies and offering an integrated formatting step, making it easier for contributors to ensure their code is tested and adheres to style guidelines.

Highlights

• New Unit Test Automation Script: A new bash script, unittests.sh, has been introduced to standardize and automate the process of running unit tests locally.
• Automated Environment Management: The script automatically sets up the necessary test environment dependencies (test, eval, a2a extras) before running tests and restores the full development environment (--all-extras) afterwards, ensuring consistency and preventing dependency conflicts.
• Optional Code Formatting Integration: The unittests.sh script now supports an optional format argument, which will execute the autoformat.sh script if all unit tests pass successfully.
• Updated Contribution Guidelines: The CONTRIBUTING.md file has been updated to document the new unittests.sh script, providing clear instructions on its usage and benefits for developers.

🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console.

Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature	Command	Description
Code Review	/gemini review	Performs a code review for the current pull request in its current state.
Pull Request Summary	/gemini summary	Provides a summary of the current pull request in its current state.
Comment	@gemini-code-assist	Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help	/gemini help	Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution. ↩

[gemini-code-assist]

Code Review

This pull request introduces a new shell script, unittests.sh, to standardize the process of running unit tests locally, and updates CONTRIBUTING.md to document it. The script correctly handles setting up a minimal test environment, running tests, and restoring the full development environment. My review focuses on improving the robustness of the new shell script with some best practices. I've suggested using set -euo pipefail, adding a trap to handle interruptions gracefully, and making the argument parsing safer.

[wuliang229]

Thanks. We are reviewing the change already.