Offering help with Unit Tests

Hi everyone! I noticed a lot of Pull Requests, mainly related to new features and tests.

I'd like to help improve the test coverage using [CodeBeaver](https://www.codebeaver.ai), an AI agent that I built (it's free for open source!). To demonstrate what's possible, I've created a PR:
[Troposphere - Unit Tests](https://github.com/CodeBeaverAI/troposphere/pull/1)
that adds comprehensive tests to the last Pull Request that was opened here: [Do not merge - Prototype intellisense by emitting function signatures for all classes](https://github.com/cloudtools/troposphere/pull/2016).

## What the PR demonstrates:
* Increases coverage with the addition of **3 new test files**.
* Adds comprehensive tests for the recent changes, specifically:
- `tests/test_test_awslambda.py`
- `tests/test_test_basic.py`
- `tests/test_test_mappings.py`

On top of that: If you check the PR, you'll see that CodeBeaver not only aims for coverage but also ensures all edge cases are considered (we make it iterate 3 times on that alone).

## How it works:
CodeBeaver analyzes your code changes in PRs:
* Automatically generates and updates tests.
* Opens PRs with new/updated tests.
* Helps catch bugs before they reach production.

## Next steps
If this interests the maintainer team, I'm happy to:
* Walk through how the tests were generated.
* Help set up automated test generation for future PRs (takes ~5 minutes).
* Focus on specific areas you'd like to improve coverage for.

Let me know what you think! Happy to adapt this approach based on the project's needs.