test: add grant and revoke tests

[alexstroke1]

Context

• Describe the objective or issue this PR addresses, as well as the impact of the change.
• Try to keep the description accessible to newcomers.
• If you're resolving a specific issue, add "Fixes #issue_number" or "Closes #issue_number".

Solution

• Describe the approach taken to achieve the objective / resolve the issue.

Migration Guide (optional)

• If this PR contains a breaking change relative to the main branch, provide an instruction on how affected parties might need to adapt to the change.

---

Review notes (optional)

• For complex PRs, try to provide some information on how to approach the review more effectively.
• For example, is there a natural order in which the affected files should be reviewed?

Checklist

• I've read CONTRIBUTING.md.
• (optional) I've written unit tests for the code changes.
• All review comments have been resolved.
• All CI checks pass.