feat: Add customPoolsPriority configs + bug unit tests

[rackstar]

Context

Add unit tests for the bug + add custom pools priority configs

Changes proposed in this pull request

• Add unit tests for the bug
• add custom pools priority configs

Test plan

• add unit tests

Checklist

• [x] Rebased the base branch
• [ ] Attached corresponding Github issue
• [x] Prefixed the name with the type of change (i.e. feat, chore, test)
• [x] Performed a self-review of my own code
• [x] Followed the style guidelines of this project
• [ ] Made corresponding changes to the documentation
• [x] Didn't generate new warnings
• [x] Didn't generate failures on existing tests
• [x] Added tests that prove my fix is effective or that my feature works

Review

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• :cake: = Nice to have but not essential.
• :bulb: = Suggestion or a comment based on personal opinion
• :hammer: = I believe this should be changed.
• :thinking: = I don’t understand something, do you mind giving me more context?
• :rocket: = Feedback