Add test assertions with Syrupy

[joostlek]

Proposed change

Use Syrupy to compare results with a pre made snapshot

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (which adds functionality)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [x] Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• [ ] The code change is tested and works locally.
• [ ] Local tests pass.
• [ ] There is no commented out code in this PR.
• [ ] The code has been formatted (make lint)
• [ ] Tests have been added to verify that the new code works.