add test cli

[barneydobson]

Description

Test cli

Fixes #182

Type of change

• Documentation (non-breaking change that adds or improves the documentation)
• New feature (non-breaking change which adds functionality)
• Optimization (non-breaking, back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (whatever its nature)

Key checklist

• All tests pass (eg. python -m pytest)
• The documentation builds and looks OK (eg. python -m sphinx -b html docs docs/build)
• Pre-commit hooks run successfully (eg. pre-commit run --all-files)

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added or an issue has been opened to tackle that in the future. (Indicate issue here: # (issue))

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.77%. Comparing base (b5779c1) to head (2cf15a2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #333      +/-   ##
==========================================
+ Coverage   86.91%   87.77%   +0.85%     
==========================================
  Files          22       22              
  Lines        2217     2217              
  Branches      280      280              
==========================================
+ Hits         1927     1946      +19     
+ Misses        214      194      -20     
- Partials       76       77       +1     

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[dalonsoa]

Looks good! Just a minor suggeestion.