Testing for Scheduler and Questionnaires

[karansoin]

Final Tests and Code Refinement - Scheduler & Questionnaires

♻️ Current situation & Problem

• Current code coverage for Questionnaires/Spezi Scheduler before this PR was at approx 55%
• Code was not fully commented and refined
• Unnecessary commented out code was still in certain code files

⚙️ Release Notes

• Added UI and Unit tests covering majority of Questionnaire/Scheduler files
• Cleaned up unnecessary commented out code and refined comments explaining code and logic

📚 Documentation

• Code and testing logic and documentation in the comments for the tests
• Used the updated XCTSpezi package
• Added tests to improve code coverage to over 75%

✅ Testing

• Code Coverage is now 86%+ after this PR
• Testing covers more than 75% of Scheduler and Questionnaires lines
• Covers both UI and Unit Testing

📝 Code of Conduct & Contributing Guidelines

By submitting creating this pull request, you agree to follow our Code of Conduct and Contributing Guidelines:

• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.21%. Comparing base (ef56301) to head (e8625ad).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   82.26%   86.21%   +3.96%     
==========================================
  Files          54       54              
  Lines        2987     2987              
==========================================
+ Hits         2457     2575     +118     
+ Misses        530      412     -118     

Files	Coverage Δ
PICS/Schedule/PICSScheduler.swift	100.00% <100.00%> (+19.24%)	⬆️

... and 6 files with indirect coverage changes

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[YurenSUN]

Looks great!