Add Tests to HealthKit Visualizations

[YurenSUN]

Add Tests to HealthKit Visualizations

♻️ Current situation & Problem

Currently, we are missing test coverages for HealthKit visualizations, especially for the codes requiring access to the HealthKit data. This PR aims to cover those codes by (1) grouping codes parsing the HealthKit data as single functions to be tested with unit tests, and (2) using mock data for testing. Currently, we are still missing code coverage for reading HKStatistics as we are not able to manually initialize this class, and some auxiliary codes such as setting the states with parsed HealthKit, but the majority of the codes are covered. Overall, 402 out of 472 (~85%) lines for HealthKit visualization are now covered.

⚙️ Release Notes

• Refactor part of the codes to group codes parsing the HealthKit data as single functions
• Add unit tests for functions that parse the HKQuantity(s)
• Add a feature flag --mockTestData to define whether we need to use the mock data for testing
• Update the UI test to use the mock test data
• Add codes to tap on screens to trigger and verify lollipops and details showings for the visualizations during UI tests.

📚 Documentation

Related comments are added.

✅ Testing

Unit tests and UI tests are added.

📝 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

Attention: Patch coverage is 68.67470% with 26 lines in your changes are missing coverage. Please review.

Project coverage is 36.38%. Comparing base (380ea88) to head (4b96083).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #49      +/-   ##
==========================================
+ Coverage   31.20%   36.38%   +5.18%     
==========================================
  Files          54       54              
  Lines        2930     2961      +31     
==========================================
+ Hits          914     1077     +163     
+ Misses       2016     1884     -132     

Files	Coverage Δ
PICS/HealthVisulization/HKVisualizationItem.swift	96.38% <100.00%> (+56.78%)	⬆️
PICS/HealthVisulization/HKVisualization.swift	77.42% <68.30%> (+11.44%)	⬆️

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[akanshyabhat]

Looks good, thank you for adding tests!