Add propertylist test code and complete some missing part

[codecov-commenter]

Codecov Report

Attention: 17 lines in your changes are missing coverage. Please review.

Comparison is base (aefaa95) 13.05% compared to head (b6bf3e9) 16.62%.

Files	Patch %	Lines
...ataAndStorage/Internal/Property/PropertyList.swift	62.85%	13 Missing :warning:
...torage/Internal/Property/Unmanaged+Extension.swift	50.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #16 +/- ## ========================================== + Coverage 13.05% 16.62% +3.57% ========================================== Files 133 131 -2 Lines 2091 2051 -40 ========================================== + Hits 273 341 +68 + Misses 1818 1710 -108 ```

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