Add tests for access tree

[arogachev]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

[what-the-diff]

PR Summary

• PHP Version Update Across Workflows:
  Multiple integral files including 'bc.yml', 'build.yml', 'composer-require-checker.yml', 'mutation.yml', 'rector.yml' and 'static.yml' in the workflows directory have seen a shift from PHP version 8.1 to version 8.3. This should enable better compatibility and leverage the improvements and features provided in the more advanced PHP version.

• Excluded PHP Version for Windows OS:
  In the build.yml file, PHP version 8.3 was added to the list of excluded versions for the windows-latest operating system. This ensures the system will not be trying to run a version of PHP that might cause conflicts or issues with this OS.

• Refined Error Handling in SimpleItemsStorage:
  In the important file src/SimpleItemsStorage.php, superfluous code was removed to streamline and reduce clutter. Furthermore, the method getAccessTree() has been improved to do a verification check if an item actually exists before throwing exceptions, reducing potential confusion and error throwing.

• Improved Testing:
  The testing suite file ItemsStorageTestTrait.php in tests/Common/ has been extended with new methods and functionalities to enhance the testing. The setUp() and tearDown() methods have been modified to freeze the clock at a specific timestamp for certain tests. This ability to control time makes the tests more reliable and less dependent on the actual time of test execution. In addition, a new test data provider method dataGetAccessTree() and a new test method testGetAccessTree() have been added, aiding in the thorough testing of the ItemsStorage class.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (18308ab) 99.81% compared to head (92fc987) 100.00%.

Additional details and impacted files

@@              Coverage Diff              @@
##             master      #241      +/-   ##
=============================================
+ Coverage     99.81%   100.00%   +0.18%     
  Complexity      216       216              
=============================================
  Files            13        13              
  Lines           539       539              
=============================================
+ Hits            538       539       +1     
+ Misses            1         0       -1     

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