testing: improve QueueTest

[alxkm]

Test Cases Added:
Circular Behavior & Index Wrapping:

• testCircularBehavior: Verifies correct wrap-around after multiple insert/remove cycles
• testQueueWraparoundIndexing: Ensures indexing wraps correctly within internal array
• testQueueStateAfterMultipleCycles: Validates consistent state across repeated fill/empty cycles

Functional Scenarios:

• testMixedInsertRemoveOperations: Tests interleaved insert/remove operations
• testSingleElementOperations: Confirms correct behavior with a single element
• testQueueConsistencyAfterOperations: Ensures queue maintains proper order after multiple mixed operations

Data Handling:

• testNullValueHandling: Tests support for null values (if allowed)
• testDifferentDataTypes: Validates generic type support for String and Double

Capacity-Based Tests:

• testLargerCapacityQueue: Tests queue with a larger capacity (10 elements)
• testQueueCapacityOne: Edge case with capacity of 1

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.86%. Comparing base (31bf130) to head (5fa410f).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6423   +/-   ##
=========================================
  Coverage     74.86%   74.86%           
  Complexity     5482     5482           
=========================================
  Files           682      682           
  Lines         19012    19012           
  Branches       3670     3670           
=========================================
  Hits          14233    14233           
  Misses         4224     4224           
  Partials        555      555           

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