Add test cases to unit_test_text.cpp

[kyriesk]

Description

This PR adapts font-related tests from test_text.cpp (sktest) into comprehensive unit tests for unit_test_text.cpp (skunit_tests). Previously, font functionality testing was only available in the manual sktest suite. This change brings robust, automated unit test coverage for the font API, including:

• Font style manipulation (NORMAL_FONT, BOLD_FONT, ITALIC_FONT, UNDERLINE_FONT)
• Font size loading and verification
• Font retrieval and availability checking
• Multiple style transitions and edge cases

Fixes # (none - feature enhancement)

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

The new unit tests have been structured following the Catch2 framework conventions already in use by skunit_tests. Tests cover:

1. Font Style Tests: Verify that all font styles can be set and retrieved correctly

   • Testing individual style setting (BOLD_FONT, ITALIC_FONT, UNDERLINE_FONT)
   • Testing style cycling through all available styles
   • Testing style setting both by font reference and by font name

2. Font Size Tests: Verify font size preloading and availability checking

   • Confirming default size (64) is available
   • Preloading multiple sizes (12, 24, 36, 48, 99)
   • Verifying preloaded sizes are accessible
   • Testing both font reference and font name methods

3. Font Availability Tests: Verify font loading and retrieval

   • Checking non-existent fonts report as unavailable
   • Confirming loaded fonts can be checked by name and reference

Testing Checklist

• Tested with skunit_tests

All tests were run and verified to pass:

cd projects/cmake
cmake --preset Linux
cmake --build build/
cd ../../bin
./skunit_tests "[text]"

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have requested a review from ... on the Pull Request

[222448082Ashen]

General Information

• Type of Change: New feature (Unit Testing)

Code Quality

• Repository: Correct. The PR is targeted at splashkit-core.
• Readability: High. The code follows the established Catch2 pattern used throughout the repository. Sections are well-named and logic is easy to follow.
• Maintainability: High. The tests are modular and can be easily extended as new text features are added.

Functionality

• Correctness: The tests accurately verify the core functionality of the text module, including:
  • Font loading and retrieval (load_font, font_named).
  • Availability checks (has_font).
  • Font style manipulation (set_font_style, get_font_style).
  • Font size management (font_has_size, font_load_size).
• Impact on Existing Functionality: No impact on existing library functionality as these are strictly test additions.

Testing

• Test Coverage: This PR significantly improves test coverage for the text module.
• Test Results: Logic check confirms the tests are valid. (Note: Local execution in this environment was limited by missing graphics context, but the code adheres to successful patterns seen in unit_test_geometry.cpp and others).

Documentation

• Documentation: The code is self-documenting through clear test case and section naming.

Pull Request Details

• PR Description: The purpose of the PR (improving test coverage for text) is clear from the file content.
• Checklist Completion: All relevant items reviewed.

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