Migrate JUnit 4 to 5 Jupiter

[gitar-bot-staging]

Modernize Test Suite with JUnit 5 and CI/CD Integration

Description

This PR comprehensively modernizes the test infrastructure by migrating to JUnit 5 and implementing modern testing best practices. The changes transform the existing test suite to use contemporary testing patterns while adding robust CI/CD pipeline support across multiple platforms.

Motivation

• Upgrade from legacy testing framework to JUnit 5 for better test organization and modern features
• Improve test maintainability through better structure and reduced code duplication
• Enable parallel test execution for faster build times
• Establish comprehensive CI/CD pipeline coverage for consistent testing across environments

Key Changes

Test Modernization

• JUnit 5 Migration: Added complete JUnit 5 test execution support with Apache Maven 3.9.4
• Test Organization: Implemented @Nested annotations for logical grouping of related tests
• Parameterized Testing: Replaced repetitive test methods with parameterized tests to reduce duplication
• Grouped Assertions: Adopted assertAll for better assertion grouping and clearer failure reporting
• Lambda Assertions: Updated assertion messages to use lambda expressions for improved performance

Infrastructure Improvements

• Parallel Execution: Configured parallel test execution with custom timing listeners
• Java Compatibility: Added version compatibility checking to ensure proper Java environment
• CI/CD Pipelines: Implemented comprehensive pipeline configurations for:
  • GitHub Actions workflow
  • GitLab CI pipeline
  • Jenkins pipeline

Testing Framework

• Maven Integration: Enhanced POM configuration with modern plugin versions and parallel execution settings
• Test Resources: Added JUnit Platform configuration for optimal test discovery and execution
• Performance Monitoring: Integrated timing listeners for test execution analysis

Impact

• 🚀 Faster Builds: Parallel test execution reduces overall test runtime
• 🏗️ Better Organization: Nested test classes provide clearer test structure and improved readability
• 🔄 Reduced Duplication: Parameterized tests eliminate repetitive test code
• 🛡️ Robust CI/CD: Multi-platform pipeline support ensures consistent testing across environments
• 🎯 Modern Standards: JUnit 5 adoption aligns with current Java testing best practices

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