Choosing a Testing Orchestration Tool: A Loyalty-Discount Module Tested Across GitHub Actions, GitLab CI/CD, Jenkins, and CircleCI

Short summary

This article compares GitHub Actions, GitLab CI/CD, Jenkins, and CircleCI by implementing the same test suite across all four platforms using a real loyalty-discount calculator module. The author demonstrates 100% test coverage and equivalent pipeline configurations, showing that tool choice is an engineering decision, not marketing. Key insight: keep the orchestration layer thin and replaceable while ensuring test suites remain portable.

• •Compares four CI/CD platforms (GitHub Actions, GitLab CI/CD, Jenkins, CircleCI) using a real e-commerce test suite
• •All four platforms achieve 100% line, branch, and function coverage with equivalent pipeline configurations
• •Core principle: orchestration layer should be thin and replaceable; test suite should be portable across platforms

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