Mock API vs Real API: When to Use Each in Your Development Workflow

The article provides an excellent overview of when and why developers should use mock APIs versus real APIs during software development. Here are the key takeaways:

1. Mock APIs:

   • Use them when the actual API doesn't exist yet.
   • Ideal for unit testing, component testing, and simulating specific error codes or slow responses.
   • Useful in CI/CD pipelines to ensure reliability and speed up builds.
   • Great for working with rate-limited or paid third-party APIs without hitting limits.
   • Helpful when building demos or prototypes.

2. Real APIs:

   • Use them during integration testing, end-to-end testing, performance testing, and load testing.
   • Necessary for testing authentication and authorization mechanisms.
   • Essential for debugging production issues and ensuring that business logic and data transformations work correctly in the real environment.

3. Layered Testing Strategy:

   • Unit tests should use mock APIs to validate response handling, UI rendering, and error states.
   • Integration tests should run against a staging environment with real APIs to ensure end-to-end data flow and business logic correctness.
   • End-to-end (E2E) or smoke tests can be performed on production mock endpoints to verify API client code

Read the full article at DEV Community

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