Test Doubles in Automated Testing

📰 Dev.to · João Godinho

Learn to use test doubles in automated testing to improve test reliability and speed

intermediate Published 19 Mar 2026
Action Steps
  1. Identify collaborators in your system that can be replaced with test doubles
  2. Choose a type of test double (mock, stub, fake, or spy) based on your testing needs
  3. Implement test doubles using a testing framework or library
  4. Configure test doubles to behave as expected in different test scenarios
  5. Run tests with test doubles to ensure correct system behavior
Who Needs to Know This

Developers and QA engineers benefit from test doubles as they enable faster and more reliable testing of complex systems

Key Insight

💡 Test doubles help isolate dependencies and make tests more efficient

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🚀 Improve test reliability and speed with test doubles! 🚀

Full Article

Introduction: Why do Test Doubles Matter? Real collaborators like databases and...
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