juniorUnit Testing
What is a fixture in testing?
Updated May 6, 2026
Short answer
A fixture is fixed test data used to run tests consistently.
Deep explanation
Fixtures provide predefined inputs and expected states to ensure repeatable tests.
Real-world example
Using mock user data in authentication tests.
Common mistakes
- Using live production data as fixtures.
Follow-up questions
- Where are fixtures stored?
- Are fixtures reusable?