juniorUnit Testing
What is a test case in unit testing?
Updated May 6, 2026
Short answer
A test case is a set of conditions to verify a specific behavior of code.
Deep explanation
A test case defines input, execution steps, and expected output. It ensures a specific functionality behaves correctly under defined conditions.
Real-world example
Testing password validation rules in a signup form.
Common mistakes
- Writing unclear or overly broad test cases.
Follow-up questions
- What makes a good test case?
- Can test cases depend on each other?