DongDuong2001 Unit Test Skill
This skill focuses on writing fast, isolated tests for individual units of code (functions, methods, classes).
When to use this skill
- When writing tests for utility functions, algorithms, or standalone classes.
- When using tools like Jest, pytest, JUnit, or xUnit.
- When needing to mock out dependencies (databases, APIs, file systems).
Guidelines
- Isolation: A unit test should not rely on an external database or network. Use mocks or stubs instead.
- Naming: Use clear, descriptive names (e.g.,
calculateTotal_withValidInput_returnsCorrectSum). - Structure: Use the Arrange-Act-Assert (AAA) pattern.
- Speed: Unit tests must be fast so developers can run them frequently.