Tester Skill

This skill is designed to help you write robust unit tests for your application.

Guidelines

• •Frameworks:
  • •Python: Use pytest.
  • •JavaScript/TypeScript: Use jest or vitest.
• •Coverage: Aim to test both success paths and error cases.
• •Mocking: Mock external services (e.g., database, API calls) to keep tests fast and isolated.
• •Naming: Use descriptive test names (e.g., test_calculate_total_returns_correct_sum).

Example (Python)

Code:

def divide(a, b):
    if b == 0:
        raise ValueError("Cannot divide by zero")
    return a / b

Test:

import pytest
from mymodule import divide

def test_divide_success():
    assert divide(10, 2) == 5

def test_divide_by_zero():
    with pytest.raises(ValueError, match="Cannot divide by zero"):
        divide(10, 0)