b4san/test-generator

Test Generation and Strategy

Overview

Use this skill to systematically test features by generating high-quality test cases based on specifications and architectural design.

Workflow

1. Analyze Requirements:

   • Understand the "Why" and "What" from specs and user stories.
   • Identify key scenarios, edge cases, and failure modes.

2. Define Test Strategy:

   • Unit Tests: Test individual functions/methods in isolation. Mock external dependencies.
   • Integration Tests: Test interactions between modules (e.g., API + Database).
   • End-to-End (E2E) Tests: Test complete user flows from frontend to backend.
   • Pyramid: Ideally follow the test pyramid (Many Unit > Some Integration > Few E2E).

3. Generate Test Code:

   • Write test cases before implementation if possible (TDD).
   • Use established testing frameworks (Jest, PyTest, Mocha, Cypress, Playwright).
   • Ensure descriptive test names: it("should return 404 when user not found").
   • Apply AAA pattern: Arrange, Act, Assert.

Quality Checklist

• Coverage: Do tests cover positive, negative, and edge cases?
• Isolation: Are unit tests independent and fast?
• Reliability: Are tests deterministic (no flaky tests)?
• Mocking: Are external services mocked appropriately?

Output

• Fully functional test files.
• Instructions on how to run tests.
• Suggestions for coverage improvements.