Faion Testing Developer

Entry point: /faion-net — invoke this skill for automatic routing to the appropriate domain.

Testing Developer Skill

Testing strategies and implementation covering unit tests, integration tests, E2E tests, TDD workflow, and testing best practices.

Purpose

Handles all aspects of software testing including test design, implementation, mocking, fixtures, and testing frameworks.

Context Discovery

Auto-Investigation

Detect testing setup from project:

Read existing patterns:

• Check existing tests for patterns (AAA, fixtures)
• Read conftest.py for shared fixtures
• Check CI for test commands

Discovery Questions

Q1: Testing Goal

question: "What testing help do you need?"
header: "Goal"
multiSelect: false
options:
  - label: "Write tests for existing code"
    description: "Add test coverage"
  - label: "Set up testing framework"
    description: "Configure from scratch"
  - label: "TDD for new feature"
    description: "Write tests first"
  - label: "Fix flaky tests"
    description: "Stabilize test suite"
  - label: "Improve coverage"
    description: "Find and fill gaps"

Q2: Test Level

question: "What level of testing?"
header: "Level"
multiSelect: true
options:
  - label: "Unit tests"
    description: "Test individual functions/classes"
  - label: "Integration tests"
    description: "Test components together"
  - label: "E2E tests"
    description: "Test full user flows"
  - label: "API tests"
    description: "Test HTTP endpoints"

Routing:

• "Unit" → unit-testing, mocking-strategies
• "Integration" → integration-testing, test containers
• "E2E" → e2e-testing, Playwright/Cypress
• "API" → api-testing, contract testing

Q3: Test Framework (if not detected)

question: "Which test framework?"
header: "Framework"
multiSelect: false
options:
  - label: "pytest (Python)"
    description: "Python testing framework"
  - label: "Jest (JavaScript)"
    description: "JavaScript testing"
  - label: "Vitest (JavaScript)"
    description: "Fast Vite-native testing"
  - label: "Go testing"
    description: "Built-in Go testing"
  - label: "Playwright (E2E)"
    description: "Cross-browser E2E"

Q4: Mocking Needs

question: "What do you need to mock?"
header: "Mocking"
multiSelect: true
options:
  - label: "External APIs"
    description: "HTTP calls to third parties"
  - label: "Database"
    description: "DB queries and transactions"
  - label: "Time/dates"
    description: "Freeze time for tests"
  - label: "File system"
    description: "File operations"
  - label: "Nothing / minimal mocking"
    description: "Prefer real dependencies"

When to Use

• Unit testing strategies
• Integration testing
• End-to-end (E2E) testing
• Test-driven development (TDD)
• Mocking and stubbing
• Test fixtures and factories
• Security testing
• Code coverage analysis
• Language-specific testing (pytest, Jest, Go testing, etc.)

Methodologies

Tools by Language

Python: pytest, unittest, hypothesis, factory-boy, faker JavaScript: Jest, Vitest, Mocha, Chai, React Testing Library, Cypress, Playwright Go: testing stdlib, testify, gomock Java: JUnit 5, Mockito, AssertJ C#: xUnit, NUnit, Moq, FluentAssertions

E2E: Playwright, Cypress, Selenium, Puppeteer Security: OWASP ZAP, Burp Suite, Snyk, SonarQube

Related Sub-Skills

Integration

Invoked by parent skill faion-software-developer for testing-related work.

faion-testing-developer v1.0 | 12 methodologies