Can I simulate backend errors like 500 Internal Server Error?

Absolutely. The skill provides implementation patterns for simulating 4xx and 5xx errors, as well as network timeouts.

How does API mocking improve test stability?

By removing dependencies on external live APIs, you eliminate flakiness caused by network issues or changing backend data, resulting in faster and more reliable CI/CD pipelines.

Does this skill support Playwright specifically?

Yes, it includes specialized patterns for Playwright Route Mocking, utilizing route.fulfill() for flexible response control.

Does it include MSW (Mock Service Worker) support?

Yes, it features a complete MSW integration guide, templates for handlers, and a script to automatically generate mock handlers.

API Mocking & MSW Integration

Name: API Mocking & MSW Integration
Author: daishiman

bydaishiman

•

Seguridad y Pruebas

Simplifies end-to-end testing by simulating API responses, network delays, and error states using Playwright and MSW.

The API Mocking skill provides a comprehensive framework for isolating external dependencies during E2E testing. It leverages Playwright Route Mocking and Mock Service Worker (MSW) to create predictable test environments, enabling developers to simulate complex scenarios like server failures, slow network conditions, and dynamic data responses. By using standardized templates and automated handler generation scripts, it ensures that frontend tests remain stable, fast, and independent of backend availability.

Características Principales

01Conditional response logic based on request headers, URLs, and methods

02Comprehensive simulation of 4xx/5xx errors and network latency

03MSW (Mock Service Worker) integration with automated handler generation

04Support for external JSON fixtures to manage complex mock data sets

051 GitHub stars

06Playwright Route Mocking for intercepting and fulfilling network requests

Casos de Uso

01Isolating frontend tests from flaky or slow external API dependencies

02Testing UI behavior and error boundaries during specific server failure states

03Verifying application loading states and race conditions by simulating network delays

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add daishiman/aiworkfloworchestrator api-mocking

For use in Claude.ai and ChatGPT

Download Skill