Why use pure transition testing?

Pure transition testing is faster because it doesn't require creating an actor, is entirely synchronous, and allows for isolated logic verification.

How does it handle asynchronous state transitions?

It provides guidance on using waitFor and toPromise to reliably assert state changes that involve promises or delayed events.

Does it support XState v5 specific features?

Yes, it includes specialized patterns for XState v5, such as the pure transition() function and the .provide() method for mocking.

Can I use this with Vitest or Jest?

Absolutely. The skill provides implementation patterns and code snippets compatible with both Vitest and Jest testing frameworks.

What is the main philosophy of this XState testing skill?

It focuses on testing observable behavior—transitions and context changes—rather than the internal configuration structure, ensuring tests are resilient to refactoring.

XState Testing

Name: XState Testing
Author: IlyaGulya

byIlyaGulya

0•

安全与测试

Implements robust testing strategies for XState v5 state machines using Vitest and Jest.

This skill provides a comprehensive set of patterns and best practices for testing XState v5 state machines. It emphasizes behavioral testing over configuration checking, offering guidance on actor testing, pure transition testing for faster execution, and sophisticated mocking techniques using .provide(). Whether you are handling complex async operations with waitFor or verifying guarded transitions, this skill ensures your state logic is reliable, maintainable, and well-documented within your development workflow.

主要功能

01Fast, synchronous pure transition testing (v5.19+)

02Timers and delay testing with Vitest/Jest fake timers

03Behavior-driven testing patterns for XState v5 actors

04Advanced mocking for actions, actors, and guards with .provide()

05Async testing utilities including waitFor and toPromise

060 GitHub stars

使用场景

01Unit testing complex business logic encapsulated in state machines

02Mocking external API dependencies in stateful workflows

03Verifying edge cases and error paths in asynchronous state transitions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ilyagulya/claude-marketplace xstate-testing

For use in Claude.ai and ChatGPT

主要功能

01Fast, synchronous pure transition testing (v5.19+)

02Timers and delay testing with Vitest/Jest fake timers

03Behavior-driven testing patterns for XState v5 actors

04Advanced mocking for actions, actors, and guards with .provide()

05Async testing utilities including waitFor and toPromise

060 GitHub stars

使用场景

01Unit testing complex business logic encapsulated in state machines

02Mocking external API dependencies in stateful workflows

03Verifying edge cases and error paths in asynchronous state transitions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add ilyagulya/claude-marketplace xstate-testing

For use in Claude.ai and ChatGPT