Can this skill help with asynchronous code?

Yes, it includes specific patterns and best practices for testing async operations, delays, and promise resolutions within a Jest environment.

Does it support snapshot testing?

Yes, it includes implementation patterns for using Jest snapshots to verify consistent code formatting and UI output.

How does this skill improve my Jest tests?

It enforces industry best practices like Arrange-Act-Assert and provides domain-specific patterns for complex structures like ASTs and interpreters that standard documentation often lacks.

Is this skill only for language development?

While it features specific patterns for parsers and interpreters, the core principles of isolation, naming, and async strategies are applicable to any TypeScript project using Jest.

How do I configure Jest with this skill?

The skill provides a recommended jest.config.js setup optimized for ts-jest, including coverage collection and environment definitions.

Jest Testing Patterns

Name: Jest Testing Patterns
Author: mcclowes

bymcclowes

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セキュリティとテスト

Implements robust Jest testing suites with specialized patterns for language interpreters, parsers, and asynchronous operations.

概要

This skill provides a standardized framework for writing high-quality Jest tests within the context of language development and complex TypeScript applications. It guides Claude to follow the Arrange-Act-Assert pattern, ensuring test isolation and descriptive naming conventions while offering specialized implementation patterns for abstract syntax tree (AST) parsing, interpreter evaluation, and handling asynchronous code flows. It is particularly useful for developers building compilers, domain-specific languages (DSLs), or complex applications requiring precise validation logic.

主な機能

Provides specific patterns for validating language parsers and AST structures
Standardizes testing with the Arrange-Act-Assert structure for clarity
Offers implementation guides for testing interpreter evaluation and built-in functions
Streamlines asynchronous testing and promise resolution within test suites
3 GitHub stars
Includes configuration templates for ts-jest and environment setup

ユースケース

Migrating legacy test suites to modern TypeScript and Jest best practices
Building complex data processing pipelines with deep unit test coverage
Developing and validating a custom programming language or DSL interpreter

概要

主な機能

Provides specific patterns for validating language parsers and AST structures
Standardizes testing with the Arrange-Act-Assert structure for clarity
Offers implementation guides for testing interpreter evaluation and built-in functions
Streamlines asynchronous testing and promise resolution within test suites
3 GitHub stars
Includes configuration templates for ts-jest and environment setup

ユースケース

Migrating legacy test suites to modern TypeScript and Jest best practices
Building complex data processing pipelines with deep unit test coverage
Developing and validating a custom programming language or DSL interpreter