How does it handle database mocking?

It suggests best practices for using in-memory adapters, test doubles, or test containers to keep tests isolated and fast.

Does it follow the NestJS testing pyramid?

Yes, the skill encourages a balanced approach covering unit, integration, and end-to-end tests for maximum coverage and efficiency.

Can it help with flaky tests?

Absolutely. It includes debugging strategies for non-deterministic tests and advice on resetting mocks correctly between test cases.

Is it compatible with other testing frameworks?

While optimized for Jest (the NestJS default), the patterns for TestModule configuration are generally applicable to most JavaScript testing environments.

Does this skill support e2e testing for NestJS?

Yes, it provides specialized patterns for e2e testing using Supertest to validate HTTP-level interactions and API responses.

NestJS Testing Expert

Name: NestJS Testing Expert
Author: shipshitdev

byshipshitdev

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Seguridad y Pruebas

Builds reliable, production-grade Jest test suites for NestJS modules, services, and controllers.

This skill transforms Claude into a specialized NestJS quality assurance engineer, providing expert guidance on architecting robust testing strategies using the Jest framework. It assists developers in implementing the full testing pyramid—ranging from isolated unit tests and integration tests with mocked providers to comprehensive end-to-end HTTP API testing using Supertest—ensuring code reliability and preventing regressions through industry best practices like deterministic testing, proper module configuration, and efficient database mocking.

Características Principales

0110 GitHub stars

02Automated TestModule configuration and provider mocking

03Integration of in-memory database adapters and test containers

04Implementation of unit, integration, and e2e testing patterns

05Standardized Arrange-Act-Assert structures for test readability

06Debugging and resolving flaky or non-deterministic test suites

Casos de Uso

01Setting up e2e tests for REST or GraphQL APIs using Supertest

02Refactoring legacy NestJS tests to improve reliability and execution speed

03Writing comprehensive unit tests for complex NestJS business logic services

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add shipshitdev/library nestjs-testing-expert

For use in Claude.ai and ChatGPT

Download Skill