How does it mock complex database clients like Prisma?

It utilizes a 'mockDeep' approach with vitest-mock-extended to handle Prisma's nested fluent API and transaction logic effectively.

What is the core principle of this testing strategy?

The core principle is that testability drives design. It uses the 'fn(args, deps)' pattern to make functions easily testable without needing complex module interception.

How does this skill handle database safety during testing?

It includes vitest.setup.ts configurations that act as guardrails, throwing errors if integration tests attempt to run against any database URL that isn't localhost or 127.0.0.1.

Does this support load testing?

Yes, it provides specific patterns for k6 scripts, including smoke tests for validation and stress tests to find the breaking point of your application.

What is the recommended file naming convention?

Unit tests use *.test.ts, integration tests use *.test.int.ts, load tests are kept in the load/ directory as .js files, and chaos tests in the chaos/ directory.

Testing Strategy & Implementation

Name: Testing Strategy & Implementation
Author: jagreehal

byjagreehal

0•

Security & Testing

Implements a robust test pyramid using dependency injection, Vitest, and k6 to ensure application reliability and performance.

This skill provides a standardized framework for building highly testable TypeScript applications by prioritizing the 'fn(args, deps)' pattern over complex class-based architectures. It establishes a clear test pyramid consisting of unit tests with typed mocks, integration tests with real local databases, and performance-focused load tests using k6. By enforcing strict database guardrails, realistic data generation with Faker, and specialized Prisma mocking, it creates a safe and scalable environment for developers to maintain high code quality and prevent regressions.

Key Features

01Realistic test data generation with Faker stubs and factories

02Functional Dependency Injection (DI) pattern for easy unit testing

03Comprehensive load and stress testing scripts using k6

04Automated database guardrails to prevent non-local data loss

05Deep Prisma mocking and vitest-mock-extended integration

060 GitHub stars

Use Cases

01Architecting new TypeScript services with a test-driven design from day one

02Implementing integration tests that safely interact with real local databases

03Validating API scalability and response thresholds under heavy load

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jagreehal/jagreehal-claude-skills testing-strategy

For use in Claude.ai and ChatGPT

Download Skill