Guide unit, integration, and E2E testing patterns and best practices.
npx skills add https://github.com/wpank/ai --skill testing-patterns-wpank
Please help me install this Agent Skill. Skill: testing-patterns Source: https://github.com/wpank/ai/tree/main/skills/testing/testing-patterns Command: npx skills add https://github.com/wpank/ai --skill testing-patterns-wpank
This Skill helps you write effective tests that catch bugs, improve code quality, and provide confidence in your software. It addresses the challenges of creating reliable, maintainable, and fast test suites.
Use the testing-patterns skill to generate a unit test for the provided function using the Arrange-Act-Assert pattern.
High-intent search queries and answers about installing and using this skill.
Unit testing validates individual functions in isolation, integration testing verifies interactions between modules or APIs, and E2E testing evaluates complete user flows. The testing pyramid guides how to balance these levels for a reliable suite.
To write a unit test using Arrange-Act-Assert, first set up your required data and dependencies, then execute the function being tested, and finally assert that the output matches your expected results.
Use stubs to provide predefined return values, mocks to verify specific interactions between objects, and spies to record method calls while still executing the original implementation. Mocking at boundaries rather than implementations creates more reliable tests.
The best way to test database and API integrations is to apply dedicated integration testing strategies that verify data persistence and external endpoints, ensuring your integration tests interact with real boundaries rather than heavily mocked implementations.
To make your test suite catch more bugs, implement a mix of unit, integration, and E2E tests using patterns like Given-When-Then and parameterized tests. Applying test quality checklists ensures your tests remain effective and maintainable.
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