In-depth tutorials and comparisons for testing tools and frameworks — Playwright, Cypress, Selenium, Robot Framework, and more.
Test Automation
Unit tests run on your laptop in milliseconds. They catch logic bugs early and give you fast feedback. But they do not tell you whether your firmware drives the motor correctly, charges the battery without overcurrent, or handles a 3.0 V brownout without corrupting flash. For those questions, you
Test Automation
Test Chrome extensions at three levels: unit-test business logic with Jest + chrome-mock (no browser required), integration-test UI with Puppeteer by loading the unpacked extension, and end-to-end test user flows with HelpMeTest. Use sinon-chrome or jest-chrome to mock the chrome.* APIs in unit tests.
Testing
Electron E2E testing with Playwright tests the full application, but unit tests with Jest run in milliseconds and catch business logic bugs during development. The challenge is that Electron's main process and renderer both have APIs that don't exist in Node.js or jsdom test environments.
Test Automation
Integration tests that use mocked databases lie. They test your code's interaction with a mock, not with the actual database engine. When your ORM generates slightly wrong SQL, or when PostgreSQL's behavior differs from H2's, or when Redis's Lua scripting has a
Test Automation
PIT (Pitest) is the standard mutation testing tool for Java. It integrates with Maven and Gradle, runs mutations on your bytecode (faster than source-level mutation), and generates HTML reports showing exactly which mutations survived and where. Maven Setup Add the PIT plugin to pom.xml: <build> <
Tools & Frameworks
PHPUnit is the standard PHP testing framework. Pest is a modern alternative that wraps PHPUnit with a cleaner functional syntax. Both produce identical test results — the difference is entirely how you write tests. Pest is Laravel's default since v11. PHPUnit is the safe choice everywhere else. Key Takeaways
Integration Testing
Integration tests verify that PHP components work together: your service classes with a real database, your HTTP controllers with real routing, your external API clients against real or stubbed endpoints. This guide covers database integration testing with transactions, HTTP layer testing, testing with real queues and caches, and integrating with
Tools & Frameworks
Mockery is PHP's most powerful mocking library, popular in Laravel and Symfony ecosystems. It provides a fluent API for creating test doubles: mocks, stubs, spies, and partial mocks. This guide covers creating mocks, defining expectations with shouldReceive, argument matchers, mock verification, spies, and using Mockery with PHPUnit and
Tools & Frameworks
Pest is a modern PHP testing framework built on top of PHPUnit. It offers a simpler, more expressive syntax with test(), it(), and expect() — inspired by Jest and RSpec. Pest is Laravel's default testing framework since Laravel 11. This guide covers setup, writing tests, datasets, architecture testing, and
Tools & Frameworks
Laravel ships with a complete testing setup: PHPUnit configured, database factories, HTTP test helpers, and Artisan commands to generate tests. Feature tests let you make real HTTP requests to your application without a running server. This guide covers unit tests, feature tests, database testing, facade mocking, queue/event faking, and
Tools & Frameworks
PHPUnit is the standard testing framework for PHP. Every major PHP framework — Laravel, Symfony, WordPress — uses or supports PHPUnit. This guide covers installation, writing test classes, assertions, test doubles (mocks, stubs, spies), data providers, exception testing, code coverage, and CI integration. Key Takeaways PHPUnit test classes extend TestCase and methods
Integration Testing
Integration testing in .NET means testing your application with real dependencies — real HTTP routing, real database queries, real middleware. WebApplicationFactory from Microsoft.AspNetCore.Mvc.Testing spins up your actual ASP.NET Core app in memory, letting you send real HTTP requests without a running server. This guide covers setup, database