testing-phpunit

What problem does it solve?

This Skill removes the guesswork from writing isolated Magento 2 unit tests by showing how to test real classes with mocked dependencies, precise assertions, and clear exception handling.

Core Features & Use Cases

• Behavior-focused unit testing: Covers service logic, return values, state changes, and collaborator side effects without full framework bootstrap.
• Mocking and setup patterns: Explains how to build subjects in setUp, configure direct constructor dependencies, and avoid over-mocking.
• Data-driven coverage: Uses data providers to validate repeated input and output combinations, including edge cases and invalid inputs.
• Exception verification: Demonstrates how to assert Magento and PHP exceptions with expected messages.
• Use case: A Magento developer can quickly create or update Test/Unit classes for a model or service and verify logic before shipping a module change.

Quick Start

Ask the skill to write or update a Magento 2 PHPUnit unit test for a specific class, its dependencies, and the behaviors or exceptions you want covered.