PHPUnit Testing Basics

When to use

• The user wants a PHPUnit test to assert code throws an exception using expectException on PHP 8.1+.
• The user wants to run the same PHPUnit test body over multiple input rows via a data provider on PHP 8.1+.
• The user wants to build a fresh fixture before each PHPUnit test and tear it down afterward on PHP 8.1+.
• The user wants to write a test that extends TestCase and asserts behavior with PHPUnit on PHP 8.1+.

When NOT to use

• Do not use this skill for browser-driven or end-to-end UI testing that needs a headless browser harness.
• Do not use this skill when the project has standardized on Pest's function-style tests and expectation API.

Core guidance