PHP Testing

When to Activate

• Writing PHP tests with PHPUnit or Pest
• Setting up Laravel/Symfony test suites
• Configuring PHPStan for static analysis
• Adding mutation testing with Infection
• Applying TDD layer by layer: domain value objects first, then application handlers, then infrastructure repositories, then HTTP controllers
• Verifying that test assertions are meaningful (not just coverage-padding) by running Infection mutation testing with an 80% MSI gate
• Choosing between PHPUnit data providers and Pest datasets to parameterize tests across multiple input variants

PHPUnit 11 — Unit Tests

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