Php testing

Skill ComeOnOliver/skillshub/skills/HoangNguyen0403/agent-skills-standard/php-testing

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Unit and integration testing standards for PHP applications. Use when writing PHPUnit unit tests or integration tests for PHP applications. (triggers: tests/**/*.php, phpunit.xml, phpunit, pest, mock, assert, tdd)

SKILL.md

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PHP Testing

Priority: P1 (HIGH)

Structure

tests/
├── Unit/
├── Integration/
└── Feature/

Implementation Guidelines

Standards: Use PHPUnit (9/10+) or Pest. Organize into Unit/, Integration/, and Feature/. Class names should extend TestCase (e.g., class OrderServiceTest extends TestCase).
TDD Workflow: Follow Red-Green-Refactor. Red: write failing test first for createOrder(), then Green: implement minimal logic to pass, then Refactor.
Mocking: Use createMock(PaymentService::class) for dependencies. Define behavior with expects($this->once()) and method('charge') with with(100)->willReturn(true). DO NOT mock simple Data Objects.
Fluent Assertions: assertSame checks type + value (===) — use assertSame('Test', $result->title) over assertEquals to avoid type coercion surprises. Also use assertCount() and assertMatchesRegularExpression().
Data Providers: Use #[DataProvider('statusProvider')] (PHPUnit 10+) with a public static function statusProvider(): array or dataset (Pest).
Isolation: Ensure tests are Independent and Repeatable. DB tests must use Transactions or SQLite :memory:.
Pest syntax: Use it('creates an order', function() { ... }) and expect($result->title)->toBe('Test') for cleaner, more readable tests.
Coverage: Aim for 80%+ line coverage. Use phpunit.xml to whitelist specific directories.
Automation: Run tests on every PR using GitHub Actions or GitLab CI.

Anti-Patterns

No testing private methods: Test through public interfaces only.
No over-mocking internals: Mock only external boundaries.
No real network/DB in unit tests: Use in-memory databases or mocks.
No coverage-metric chasing: Prioritize meaningful assertions.

References

Testing Patterns & Mocks

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