Testing in PHP: Frameworks and Tools for Quality Code

Testing in PHP: Frameworks and Tools

Quality testing is the foundation of a reliable web application. The PHP ecosystem has developed a powerful set of tools covering all levels: from unit tests to acceptance tests. In this article, we'll break down the main frameworks and libraries that will help you write clean, testable code.

1. PHPUnit — The De Facto Standard

PHPUnit remains the most popular framework for unit testing in PHP. It is included in Symfony, Laravel, and many other projects. Key features:

• Support for assertions — from simple assertEquals to complex assertJsonStructure.
• Fixtures for preparing and cleaning up data (setUp(), tearDown()).
• Report generation in HTML, XML, Clover formats.
• Integration with CI/CD (GitHub Actions, GitLab CI, Jenkins).

<?phpuse PHPUnit\\Framework\\TestCase;

class CalculatorTest extends TestCase{    public function testAddition()    {        $calc = new Calculator();        $this->assertEquals(4, $calc->add(2, 2));    }

    public function testDivisionByZero()    {        $this->expectException(\\DivisionByZeroError::class);        $calc = new Calculator();        $calc->divide(10, 0);    }}

2. Mockery — Flexible Stub Creation

Mockery extends PHPUnit's capabilities for creating mock objects. It is convenient when you need to replace a complex service or database.

• Support for partial mocks.
• Verification of method call order (shouldReceive).
• Working with magic methods (__call, __get).

<?phpuse Mockery as m;

class OrderProcessorTest extends TestCase{    public function testProcess()    {        $gateway = m::mock(PaymentGateway::class);        $gateway->shouldReceive('charge')                ->once()                ->with(100.0)                ->andReturn(true);

        $processor = new OrderProcessor($gateway);        $this->assertTrue($processor->process(100.0));    }

    protected function tearDown(): void    {        m::close();    }}

3. Codeception — All-in-One

Codeception combines unit, functional, and acceptance tests in a single syntax. It is especially popular in web projects where you need to test forms, AJAX requests, and databases.

• Modules for working with PHPBrowser, Selenium, Laravel, Symfony.
• Test generation via CLI: codecept generate:test.
• Support for BDD (Behavior-Driven Development) via Gherkin.

<?php// acceptance.suite.ymlactor: AcceptanceTestermodules:    enabled:        - WebDriver:            url: 'http://localhost'            browser: chrome        - Laravel5:            environment_file: .env.testing

// tests/acceptance/LoginCept.php$I = new AcceptanceTester($scenario);$I->wantTo('see that login form works');$I->amOnPage('/login');$I->fillField('email', 'user@example.com');$I->fillField('password', 'secret');$I->click('Login');$I->see('Dashboard');

4. Pest — Minimalist Syntax

Pest is a modern alternative to PHPUnit with a concise syntax, inspired by the JavaScript library Jest. It is ideal for those who value test readability.

• Automatic dependency resolution.
• Assertion chains: expect($result)->toBeTrue().
• Built-in support for parallel execution.

<?phpuse function Pest\\Faker\\faker;

test('it creates a user', function () {    $user = User::factory()->create([        'name' => faker()->name,        'email' => faker()->email,    ]);

    expect($u