Hello lovely coders! Today, I'll guide you through the steps for mastering mocking in PHP Unit Tests using Pest. Pest is a delightful PHP Testing Framework with a focus on simplicity. It was built with the aim of simplifying testing in PHP by using higher order messages and leveraging the existing PHP unit's functionalities. Let's dive in! 😄
Step 1: Setup your environment ðŸ›
If you don't have Pest installed, you can do this using Composer, a tool for dependency management in PHP. Run this command in your terminal:
composer require pestphp/pest --dev
Step 2: Mocking with Pest 🚀
One of the coolest features of Pest is the ability to write expressive mock expectations right in your test callbacks. Let's say we have a sendWelcomeEmail(User $user) function that sends a welcome email to a new user. We want to test whether it's working.
use App\Services\EmailService;
it('sends a welcome email to new users', function () {
// we create a mock instance of EmailService
$emailService = $this->createMock(EmailService::class);
// we expect the sendEmail method to be called once
$emailService->expects($this->once())
->method('sendEmail')
->with($this->equalTo('welcome.email'));
sendWelcomeEmail($emailService);
// assertion passed, no exceptions will be thrown
});
Look at that beautiful, clean code! 🌟 We're essentially telling the system, "We expect the 'sendEmail' method of the EmailService class to be called one time with 'welcome.email' parameter". Then, we call our sendWelcomeEmail function in the test.
Once all these conditions are met, the test would pass. This is a basic example, but Pest allows us to do much complicated mockings directly in the callbacks.
That's all for today, folks! I hope this step-by-step guide helped you in mastering mocking in PHP unit tests with Pest. Happy coding! 🚀
References 👇
Disclaimer: Please note that as technology keeps evolving, some links or details might become outdated. Always check the latest official documentation. 📚
