**Course Title:** Mastering Laravel Framework: Building Scalable Modern Web Applications **Section Title:** Testing and Debugging in Laravel **Topic:** Introduction to Laravel’s testing tools (PHPUnit, Dusk) **Objective:** By the end of this topic, you will understand the basics of testing in Laravel and how to use PHPUnit and Dusk to write unit tests and browser tests for your Laravel application. **What is Testing in Laravel?** Testing is an essential part of any software development process. It ensures that your code is correct, stable, and performs as expected. Laravel makes it easy to write tests for your application using PHPUnit and Dusk, two popular testing tools. **PHPUnit** PHPUnit is a popular testing framework for PHP. It allows you to write unit tests for your application's code. In Laravel, PHPUnit is used to test the application's logic, models, controllers, and middleware. Laravel provides a `tests` directory where you can write your PHPUnit tests. The `tests` directory contains several subdirectories: * `Unit`: For unit tests * `Feature`: For feature tests * `Traits`: For testing traits **Writing Unit Tests with PHPUnit** To write a unit test with PHPUnit, follow these steps: 1. Create a new file in the `tests/Unit` directory. 2. Use the `TestCase` class provided by Laravel as the base class for your test. 3. Write a test method using the `test` keyword followed by the method name. 4. Use assertions to verify the expected behavior of your code. Example: ```php // tests/Unit/UserTest.php namespace Tests\Unit; use App\Models\User; use Tests\TestCase; class UserTest extends TestCase { /** * Test the user creation * * @return void */ public function testUserCreation() { $user = User::create([ 'name' => 'John Doe', 'email' => 'john.doe@example.com', 'password' => 'password' ]); $this->assertInstanceOf(User::class, $user); $this->assertEquals('John Doe', $user->name); $this->assertEquals('john.doe@example.com', $user->email); } } ``` **Dusk** Dusk is a browser testing framework for Laravel. It allows you to write browser tests for your application's UI. Dusk uses a Chrome driver to simulate user interactions with your application. You can install Dusk by running the following command: ```bash composer require --dev laravel/dusk ``` **Writing Browser Tests with Dusk** To write a browser test with Dusk, follow these steps: 1. Create a new file in the `tests/Browser` directory. 2. Use the `DuskTestCase` class provided by Dusk as the base class for your test. 3. Write a test method using the `test` keyword followed by the method name. 4. Use the `visit` method to visit a route in your application. 5. Use the `assertPathIs` method to verify the current URL. 6. Use the `assertSee` method to verify the presence of an element on the page. Example: ```php // tests/Browser/LoginTest.php namespace Tests\Browser; use Tests\DuskTestCase; class LoginTest extends DuskTestCase { /** * Test the login functionality * * @return void */ public function testLogin() { $this->visit('/login') ->type('email', 'john.doe@example.com') ->type('password', 'password') ->press('Login') ->assertPathIs('/home') ->assertSee('Welcome, John Doe!'); } } ``` **Conclusion** In this topic, we covered the basics of testing in Laravel using PHPUnit and Dusk. We wrote unit tests for a user model and browser tests for the login functionality. **Next Topic:** Writing unit tests for controllers, models, and middleware. **What to Expect in the Next Topic:** In the next topic, we will cover the following topics: * Writing unit tests for controllers * Writing unit tests for models * Writing unit tests for middleware * Using mock objects in unit tests **Leave a Comment/Ask for Help:** If you have any questions or need help with writing tests for your Laravel application, please leave a comment below. **External Links:** * [PHPUnit Documentation](https://phpunit.de/documentation.html) * [Dusk Documentation](https://laravel.com/docs/8.x/dusk) * [Laravel Testing Documentation](https://laravel.com/docs/8.x/testing)

// tests/Unit/UserTest.php

namespace Tests\Unit;

use App\Models\User;
use Tests\TestCase;

class UserTest extends TestCase
{
    /**
     * Test the user creation
     *
     * @return void
     */
    public function testUserCreation()
    {
        $user = User::create([
            'name' => 'John Doe',
            'email' => 'john.doe@example.com',
            'password' => 'password'
        ]);

        $this->assertInstanceOf(User::class, $user);
        $this->assertEquals('John Doe', $user->name);
        $this->assertEquals('john.doe@example.com', $user->email);
    }
}

composer require --dev laravel/dusk

// tests/Browser/LoginTest.php

namespace Tests\Browser;

use Tests\DuskTestCase;

class LoginTest extends DuskTestCase
{
    /**
     * Test the login functionality
     *
     * @return void
     */
    public function testLogin()
    {
        $this->visit('/login')
            ->type('email', 'john.doe@example.com')
            ->type('password', 'password')
            ->press('Login')
            ->assertPathIs('/home')
            ->assertSee('Welcome, John Doe!');
    }
}