Laravel development: How to use Laravel Dusk for browser testing?

Laravel Development: How to use Laravel Dusk for browser testing?

With the continuous development of Internet technology, Web applications have become an indispensable part of our daily lives. At the same time, testing is becoming increasingly important. In web application development, browser testing is an essential part. The Laravel framework provides a tool called Dusk to help developers with browser testing. This article will introduce how to use Laravel Dusk for browser testing.

1. Install Dusk

First, we need to install Dusk in the Laravel project. Dusk can be installed by running the following command through Composer:

composer require --dev laravel/dusk

After installation, you need to run the following command to configure:

php artisan dusk:install

This will create a tests/Browser directory in the project root directory. It contains some default test files and examples.

2. Configuration

Before executing the test, some configuration is required.

First, you need to configure the APP_URL value in the .env file to be the URL of the test website. We usually run tests in a test environment, so it is recommended to configure APP_ENV to "local".

APP_URL=http://localhost:8000
APP_ENV=local

Next, you need to configure the test database connection. Laravel Dusk uses a dedicated database connection during testing, so this connection needs to be defined in the .env file. You can copy the original database connection configuration and name it "dusk". Note that the DB_DATABASE value here must be the same as the value in the .env.dusk.local file below.

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=my_test_database
DB_USERNAME=root
DB_PASSWORD=

Finally, we need to create a new file named .env.dusk.local and set APP_ENV to "dusk.local" in it to let Laravel know that we are running Dusk tests.

APP_ENV=dusk.local

3. Creating tests

Now that we have completed the basic configuration, we can start writing tests. Open the tests/Browser/ExampleTest.php file and we can see a simple test example. Create a new test file yourself, refer to the following format:

<?php

namespace TestsBrowser;

use TestsDuskTestCase;
use LaravelDuskBrowser;
use IlluminateFoundationTestingDatabaseMigrations;

class MyExampleTest extends DuskTestCase
{
    use DatabaseMigrations;

    public function test_example()
    {
        $this->browse(function (Browser $browser) {
            $browser->visit('/')
                ->assertSee('Laravel');
        });
    }
}

This test will open the homepage in the browser and search for "Laravel" in the webpage content. In the test method, we use the $this->browse() method to start the browser, which uses a closure that will accept a Browser instance as a parameter, which can be used to perform many different operations .

4. Run the test

After you have written the test, you can run the test using the following command:

php artisan dusk

Dusk will launch a Chrome browser window and Load the test website. It will then execute all tests and close the browser at the end of the tests. Test results will be output to the console.

If you only want to run a specific test file, you can use the following command:

php artisan dusk tests/Browser/MyExampleTest.php

If you want to keep the browser window while running the test, you can use the --debug option:

php artisan dusk --debug

In the browser, you can debug your tests and even change your test code in real-time to make debugging problems easier.

5. Conclusion

Laravel Dusk is a very useful tool that can help us perform browser testing easily. By following the steps described in this article, you can easily integrate browser testing into your Laravel application. Using Dusk for browser testing can better ensure the quality of the application, identify potential problems, and improve the reliability and performance of the application.

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