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

Laravel is a popular PHP development framework that provides a rich set of features and tools to simplify web application development. One of these features is Laravel Dusk. Laravel Dusk allows developers to write end-to-end browser tests to ensure application stability and reliability. In this article, we will take a deep dive into how to use Laravel Dusk for browser end-to-end testing.

1. Install Laravel Dusk

Before using Laravel Dusk, you need to ensure that the application has Laravel 5.4 and above installed. Second, use Composer to install Laravel Dusk.

First, open a terminal and move to the root directory of the application. Then run the following command:

composer require --dev laravel/dusk
php artisan dusk:install

The above command will download and install Laravel Dusk and then generate a sample test file.

2. Write the test

The generated example test file is in the path tests/Browser/ExampleTest.php. This file contains a page for testing the application. Opening this file we can see some basic test cases.

In this file, we can define tests that run in the browser. These test functions start with test. For example, in the example below, we have written a basic test case for the login page:

public function testLogin()
{
    $this->browse(function (Browser $browser) {
        $browser->visit('/login')
            ->type('email', 'email@example.com')
            ->type('password', 'password')
            ->press('Log in')
            ->assertPathIs('/')
            ->assertAuthenticated();
    });
}

This test case accesses the login page, enters email and password, and clicks the "Login" button. Finally, it asserts that the user is currently logged in and verifies that the application redirected correctly to the home page.

3. Run the test

Like other Laravel tests, you can run the Laravel Dusk test with the following command:

php artisan dusk

This will launch a Chromium browser and run it in it test. The test results will be displayed in the terminal.

4. Advanced Features

When writing test cases, Laravel Dusk provides many advanced features to ensure the accuracy and reliability of the test. For example:

• Simulate user interaction: Laravel Dusk provides a set of methods for simulating user interaction, such as click, type, scroll, etc. This way, testers can simulate all user interactions within the application to ensure the integrity and correctness of the system.
• Manipulate the browser: Laravel Dusk also provides some functions for operating the browser window, such as maximizing or minimizing the window, setting the window size or position, etc.
• Assertions: In addition to the assertions introduced in the examples above, Laravel Dusk provides many other assertion methods to verify that the application meets the expected results.
• Parallel testing: Laravel Dusk can run tests in multiple browser instances in parallel, thereby increasing testing speed. This is particularly useful when testing large applications.

Summary

Laravel Dusk is a powerful tool for ensuring the usability and correctness of applications on the browser side. By running browser end-to-end tests, potential bugs and vulnerabilities can be discovered and resolved, improving application stability and reliability. In this article, we looked at how to install and use Laravel Dusk, and how to take advantage of its powerful features to write complete browser automation tests.

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