How to use Mink with CakePHP?

CakePHP is a popular PHP web application framework that provides a simple and flexible way to develop web applications. However, sometimes we need a more advanced tool to test the user interface of a CakePHP application. Mink is a very useful tool in this situation. Mink is a PHP library that provides an extensible collection of drivers for testing web browsers.

This article will introduce how to use Mink in CakePHP so that we can better test our applications.

Step 1: Install Mink

First, we need to install Mink in our CakePHP application. For this we can use the Composer dependency manager. We can use the following command:

composer require behat/mink behat/mink-extension

This will install the Mink library and the Mink extension, we will be using the Mink extension in this tutorial.

Step 2: Define the Mink configuration file

Next, we need to define the Mink configuration file. We will create a new mink.php file in the CakePHP project and define the Mink configuration. Here is a sample configuration:

<?php
use BehatMinkSession;
use BehatMinkDriverSelenium2Driver;
use BehatMinkExtensionContextMinkContext;

// Bootstrap Mink for WebDriver and start an instance of a browser
// You can specify Chrome, Safari, Firefox, etc.
$driver = new Selenium2Driver('chrome');
$session = new Session($driver);
$session->start();

// Configure our MinkContext object with the appropriate data
$config = [
    'start_url' => 'http://localhost:8765', // The URL to start browsing at
    'default_session' => 'selenium2', // Use the Selenium 2 (WebDriver) driver
];

$mink = new MinkContext();
$mink->setSession('selenium2', $session);
$mink->setMinkParameters($config);

In the above example, we launched a Chrome instance using the Selenium 2 driver and defined the configuration parameters.

Step 3: Write Mink test cases

After completing the above configuration, we can write Mink test cases. We will create a new file .feature file in the tests/acceptance directory, which will contain our test cases.

Feature: Testing the Login Functionality

  Scenario: Login with Correct Credentials
    Given I am on "/login"
    When I fill in "username" with "testUser"
    And I fill in "password" with "pass123"
    And I press "Login"
    Then I should see "Welcome, testUser"

In the above test case, we used Gherkin language to define scenarios, steps and expected results. We can implement these steps using the methods provided in the MinkContext class.

Step 4: Run the Mink test

Once we have written the Mink test, we can run the test in the terminal using the following command:

vendor/bin/behat --config mink.php tests/acceptance/login.feature

This will launch the Chrome browser, Execute our test case and output the results to the terminal.

Conclusion

In this tutorial, we learned how to use Mink for web UI testing in a CakePHP application. We learned about the process of installing Mink, defining Mink configuration files, and writing test cases. With these steps, we can better test our CakePHP application and ensure its correctness and reliability.

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