BDD automated testing using PHP WebDriver and Behat

BDD (Behavior-Driven Development) is a software development method that emphasizes communication and collaborative work between the development team and business personnel and other stakeholders to achieve better software quality and adaptability. BDD automated testing uses automated testing tools in the BDD framework to execute and verify tests. In this article, we will discuss how to use PHP WebDriver and Behat for BDD automation testing.

1. Introduction to PHP WebDriver
   PHP WebDriver is a WebDriver client for the PHP language, used to interact with various WebDriver implementations (such as Selenium) to perform automation of various browsers and applications test. PHP WebDriver follows the W3C WebDriver protocol and provides a set of APIs to communicate with WebDriver.
2. Behat Introduction
   Behat is a behavior-driven development (BDD) framework that converts user requirements (scenarios written in natural language) into executable test cases and integrates with automated testing tools. Behat uses the Gherkin language as its scene description language, which is very easy to understand and write.

In Behat, we can use different extensions to integrate with automated testing tools to perform automated testing.

3. Integrating PHP WebDriver and Behat
   In this section, we will discuss how to integrate PHP WebDriver and Behat to perform automated testing in the BDD framework. First, we need to install the necessary software and libraries.

The following software and libraries must be installed:

• PHP 5.6 or higher
• Composer
• behat/behat
• behat/mink
• behat/mink-extension

Installation is as follows:

composer require behat/behat
composer require behat/mink
composer require behat/mink-extension

Once the necessary software and libraries are installed, we will Create a Behat configuration file. Run the following command in the command line:

php bin/behat --init

This will create a default Behat configuration file, we need to edit this file to use PHP WebDriver.

Open the default behart.yml file and replace it with the following content:

default:
  extensions:
    BehatMinkExtension:
      base_url: 'https://www.google.com'
      sessions:
        default:
          selenium2:
            wd_host: "http://localhost:4444/wd/hub"
            browser: "chrome"

In the above code, "base_url" is the base URL of the website to be tested, and "sessions" is Session configuration, "default" is the name of the Session. We use selenium2 as the default Session driver and the Chrome driver for PHP WebDriver.

Now that we have completed the integration of PHP WebDriver and Behat, we can use Behat to write test scenarios and use PHP WebDriver to perform automated tests.

4. Writing test scenarios
   In Behat, we use Gherkin language to write test scenarios. We will use a simple scenario to illustrate how to search for the word "Behat" in the Google search box.

Feature: Google Search
  Scenario: Searching for Behat
    Given I am on "/"
    When I fill in "q" with "Behat"
    And I press "Google Search"
    Then I should see "Behat"

In the above scenario, "Feature" is the title used to describe the feature and "Scenario" is the test scenario of the expected output when using the given input and operation. In this scenario, we search for the keyword "Behat" and make sure it exists in the search results page.

5. Execute the test
   Now that we have edited the Behat configuration file and test scenario, we can use the following command to execute the automated test:

php bin/behat

This will execute the tests and give you the result.

This will execute the tests and give you the result. Tests should be run automatically in Chrome browser using PHP WebDriver. If the test passes, you will see a message stating that the test passed.

6. Summary
   In this article, we discussed how to use PHP WebDriver and Behat for BDD automation testing. We use PHP WebDriver as Selenium client to write automated test scripts. We use Behat as the BDD framework and use Gherkin language to write test scenarios. Finally, we integrated PHP WebDriver and Behat to perform automated testing. If you want better software quality and adaptability, BDD automated testing is essential.

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