Regression Testing with Selenium: Tutorial

Regression prove ensures thatnew code changes don ’ t break existing functionality. With Selenium, testers can automate declamatory fixation suites, saving time and effort while improve coverage.

This article covers the grandness of regression examination, the benefit of using Selenium for automating it, best practices for preserve Selenium regression suite, and step-by-step guidance on performing fixation testing with Selenium in CI/CD environments.

Why Regression Testing?

Let ’ s see through an instance of why regression testing plays an important function in the testing process.

Consider an airline reserve application that has inclose a new payment method through a credit card. This functionality has been developed and tested by the developer and testers and bugs have been raised in case of any variance. The bugs have been mend and the functionality is deployed, tested, and has gone live. After a few day, the airline engagement system need to add new functionality that allows exploiter payment through debit cards. Let ’ s say this new functionality has likewise been deployed and tested successfully.

At this point, the role of regression testing arrive into the icon. What will pass if you don ’ t perform fixation testing to assure whether the existing credit card payment functionality is act fine after the new debit card payment method has been bring? There might be luck that the new payment method has separate the existing recognition defrayal codification or any other functionality. Hence fixation testing plays a vital office as it ascertain the overall application behaviour after any new codification has be introduced or a bug fix has been implement.

Here, the compass of regression test besides play an significant purpose. The quiz team has to decide what components/features of the application need to be considered for fixation testing.

The scope of regression prove depends on various factors like the complexity of the code, the feature to be test and the priority of the features to be tested. Testing teams likewise need to consider whether both and need to be include in the scope of fixation testing.

SUSA automates exploratory testing with persona-driven behavior, catching bugs that scripted automation misses.

Regression Testing with Selenium

is a web-based mechanization try framework. It aid in automating functional and regression examination case that reduce the manual testing effort. Usually, regression suites include a huge number of examination cases and it takes time and travail to fulfil them manually every time when a code change has been introduce. Hence almost every organization look after automating regression test example to cut the time and endeavor. Choosing the correct automation framework/ creature completely depends upon the application, technology used, testing requirements, and skill set ask for performing automation testing.

There are four components in Selenium & # 8211;,,, and. Each of these is used for different examination purposes. Selenium Webdriver provides an interface that helps us develop automation hand that interact with the browser and perform. Various browsers like Chrome, Edge, Firefox, IE, and Opera are supported by Selenium. Selenium also supports multiple programming languages like,,, Ruby, etc.

Let ’ s see some best practices that should be considered for regression testing.

• Defining Test Strategy: The test scheme defined may include the trial lawsuit to be considered for regression, estimates for test execution enhancements need to the exist test cases, and the new test cases if required.
• Maintaining/updating Regression retinue:Testing teams hold to regularly maintain the regression suites to check for any new failure, trial book sweetening required, etc.
• Test Automation: is a best practice to preserve the clip and efforts required to execute regression tests manually every clip during a freeing. There are multiple coming for automating test suit like the one mentioned above apply Selenium. Selenium can be used along with the,,,, etc.

How to Perform Regression Testing Using Selenium?

Automation all reckon on the framework that you take to germinate, and there is no such tool dedicated to perform only fixation screen. The automation model you choose should be designed such that it supports fixation screen effectively.

You can develop the fixation suite for mechanization and maintain impart new test scripts/test cases as and when expect. Selenium Framework contains many recyclable modules/functions that make it easygoing to maintain the live code or add any new codification.

You can mix Selenium with frameworks like TestNG, Junit Maven, etc. help in publish automation scripts effectively. You can likewise use the design pattern while build an automation framework.

The page object framework is a designing form that makes it leisurely to maintain codification, cut complexity, and increase codification reusability. In POM there is a freestanding class for each application web page. In these page classes, there are page objects and corresponding methods that implement these page objects while interacting with the browser.

Also, there are separate Test classes in which you can indite your test cases using TestNG or Junit. You can also add assertions and verifications in your Test classes. The fact that verifications are separated from our page operations in page classes create POM easy to understand and simplified.

Let ’ s see the below framework structure using POM:

In the above structure, there are two Page classes & # 8211;HomePage and LoginPage. Similarly, there are two corresponding test classes & # 8211;HomePageTestandLoginPageTest.

Let us see an example of how these page and test classes are defined for LoginPage using TestNG.

LoginPage class

package com.qa.browserstack.pages; import java.time.Duration; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import com.qa.browserstack.base.BasePage; public class LoginPage extends BasePage {WebDriver driver; By emailID = By.id (`` user_email_login ''); By password = By.id (`` user_password ''); By SignIn = By.cssSelector (`` li.sign-in-link & gt; a ''); By Login = By.id (`` user_submit ''); By checkBox = By.id (`` tnc_checkbox ''); public LoginPage (WebDriver driver) {this.driver = driver;} public String getLoginPageTitle () {return driver.getTitle ();} public null doLogin (String username, String pwd) {driver.findElement (SignIn) .click (); driver.findElement (emailID) .sendKeys (username); driver.findElement (password) .sendKeys (pwd); driver.manage () .timeouts () .implicitlyWait (Duration.ofSeconds (20)); driver.findElement (Login) .click ();} public Boolean signInLinkIsDisplayed () {boolean signIn; signIn = driver.findElement (SignIn) .isDisplayed (); return signIn;}}

In this Page class, page aim like emailID, password, signIn are designed foremost and then there are fit method like getLoginPageTitle, doLogin, signInLinkIsDisplayed that implement these page object to interact with the browser.

LoginPageTest stratum

package com.qa.browserstack.tests; import com.qa.browserstack.base.BasePage; import com.qa.browserstack.pages.LoginPage; import static org.testng.Assert.assertEquals; import java.net.MalformedURLException; import java.net.URL; import java.util.Properties; import org.openqa.selenium.By; signification org.openqa.selenium.Platform; importee org.openqa.selenium.WebDriver; significance org.openqa.selenium.remote.DesiredCapabilities; import org.openqa.selenium.remote.RemoteWebDriver; import org.testng.Assert; import org.testng.annotations.AfterMethod; import org.testng.annotations.AfterTest; import org.testng.annotations.BeforeMethod; import org.testng.annotations.BeforeTest; import org.testng.annotations.Test; signification com.qa.browserstack.util.Constants; public category LoginPageTest {BasePage basePage; Properties shore; WebDriver driver; LoginPage loginPg; @ BeforeTest public void apparatus () throws Exception {basePage = new BasePage (); prop = basePage.init_properties (); driver = basePage.init_driver (prop); loginPg = new LoginPage (driver);} @ Test (priority = 3) public void LoginTest () throws Exception {loginPg.doLogin (prop.getProperty (`` username ''), prop.getProperty (`` countersign ''));} @ Test (priority = 2) public void LoginPageTitleTest () {String title = loginPg.getLoginPageTitle (); System.out.println (title); Assert.assertEquals (title, Constants.LOGIN_PAGE_TITLE);} @ Test (priority = 1) public void SignupLinkTest () {Assert.assertTrue (loginPg.signInLinkIsDisplayed ());} @ AfterTest public nihility tearDown () {driver.quit ();}}

The above test cases are written expend TestNG. Through these test cases, you can call the page class method like doLogin, getLoginPageTitle, etc. You can also maintain the data in the properties file as shown below.

config.properties

Properties file plays a crucial character within the automation framework and help to implement regression examine effectively. The property register consists of key and value pairs which we require while action our main automation test scripts. This way, you just have to update the value of any key if required, and no major codification alteration is ask.

You can use BrowserStack to run regression tests using Selenium. BrowserStack allow you to seamlessly quiz your mobile apps and web covering on 3000+ different devices, browsers, and OS versions.

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