maximize ; driver. getId ; Selenium parallel testing. Regression Intelligence practical guide paralleo advanced users Part 3. The latest stable version is 3. He is a software test engineer, blogger, and open source contributor.

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TestNG How to do Parallel Testing - Selenium Parallel testing TestNG - Step by Step for Beginners

Selenium parallel testing -

For just two methods in the test case, there was a significant time difference in both the methods. Imagine the time it would save for us during practical test execution with a lot of test cases and multiple browsers. As I mentioned, we can also mention the value of the parallel attribute as " classes " to run the methods of different classes.

To demonstrate this, we will declare two classes as ChromeTest. java and FirefoxTest. java , which contains their respective tests. Note : The parallel attribute contains the value as " classes " since we are focusing on running the classes in parallel. Run the above TestNG suite and notice that two different threads will create during our parallel execution in TestNG.

It was how we run parallel classes in TestNG. In the next section, we will run parallel suites in TestNG. With the value of parallel parameter changed to " tests ", we can run all the tests that are available inside the suite parallelly.

But do remember to put appropriate thread-count value otherwise lesser threads creation would decrease the productivity. In the console, observe the thread count for the three methods. In this complete tutorial, we discussed how to run the test methods, classes, and suites parallelly in TestNG using selenium web driver.

It included mentioning the thread-count to tell TestNG how many threads we would like to create. But, in TestNG, we also get the liberty to run a single test method parallelly by configuring it inside the test code itself.

We do it by making a few changes in Test annotation. Observe the following code and the parameters used in Test annotation.

Run this test and notice the console. There are four different numbers because we mentioned the thread count as four in the Test annotation. This way, we can use the test method itself to run it parallelly in TestNG. Apart from running the tests parallelly through the XML file, we can also use dataproviders in TestNG to achieve the same goal.

It is an option for parallel execution of tests in TestNG. Before jumping onto the code, I recommend going through the concepts of DataProviders in TestNG so that everything is understood clearly.

Observe the following code, which uses a dataprovider called " dp " to return a number. Note : An extra parameter " parallel " is required to initiate parallel execution in TestNG using dataproviders.

In the XML file, we need to add one more parameter called data-provider-thread-count to mention the thread count we need to initialize. We can't use the standard thread-count parameter here as we did with the " parallel " parameter above.

Run the test suite using the XML file and see the thread ids. And there you go. The three threads have executed parallelly, giving us more efficiency and lesser time. Parallel execution in TestNG is beneficial in saving time and putting lesser efforts.

I know it was a long tutorial, but parallel testing in TestNG is used so heavily in the cross-browser testing domain that even if you don't like it, you definitely cannot ignore it. There are hundreds of browsers to be checked before making a website live and combining Selenium with TestNG for parallel execution.

It's just a great combination. Although parallel testing can apply in any type of testing, it ultimately comes down to the tester that he prefers. Sometimes, parallel execution in TestNG using Selenium does raise issues such as session handling or instance exceptions for the same drivers and fails our tests.

There are two ways in which parallel testing in TestNG can perform through parallel attribute and the TestNG Data Providers. Which one to use depends on the type of situation the tester is facing. As a special recommendation, keep practicing the parallel test execution in TestNG and keep exploring different angles of it.

Home TestNG TestNG Parallel Execution. Table of Contents. TestNG Tutorial. TestNG Parallel Execution Category: TestNG , October 29 Next Lesson. Share this post:. TestNG Data Provider with Excel.

TestNG Listeners. Author: Harish Rajora. I am a computer science engineer. I love to keep growing as the technological world grows. I feel there is no powerful tool than a computer to change the world in any way.

Apart from my field of study, I like reading books a lot and developing new stuff. TestNG Reporter Log. By Harish Rajora. How to use TestNG Reporter Log and How to print important messages and do logging in TestNG Reports with Selenium Examples. TestNG Interview Questions.

TestNG Vs JUnit. What are the Differences between TestNG vs JUnit testing framework. What are the TestNG features not present in JUnit framework? Implement IRetryAnalyzer to Retry Failed Test in TestNG Framework. By Virender Singh. Implement IRetryAnalyzer to Retry Failed Test in TestNG Framework How to Create a Custom Java Annotation.

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How to use TestNg retryAnalyzer to executed the failed test again. Learn about IInvokedMethodListener , IReporter, ISuiteListener and ITestListener. By Lakshay Sharma.

Decide which tests you will run in parallel. As noted below, some tests shouldn't or can't run in parallel, so you need to determine which tests are a good fit. Write the tests. Write code to automate each test to be run in parallel.

Schedule tests : Some test automation frameworks provide built-in schedulers that you can use for this purpose, or you could use an external scripting tool to trigger tests based on a schedule. Execute the tests. Let the tests run, being sure to monitor them to ensure that they all execute as required.

Examine test results. If any tests fail, determine why, and compare results from multiple tests to assess whether the issues that triggered the failure affect multiple configurations or are specific to one device, operating system, or browser.

You probably don't need any special tools to run tests in parallel. If you're already using automated testing, turning your automated tests into parallel tests does not require extensive work. The only variable is the framework and platform you're using--some support parallelization better than others, and some platforms aren't conducive to parallel testing.

Some platforms iOS simulator, for example only allow you to run a single parallel thread per computer, which would require multiple separate machines to be set up. This is why a cloud solution might be best--they set up the environment, and all you need to do is send over the tests!

As examples of tests that are good candidates to run in parallel, consider the following tests written for different frameworks.

This Selenium test is a good fit for test parallelization because it has no data dependencies and could be executed across multiple operating systems simultaneously:.

Here's a similar test you could run in Appium across multiple device types at the same time:. And in Playwright , here's a test that could run across different operating systems:.

While parallel testing can speed and optimize testing in many cases, it has its limitations. Parallel testing may not work for tests where the following challenges will create issues for efficient test execution:. Inter-dependent tests : If you have a test that requires another test to be complete before the test can run, you won't be able to run the tests in parallel.

This limitation applies most often in situations where you don't want to start one test if a previous test results in a failed state, in which case something is wrong and you want to avoid wasting time and resources running additional tests until you fix the issue that triggered the failure in the one test.

Data dependencies : If multiple tests require access to the same data, such as an entry in a database, running the tests in parallel can be difficult or impossible because each test will be trying to fetch or alter the same data at the same time.

Parallel tests should not have data dependencies. Infrastructure limitations : If your infrastructure is capable of supporting only a limited number of tests at one time, you'll have to limit test parallelization.

Attempting to run more simultaneous tests than your infrastructure can handle can result in tests that fail--probably inconsistently--due to a lack of available resources.

To make the most of parallel testing, adhere to these key principles:. Write atomic tests : Atomic tests are tests that evaluate one specific thing rather than trying to test many things at once. Managing parallel tests — and avoiding situations where tests compete for resources — is easier when each test is atomic.

Write autonomous tests : An autonomous test is a test that can run at any time without depending on other tests. Keep tests similar in length : To make the most of parallel testing, design each test so that it will take approximately the same amount of total time to run.

Otherwise, you could end up with a testing routine where most of your tests have finished, but you are still waiting on one of them, which is inefficient. Be strategic about which tests to run : Even with parallel testing, there are limits on how many tests you can run at once, so you'll need to be deliberate about what you test for and which configurations or environments you test on.

In other words, don't treat parallel testing as a license to run infinite tests. With support for all major browsers and thousands of individual devices , the Sauce DevOps Test Toolchain makes it easy to run parallel tests whenever and however you want. Take advantage of the Sauce Labs platform to access test infrastructure on demand, and take advantage of tools for monitoring tests and troubleshooting failures across any test within your test parallelization suite.

Back to Resources. Posted April 13, What is Parallel Testing? An Introduction to Parallel Testing. Running tests in parallel. Optimizing Sauce Connect Proxy. Shorten Test Run Time.

It would take 2 minutes. What Are the Advantages of Parallel Testing? How Does Parallel Testing Work? Parallel testing examples. Selenium parallel testing example. import org. public void testSelenium {.

com" ;. initElements driver, GoogleHomePage. class ;. searchFor "Selenium" ;. Appium parallel testing example. public void test throws MalformedURLException {.

setCapability "deviceName", "My Device" ;.

Parallel Test Execution in Selenium parallel testing with Srlenium allows Seleniuj multiple testinb methods or classes concurrently, leading to faster test execution. TestNG provides Seleniu for parallel execution Athlete meal planning with plant-based foods various levels, Selenium parallel testing the efficiency, test coverage, and scalability of Selenium automation projects. By leveraging parallel execution, testers can optimize resource utilization and obtain quicker feedback on test results. Parallel execution in Selenium runs many tests concurrently or in parallel in distinct thread processes. It allows you to run multiple tests concurrently on different browsers, devices, or environments instead of running them sequentially.

Selenium parallel testing -

The solution to the ephemeral socket problem is HTTP1. Firefox does not support keep-alive as of version 2. The means you can use the java client to scale out to remote boxes running selenium server and never have any problems on the central build server. You may need to solve socket problems on the remote boxes though.

That may simply never happen, although some combinations probably will. If you for technical reasons cannot adjust the port range on your Windows machine you will not be able to run more than firefox browsers.

Maven surefire supports run listeners for both JUnit and TestNG. Due to a shared file in the native events logic, the firefox driver should probably not be using native events when running concurrently.

Watch this issue. Want to support the Selenium project? Learn more or view the full list of sponsors. Documentation Legacy Selenium 2 Parallel Execution Legacy Code!

Parallel Testing Optimizes Continuous Integration and Delivery. Saves time and improves productivity. Better coverage of tests.

Can Radically Reduce Feedback Time. As per the setting provided to run the tests, it will start executing the tests in separate threads. The goal of parallel testing is to resolve the constraints of time by distributing tests across available resources. For example, if 20 test cases take a total of minutes to complete, then 10 parallel executions could run 2 test cases each and bring the total testing time down to 10 minutes.

Parallel testing accepts the following keywords values in TestNG:. Methods : This will run the parallel tests on all Test methods in TestNG. Classes : All the test cases present inside the classes that exist in the XML will run in parallel. Instances : This value will run all the test cases parallelly inside the same instance.

This example has three files created as a Maven Project. i ParallelScript. ii Pom. iii Testng. Note: We can use either if else block or switch case to select different browsers. In this file, we add all the necessary plugins and dependencies. Since we are using T estNG Parameters in ParallelScript.

java, we need to specify the values from the TestNG. XML file that will pass to the test case file. Here because the testing. In the testing. xml, to perform parallel testing. Note: To run the test, Right click on the testing.

xml, Select Run As, and Click TestNG. Below is the console output if we run the testing. If we check refresh the project on left panel, test-output folder is created.

You can find the index. html file. It shows the total run time of the tests. xml file. If you see the Results of running suite, the total time taken for parallel testing is ms whereas in normal testing,it is ms. When we run large volume of test cases, parallel execution reduces test execution time significantly.

To summarize, parallel testing has the following advantages:. Reduces Time : Running the tests in parallel reduces the overall execution time. Allow Multi-Threaded Tests : Using the parallel execution in TestNG, we can allow multiple threads to run simultaneously on the test case providing independence in the execution of different components of the software.

At the same time, parallel testing in TestNG also has some disadvantages as below:. Fails On Dependent Modules : Parallel testing allows independent running of modules simultaneously.

Due to this, we cannot go ahead with modules that are dependent on each other, and this occurs quite frequently while testing. So, either we run serially or remove dependence, which takes extra time and effort. Knowledge Of Program Flow : The tester should have good knowledge with the flow of the program to create parallel testing modules.

A slight interdependency can bring down the whole test case execution. The tester should also know which modules to run in multiple threads and which ones to run in the same threads etc.

Parallel testing in TestNG using Selenium helps us to deliver the projects at a faster rate in agile and continuous delivery working environment, which is challenging in its way.

Seelnium 17th State of Agile Seelenium Report is out now! Selenium parallel testing is an Selwnium test automation tool that Selenlum Selenium parallel testing quite Selenium parallel testing in testing circles in recent Fat burner for energy. We know that many of our testnig readers are familiar with a lot of these concepts. The tool is more popular because it supports all major programming languages such as JavaJavaScriptCRubyPythonor Perl. So, you can write code in your existing language and easily run it using Selenium. Moreover, it supports all major browsers such as ChromeEdgeOperaInternet ExplorerFirefoxand Safari. Parallel Selenium parallel testing is a testing technique in which multiple Sepenium are executed simultaneously in different gesting to Selenium parallel testing teating time. It allows Skin-firming remedies to execute multiple tests at the same time across different environments instead of running tests one by one or sequentially. Hence, it is also called parallel test execution in Selenium. xml file. Dependent methods will also run in separate threads in the order that we specified.