Although it is reasonably evident that parallel testing must be used with the test case methods to run them in parallel TestNG offers three more areas where we can go ahead with parallel testing, combining these four areas, parallel testing accepts the following keywords ( values) in TestNG: Where can we apply Parallel Test execution in TestNG?īefore starting with the code, let's answer a genuine question, " Where can we apply parallel testing in TestNG?". Before looking at the process of how to perform parallel execution of tests in TestNG using selenium webdriver, let's see what the different areas inside the code that we can parallelize in TestNG are. Parallel testing in TestNG using Selenium helps us to deliver the projects at a faster rate in this agile and continuous delivery working environment, which is challenging in its way. The tester should also know which modules to run in multiple threads and which ones to run in the same threads etc. A slight interdependency can bring down the whole test case execution. Knowledge Of Program Flow: The tester should be well-versed with the flow of the program to create parallel testing modules.So, either we run serially or dissolve independence, which takes extra time and effort. Due to this, we cannot go ahead with modules that are dependent on each other, and this occurs quite frequently while testing. Fails On Dependent Modules: Parallel testing allows independent running of modules simultaneously.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.Īs the two sides of the coin, parallel testing in TestNG also offers some disadvantages given as follows:.Reduces Time: Running the tests in parallel reduces the overall execution time.If we look at the bigger picture, parallel testing has the following advantages: If we have so many browsers with a different version, we can just create a browser matrix and run the tests parallelly, saving us a ton of resources such as time. Parallel testing is used heavily with Selenium because of the importance of cross-browser testing in the market today. Parallel execution would give us the correct idea of the stability and performance of the software much faster than running serially. As an example, you can think of having software with two different versions and running them in parallel with the help of TestNG. The operating system's functionalities do this, but as a user, we need to trigger parallel execution through TestNG. In parallel testing, the program's multiple parts ( or modules) execute together, saving the testers a lot of time and effort. Parallel testing or parallel execution, as the name suggests, is a process of running the test case parallelly rather than one after the other. What is Parallel Testing and Why is it important? Parallel test execution using DataProviders in TestNG.Configuring the test methods to run parallelly in TestNG.Running test Suites parallelly in TestNG using Selenium.Running test Classes parallelly in TestNG using Selenium.Performance comparison between serialized and parallelized test execution in TestNG.Running test methods parallelly in TestNG using Selenium.How to perform Parallel Execution in TestNG?.Where can we apply Parallel Test Execution in TestNG?.What is Parallel Testing, and why is it important?.With the same intentions of parallelizing things, we will introduce parallel test execution in TestNG using Selenium in this tutorial along with the following key topics: Imagine FIFO case where a job is executing with a batch time of ten ns and a small job of batch time one ns is just waiting for its turn. The unnecessary time it took to execute the jobs generated by CPU gave birth to the idea of " cores" in CPUs whose work would be to run the jobs in parallel. Serialization has been a pain for engineers for a long time which gave birth to the idea of TestNG Parallel Execution. If you are unaware or do not remember, I would recommend going through the tutorial as it will make a lot of sense to the existence of this topic later in the chapter. When the test suite executes, the browsers open in a serialized manner, i.e., one after the other. In the tutorial about performing cross-browser testing in TestNG using Selenium, there was a noticeable event.
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