What Is Parallel Testing In Selenium
                     What Is Parallel Testing In Selenium?
As enterprises move away from manual testing and toward Selenium test automation, testing 
solutions have grown more scalable than ever. However, most businesses are still grappling 
with the scalability required to run several tests in parallel. Many companies still rely on 
sequential testing to provide quality assurance, which takes time, resources, and effort.
 Some people are hesitant to utilize Selenium for parallel testing. In contrast, others are unlikely 
to do so because their web application is small enough to fit within the current release windows. 
The main reason for the Selenium Grid's existence is to allow testers to test cases in parallel. 
Parallel testing is a semi-automated testing method that combines cloud and virtualization 
technologies to simultaneously conduct tests on many settings. The goal of this approach is to 
get around time and money constraints while yet maintaining excellent quality.
Parallel testing cuts down on execution time and effort, resulting in a shorter time to market. It's 
beneficial for cross-browser, compatibility, localisation, and internalization testing. For example, 
we can run two versions of the software simultaneously in a case where we have two versions 
of software accessible and need to check their stability and compatibility. Using a Selenium grid,
the main goal of running tests in parallel is to decrease the prevalent time and effort of 
automated browser testing while ensuring a high-quality product.
The parallel testing method can evaluate a single application or several platforms' components. 
Any programme or subcomponent, such as operating systems, browsers, or any combination, 
can be assessed on a different machine.
While parallel testing can apply to individual hardware units, it is more usually associated with 
using distinct virtual machines on the cloud. Whether your testing devices are physical or virtual,
parallel testing allows you to perform more tests than sequential testing allows. The parallel 
testing method can evaluate a single application or several platforms' components. Any 
programme or subcomponent, such as operating systems, browsers, or any combination, can 
be assessed on a different machine.
While parallel testing can apply to individual hardware units, it is more usually associated with 
using distinct virtual machines on the cloud. Whether your testing devices are physical or virtual,
parallel testing allows you to perform more tests than sequential testing allows.
Benefits of parallel testing in Selenium
Speed
 You don't require tens or hundreds of extra hours or more machines than you already have; all 
you need are the necessary test scripts.
Affordability
Building and maintaining an internal testing infrastructure is substantially more expensive than 
leasing test time on a cloud provider.
Compatibilities
 Due to the limitations of sequential testing, you can only test the most likely situations in most 
cases. You can try any combinations valuable to users with unlimited parallel testing.
Up-to-date
When you rely on cloud technology, you're putting yourself at a disadvantage. It is current and 
up to date. You'll always use the most recent versions of applications and software if you rely on
cloud technologies.
Results-driven
More scenarios may be tested in less time, resulting in more meaningful data for improvement.
Reduce testing time
Sequential testing provides extensive automated browser testing of a web application, but it 
takes longer. On the other hand, parallel testing can minimize total testing time by executing 
tests on numerous machines at the same time.
Wide range of tests
Parallel testing is a speedier method than sequential testing because it gives testers a more 
excellent range of test compatibility in a shorter period.
Optimize continuous integration and delivery
Functional tests must be run frequently and quickly to achieve continuous integration and 
delivery. Furthermore, running tests in parallel saves time and allows you to generate extensive 
test data reports.
Parallel testing is a logical extension that applies to all IT industries. Similar testing will likely 
drastically revolutionize testing by focusing on practicality, convenience, cost, speed, and scale, 
resulting in ongoing advancements in software development.
Uses of Parallel Testing
Parallel testing can be used for a variety of purposes. The following are some circumstances 
that might be the best fit:
1. Cross-browser testing
2. Compatibility testing
3. Evaluating different versions
4. Localization and internationalization are being tested.
5. Reviewing the language and confirming the context
6. Getting the job done
7. Configuring the environment for testing
When Should You Use Selenium Parallel Testing?
Now that you understand how Selenium parallel testing may help with continuous integration 
and delivery of applications, it's time to figure out when and how you should use it in your 
SDLC. For the following scenarios, parallel testing can be used:
● There is even a smidgeon of doubt about the functionality of new programmes, 
especially if the updated and previous versions of the software are nearly identical.
● When it comes to banking-related financial applications, most of them are identical. 
Parallel testing with Selenium can be used to verify the application's older and newer 
versions.
● When transferring legacy data from one system to another or when a corporation 
switches from one system to another. 
● When you require to test an app across many browsers, operating systems, and devices
using automated browser testing.
Conclusion
Selenium parallel testing is a great way to deploy online applications quickly without sacrificing 
quality, especially when it comes to automated cross-browser testing. You can reduce QA 
costs, run test cases with high accuracy, optimize continuous integration/delivery processes, 
and constantly improve test scripts by running Selenium test automation in parallel.