Mobile devices are getting more important than ever in our society. A large amount of Android and IOS applications are developed to make our lives convenient in every possible way.

Most mobile apps are usually running on the devices with various models and different platforms. The automated testing for these apps therefore shall be conducted in diverse circumstances. Testers certainly like to see the automated testing scripts running across devices and platforms without making many changes. One of the solutions for this is from Appium, a well-known automated testing tool for mobile applications.

We use selenium grid to run our tests on different browsers/operating systems in parallel to reduce the execution time. Now we will increase our environment to run tests on mobile browsers (Android/iOS) using Appium

A grid consists of a single hub, and one or more nodes (Desktop/Mobile), where hub receives all the test requests like browser, platform etc and redirects to node machines where tests will run. If you are new to grid concept, please understand Selenium Grid and configuring grid using json files.

If your list of devices/browsers/OS are more, then maintaining infrastructure to different combinations of mobile devices, browsers and Operating systems with different resolutions are very difficult.