Monday 12 September 2016

How Selenium grid works

How Selenium grid works
·         HUB : Hub is a master machine which distributes your tests to registered slave machines (nodes).
·         NODE : Node is a slave machine which takes and executes the commands from the master machine (hub).


                      
Grid consists of Hub and nodes. Single hub and one or more nodes registered to the hub.

The hub receives a test to be executed along with information on which browser (Chrome, IE, Firefox safari etc )and ‘platform’ (i.e. WINDOWS, LINUX, etc) where the test should be run. It has the list of nodes registered under it, it selects an available node that has the requested browser-platform combination and initiates, Selenium commands (testcase) and passes them to the node selected. The node runs the browser, and executes the testcase within that browser against the application under test.

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