![]() ![]() The node then runs the browser and executes the Selenium commands within that browser against the application under test. When the node is selected Selenium commands initiated by the test are sent to the hub, which passes them to the node assigned to that test. But if the Hub doesn't find the node with any such configuration, it returns the error. According to the configuration of the nodes, hub selects the available node that has the requested browser, version, and platform. ![]() Nodes (Other Machines) are registered to the hub. Hub (Single machine) receives the test to be run along with the information such as the browser, its version, platform on which the test should be executed. Test runs on single machine called Hub and the execution will be done on various machines (may be virtual machines) called nodes. Selenium Grid consists of hub and multiple nodes. There is no need to install Apache Ant unlike Grid 1. Selenium 2 is bundled with Selenium Server jar file. Old Grid 1 is obsolete now, hence Grid 2 is used. Selenium Grid has 2 versions- older Grid 1 and older Grid 2. ![]() It also allows running test cases on multiple browsers in parallel. The facility to run multiple tests on multiple machines, on multiple browsers simultaneously is made possible by Selenium Grid. Among the four flavors of Selenium, Selenium Grid is one such flavor. ![]()
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