How to install Gride 2.0 ?

In this section, you will use 2 machines. The first machine will be the system that will run the hub, while the other machine will run a node. For simplicity, let us call the machine where the hub runs as “Machine A” while the machine where the node runs will be “Machine B”. It is also important to note their IP addresses. Let us say that Machine A has an IP address of 192.168.1.3 while Machine B has an IP of 192.168.1.4.

Step 1

Download the Selenium Server by here.

 

Step 2

You can place the Selenium Server .jar file anywhere in your HardDrive.But for the purpose of this tutorial, place it on the C drive of both Machine A and Machine B. After doing this, you are now done installing Selenium Grid. The following steps will launch the hub and the node.

Step 3

·         * We are now going to launch a hub. Go to Machine A. Using the command prompt, navigate to the root of Machine A’s - C drive ,because that is the directory where we placed the Selenium Server.

·            * On the command prompt, type java –jar selenium-server-standalone-2.30.0.jar –role hub

·         * The hub should successfully be launched. Your command prompt should look similar to the image below

Step 4

Another way to verify whether the hub is running is by using a browser. Selenium Grid, by default, uses Machine A’s port 4444 for its web interface. Simply open up a browser and go to http://localhost:4444/grid/console

 

Also, you can check if Machine B can access the hub’s web interface by launching a browser there and going to http://iporhostnameofmachineA:4444/grid/console where “iporhostnameofmachineA” should be the IP address or the hostname of the machine where the hub is running. Since Machine A’s IP address is 192.168.1.3, then on the browser on Machine B you should type http://192.168.1.3:4444/grid/console

Step 5

·         Now that the hub is already set up, we are going to launch a node. Go to Machine B and launch a command prompt there.

·         Navigate to the root of Drive C and type the code below. We used the IP address 192.168.1.3 because that is where the hub is running. We also used port 5566 though you may choose any free port number you desire.

When you press Enter, your command prompt should be similar to the image below.

 

Step 6

Go to the Selenium Grid web interface and refresh the page. You should see something like this.

 

At this point, you have already configured a simple grid. You are now ready to run a test remotely on Machine B.

Designing Test Scripts That Can Run on the Grid

To design test scripts that will run on the grid, we need to use DesiredCapabilites and the RemoteWebDriver objects.

·         DesiredCapabilites is used to set the type of browser and OS that we will automate

·         RemoteWebDriver is used to set which node (or machine) that our test will run against.

To use the DesiredCapabilites object, you must first import this package

To use the RemoteWebDriver object, you must import these packages.

Using the DesiredCapabilites Object

Go to the Grid’s web interface and hover on an image of the browser that you want to automate. Take note of the platform and the browserName shown by the tooltip.

 

In this case, the platform is “XP” and the browserName is “firefox”.

We will use the platform and the browserName in our WebDriver as shown below (of course you need to import the necessary packages first).

Using the RemoteWebDriver Object

Import the necessary packages for RemoteWebDriver and then pass the DesiredCapabilities object that we created above as a parameter for the RemoteWebDriver object.

 

Running a Sample Test Case on the Grid

Below is a simple WebDriver TestNG code that you can create in Eclipse on Machine A. Once you run it, automation will be performed on Machine B.