How to work with Selenium Grid and Cloud Solutions

1Confidential and propriety Galil Software, Ltd. 20128-Jul-15
Author :
Amir Najjar – Automation Development Lead.
Selenium Grid + Cloud Based Solutions

2Confidential and propriety Galil Software, Ltd. 201219.8.12
Selenium Grid
- What is Selenium Grid?
- Tool for distributing tests across multiple physical or virtual
machines simultaneously.
- Dramatically accelerates the testing process and returns a
quick feedback.
- The code doesn’t need to be present on the machines which
run the tests.

Distribute Tests across Machines:
There are 2 ways to distribute tests across multiple machines:
1) Use Selenium Grid
2) Distribute them by making relevant configurations using a CI system (TeamCity)

So how Does Selenium Grid Work? Hub and Node:
- Hub - central point where the tests would be triggered. A
Selenium Grid has only one Hub and it is launched on a
single machine once.
- Node - Nodes are the Selenium instances that are
attached to the Hub which execute the tests. There can
be one or more nodes in a grid which can be of any OS
and can contain any of the Selenium supported
browsers.

Run Selenium
Tests on
Run Selenium
Tests on
Run Selenium
Tests on
Selenium Grid
HUB (Server)
Distribute Tests to nodes

Working with the grid – 5 steps:
* Configuring the Hub
java –jar sel-server-standalone.jar –port 4444 –role hub –nodeTimeout 1000
* Configuring the Nodes
(server-standalone) java -jar D:JARselenium-server-standalone-2.42.2.jar -role
node -hub http://192.33.172.157:4444/grid/register -browser browserName=firefox -port 5555
* Develop the Script and Prepare the XML File
* Test Execution
* Result Analysis

Configuring the hub:
• After downloading the selenium server standalone, start
the hub using the following command:
java -jar selenium-server-standalone-2.45.0.jar -port 4444 -role hub -nodeTimeout 1000
Now navigate to: http//localhost:4444
You will see that you have access to the hub, and you will also see that you still don’t have
any configured nodes yet.

Configuring the nodes:
• Log on to the machine you would like to execute your tests
on, download the selenium server standalone jar and invoke
the following command:
java -jar C:Seleniumselenium-server-standalone-2.45.0.jar -role node -hub
http://192.168.173.100:4444/grid/register -browser browserName=firefox -port 5559
• Path to the server standalone jar
• IP address of the hub
• The port of the hub
• The browser type you want to run on
• The port of the node you want to run on
Now navigate back to: http//localhost:4444
You will see that you have a Firefox node configured already.
Note: to configure chrome and IE nodes, you will need to download the drivers according to your
OS.

9
Data Sources
• <?xml version="1.0" encoding="UTF-8"?>
• <!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
• <suite name="Suite" parallel="tests">
• <test name="Test With FF">
• <parameter name="browser" value="firefox" />
• <classes>
• <class name=“com.amir.TestClass" />
• </classes>
• </test>
• <test name=“Test With Chrome">
• <parameter name="browser" value="chrome" />
• <classes>
• <class name=" com.amir.TestClass " />
• </classes>
• </test>
• <test name=“Test with IE">
• <parameter name="browser" value="ie" />
• <classes>
• <class name=" com.amir.TestClass " />
• </classes>
• </test>
•
• </suite>
Run the same test with a different browser parameter

10
Data Sources
• Now, in order to differentiate between each test run you will have to receive the browser parameter which you
stated in your xml runner using TestNG’s parametrized testing method, (@Parameters("browser") ) and then
initialize each driver with the corresponding browser capabilities, using a remote webdriver.
Initalizing On Firefox:
String Node = "http://192.100.70.50:5559/wd/hub";
DesiredCapabilities capability = DesiredCapabilities.firefox();
capability.setBrowserName("firefox");
driver = new RemoteWebDriver(new URL(Node), capability);
Initialize On Chrome:
DesiredCapabilities cap = DesiredCapabilities.chrome();
cap.setBrowserName("chrome");
String Node = “http://192.100.71.50:5557/wd/hub";
driver = new RemoteWebDriver(new URL(Node), cap);
And so on.
Time to get back to the code:

There are 3 popular Cloud based solutions out there:
1) BrowserStack
2) SauceLabs
3) Rainforest
We will make a small comparison in order to determine what would suit selenium tests more
Cloud Based Solutions:

RainforestBrowserStackSauceLabs
VVVWebDriver Compatible
786Ease Of Use
XVVVideo Recording of Tests
VVVCI Integration
VVVCross Browser Testing
468Community Support
688Device Support
Need to request demo100 Automation Hours14 daysTrial
Cloud Based Solutions:

What about the price???
SauceLabs

What about the price???
BrowserStack
https://www.browserstack.com/accounts/subscriptions
1470USD (25 licenses)

 Each VM can only run one browser instance, which means, if we want to go down to 30 minutes of
run time, we will need about 25 Virtual Machines.
I have even double checked and asked one of BrowserStack’s representatives, here’s the e-mail:
Sounds good? YES! But Pricy $$$$!

 Each VM can only run one browser instance!!! WHY???
The Reply to the E-mail:

 So what about the price? Depends how much we use the machine!!
 http://calculator.s3.amazonaws.com/index.html
 Assuming we run 12 hours a day on a machine with 8 GB of RAM the monthly cost is 97 USD!
 Assuming we run 12 hours a day on a machine with 4 GB of RAM the monthly cost is 49USD!
So what about Amazon EC2?
Amazon has always been a good choice, technically, it is how we run tests on TC now, but with better machines
provided from amazon.

Just a brain Teaser taken from a survey done by a company called Tellerium :

More Teasers:

A few Takeaways from the survey:

24Confidential and propriety Galil Software, Ltd. 20128-Jul-15
Author :
Amir Najjar – Automation Development Lead.
Thank you!! Stay Tuned!! DEMO AHEAD!

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