Data Driven Testing with Selenium IDE

Selenium IDE does not have in-built features to create data-driven tests. However there are multiple options available in the form of Selenium IDE User Extension or Add-On for creating Data Driven tests.

This post will explore using a Selenium IDE Add-on called Sel Blocks to create Data Driven tests on a sample BMI Calculator application. This is a simplest option available for Selenium IDE for data-driven tests.

The Sel Blocks Add-on provides various flow control elements such as conditional handling, looping, variables and data-driven testing in Selenium IDE tests.

Install the Sel Blocks for Selenium IDE Add-On using the Add-On Manager in Firefox from

Creating Data Driven Tests
First we need to identify test data for the script. The Sel Blocks Add-on needs the test data in XML format. Create a XML file with following format:

	<vars height="160" weight="45" bmi="17.6" bmi_category="Underweight" />
	<vars height="168" weight="70" bmi="24.8" bmi_category="Normal" />
	<vars height="181" weight="89" bmi="27.2" bmi_category="Overweight" />
	<vars height="178" weight="100" bmi="31.6" bmi_category="Obesity" />

You can have data rows defined as <vars> element under the root element <testdata>. In <vars> element you can define all the parameters needed for the test. Create the following script in Selenium IDE:


How it works
In this test the type and verifyValue commands are parameterized by substituting values from the test data specified in above XML file.

The forXml command of Sel Blocks is supplied with the name of XML file where test data is stored. In this example path of data.xml file is passed to the forXml command.

When this test is executed, Sel Blocks loads the content of XML file in memory and executes the script for number of times <vars> element present in the XML file. In this example it will execute the test for four times.

For all the attributes mentioned in <vars> element, Sel Blocks create internal variables that we can substitute as Selenium command parameters.

You can analyse the Selenium IDE Log tab for  results. If the expected data and actual data do not match, an error is reported in the Selenium IDE Log tab.

There’s more
You can also use datadriven user extension to create Data Driven tests. You need to install flowControl andinclude user extensions to use the dataddriven extension. Sel Blocks is easier option as it does not have dependency on any other extension. For more info visit

This post covers Data Driven testing with Selenium IDE. If you are looking for Data Driven testing with Selenium WebDriver, grab my book Selenium Testing Tools Cookbook published by PacktPub