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Design a Test Automation Framework with Selenium and Java

Parameterisation, DataProvider and Factory

Explore how to parameterize TestNG tests using @Parameters, create multiple test executions with @DataProvider, and dynamically instantiate test classes with @Factory. Understand how to pass parameters from testng.xml and use parallel execution settings. This lesson equips you to design flexible, data-driven test cases in Java.

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@Parameters #

Tests can be parameterized using @Parameter. They can be passed from testng.xml. Parameters can be set at suite level or test level.

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="Sample Test Suite">
    <parameter name="browser" value="chrome" />
    <test name="Sample Test">
        <parameter name="browser" value="chrome" />
    </test>
</suite>

Here in the above testng.xml, we set the parameter browser to chrome at the test suite level. The same parameter can be overridden at the test level as well, as shown.

To use parameter in the test method, follow the following approach.

@Parameters("browser")
@Test
public void testMethod(String browser) {

}

For configuration methods like @BeforeXXX and @AfterXXX, follow the following approach.

@Parameters("browser")
@BeforeMethod
public void initMethod(String browser) {

}
...