TestNG provides a way to get the data from external sources like from excel/textfile/arrays which helps to prepare data driven framework in automation.
@Parameters – pass parameters from the testNG.xml
@dataProvider – Pass the parameters as a 2D array.
reference – https://testng.org/doc/documentation-main.html#parameters
In this post we will look into the testNG @Parameters
Let’s see the code implementation
@Parameters
package annotationpkg;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class parameters {
@Test
@Parameters({"browser", "url"})
public void parameterTest(String browserName,String browserUrl) {
System.out.println("Browser used : " + browserName);
System.out.println("url under test : " + browserUrl);
}
}and the testng.xml looks like:
<xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="MySuite" parallel="none">
<test name="MyTest1">
<parameter name="browser" value="chrome"/>
<parameter name="url" value="https://qavbox.github.io/demo"/>
<classes>
<class name="annotationpkg.parameters"/>
</classes>
</test>
</suite>As you can see above testng.xml, we have 3 parameter tags to pass to our method parameterTest(), and the method accepts as @parameters(…)
Parameters can be of data type like integer, character, string, boolean etc.
If you change the testng.xml file to below [don’t pass one parameter from the testng.xml], then we will get exception –
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd" >
<suite name="Suite1" verbose="1" >
<test name="Regression1" >
<!--parameter name="browser" value="firefox"/-->
<parameter name="url" value="https://qavbox.github.io/demo"/>
<classes>
<class name="testNgLearning.parameter.SampleParameterTest"/>
</classes>
<test>
<suite> Output –
[Utils] [ERROR] [Error] org.testng.TestNGException:
Parameter 'browser' is required by @Test on method d_report but has not been marked @Optional or defined
To avoid this above error, either we will need to uncomment the browser parameter, or we need to use Optional keyword
public class parameters {
@Test
@Parameters({"browser", "url"})
public void parameterTest(@Optional("chrome") String browserName,String browserUrl) {
System.out.println("Browser used : " + browserName);
System.out.println("url under test : " + browserUrl);
}
}This above code will first check for the browser in testng.xml, if it’s not found then the default value it will take as chrome [@Optional(“chrome”) String browserName]
Now you can run above tesng.xml to get the output as
Browser used : chrome url under test : https://qavbox.github.io/demo
Hope this helps!
