TestNG Parameterization (2024)
In this tutorial, we will learn about the TestNG Parameterization and it's different ways to implement.
TestNG Tutorial :
Q: What is the TestNG Parameterization?
Ans:
The TestNG Parameterization is one of the features of TestNG provides one can run the same test over and over again with different values. In simple words, TestNG Parameters are the arguments that are implemented in the test methods.
Q: How many types of TestNG Parameters?
Ans:
There are two types of TestNG Parameters, they are:
Uses of TestNG Parameters
In TestNG parameters are used as numbers of test cases are run with multiple input values so for keeping the test case result successfully. Every time a Hardcode test is not possible the TestNG Parameterization is helpful in testing because if one change is required, the whole test script is to be edited.
TestNG Parametrization use makes the testing easy and makes it in a more organized form.
Example of TestNG Parameter using testng.xml file
Here TestNG parameters using the testng.xml file are applied inside the tag. If parameters are applied to all the test cases then it is applied inside the tag and if parameters are related to the specific folder then applied within a tag.
Create Test Class
Create test class to access parameter from testng.xml files using @Parameters annotation.
package com.techgeeknext.parameterization;
import org.testng.annotations.Parameters;
import org.testng.annotations.Test;
public class TestDebit {
@Test
@Parameters({ "balance", "amount" })
public void add(int balance, int amount) {
int total = balance - amount;
System.out.println("TestDebit- Total balance amount :
" + balance + "-" + amount + " = " + total);
}
}
package com.techgeeknext.parameterization;
import org.testng.annotations.Test;
import org.testng.annotations.Parameters;
public class TestCredit {
@Test
@Parameters({ "balance", "amount" })
public void add(int balance, int amount) {
int total = balance + amount;
System.out.println("TestCredit- Total balance amount :
" + balance + "+" + amount + " = " + total);
}
}
testng.xml
In this case parameters are applicable to all test cases.<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Suite">
<parameter name="balance" value="100"/>
<parameter name="amount" value="50"/>
<test name="TestCredit">
<classes>
<class name="com.techgeeknext.parameterization.TestCredit" />
</classes>
</test> <!-- Test -->
<test name="TestDebit">
<classes>
<class name="com.techgeeknext.parameterization.TestDebit" />
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Suite">
<test name="TestCredit">
<parameter name="balance" value="200"/>
<parameter name="amount" value="40"/>
<classes>
<class name="com.techgeeknext.parameterization.TestCredit" />
</classes>
</test> <!-- Test -->
<test name="TestDebit">
<parameter name="balance" value="300"/>
<parameter name="amount" value="20"/>
<classes>
<class name="com.techgeeknext.parameterization.TestDebit" />
</classes>
</test> <!-- Test -->
</suite> <!-- Suite -->
Q: What are data providers in the TestNG Parameters?
Ans:
In TestNG, Data providers help to proceed parameter values directly to the test method. It permits the users to write data-driven tests where they can run multiple times the same test method with different sets of test data.
Data providers parameters are used when complex parameters are passed to the created Java objects or
objects read file from a database or property. Data Provider is denoted as @DataProvider. An array
of the object is returned by the Data Provider.
Example of using Data Providers in the TestNG
package com.techgeeknext.parameterization;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class TestLoginData {
@Test(dataProvider = "getUserData")
public void testData(String user, String address) {
System.out.println("userName: "+user +" password: "+address);
}
@DataProvider
public Object[][] getUserData() {
Object[][] userData = new Object[4][2];
userData[0][0] = "TechGeekUser1";
userData[0][1] = "AAA";
userData[1][0] = "TechGeekUser2";
userData[1][1] = "BBB";
userData[2][0] = "TechGeekUser3";
userData[2][1] = "CCC";
userData[3][0] = "TechGeekUser4";
userData[3][1] = "DDD";
return userData;
}
}
