How to run multiple test classes in TestNG?

testng.xml has a format as where we define what all test classes should be executed. Users can mention n number of classes in testing.xml that require executing. In this article, we are going to discuss how to execute more than one class using a single testing.xml.

Here, we will have two classes with multiple test methods, and we will see how testng.xml is configured to run both the classes - NewTestngClass and OrderofTestExecutionInTestNG.

Approach/Algorithm to solve this problem

• Setp 1 − Create two TestNG classes - NewTestngClass and OrderofTestExecutionInTestNG.

• Setp 2 − Write two different @Test method in both the classes - NewTestngClass and OrderofTestExecutionInTestNG.

• Setp 3 − Now create the testNG.xml as given below.

• Setp 4 − Now, run the testNG.xml or directly testNG class in IDE or compile and run it using command line.

Example

The following code shows how to run multiple classes −

src/ NewTestngClass.java

import org.testng.annotations.Test;
public class NewTestngClass {
   @Test
   public void testCase1() {
      System.out.println("in test case 1 of NewTestngClass");
   }
   @Test
   public void testCase2() {
      System.out.println("in test case 2 of NewTestngClass");
   }
}

src/OrderofTestExecutionInTestNG.java

import org.testng.annotations.Test;
public class OrderofTestExecutionInTestNG {
   // test case 1
   @Test
   public void testCase3() {
      System.out.println("in test case 3 of OrderofTestExecutionInTestNG");
   }
   // test case 2
   @Test
   public void testCase4() {
      System.out.println("in test case 4 of OrderofTestExecutionInTestNG");
   }
}

testng.xml

This is a configuration file that is used to organize and run the TestNG test cases. It is very handy when limited tests are needed to execute rather than the full suite.

Output

in test case 1 of NewTestngClass
in test case 2 of NewTestngClass
in test case 3 of OrderofTestExecutionInTestNG
in test case 4 of OrderofTestExecutionInTestNG
===============================================
Suite1
Total tests run: 4, Passes: 4, Failures: 0, Skips: 0
===============================================