IExecutionListener

1ExecutionListener1.java

// ExecutionListener1


package com.Iexecutelistener;

import org.testng.IExecutionListener;

public class ExecutionListener1 implements IExecutionListener {
    private long startTime;

    @Override
    public void onExecutionStart() {
        startTime = System.currentTimeMillis();
        System.out.println("Starting On execution test from ExecutionListener1 ");
        
    }

    @Override
    public void onExecutionFinish() {
        System.out.println("Starting On execution test  has finished, took around " + (System.currentTimeMillis() - startTime) + "ms");
    }
}

2ExecutionListener2.java

// ExecutionListener2

package com.Iexecutelistener;

import org.testng.IExecutionListener;

public class ExecutionListener2 implements IExecutionListener {

    @Override
    public void onExecutionStart() {
        System.out.println("Starting On execution test from ExecutionListener2");
        
    }

    @Override
    public void onExecutionFinish() {
        System.out.println("Starting On execution test TestNG is finished");
    }
}

3.TestClass.java

Create a testNG test class TestClass, it has a @BeforeSuite, a test and an @AfterSuite method.

 package com.Iexecutelistener;

import org.testng.annotations.BeforeSuite;
import org.testng.annotations.Test;

public class TestClass {
    @BeforeSuite
    public void beforeSuite() {
        System.out.println("Am in Before Suite");
    }
   
    @Test
    public void t() {
        System.out.println("In Test Method t...");
    }
}

4.testng.xml

Create XML file that calls these listeners like;
<?xml version="1.0" encoding="UTF-8"?>
<suite name="Suite" parallel="false">
    <listeners>
        <listener class-name="com.Iexecutelistener.ExecutionListener1" />
        <listener class-name="com.Iexecutelistener.ExecutionListener2" />
    </listeners>

    <test name="Test">
        <classes>
            <class name="com.Iexecutelistener.TestClass" />
        </classes>
    </test>
</suite>