Generating TestNG.xml file from a simple "Hello World" code JAVA

Question

I configured my eclipse environment to generate a TESTNG.xml file.

My code has this:

package testMy;

    public class testMy {
        public static void main(String[] args) {
            System.out.println("Hello!"); 
    
    }
        
    }

I installed TESTNG plugin and then i click on the project and selected option "convert to TESTNG"

I got this XML:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Suite">
  <test thread-count="5" name="Test">
  </test> <!-- Test -->
</suite> <!-- Suite -->

Is it valid? I do not see any "Hello!" message or something like that inside of that?

Am i missing anything?

Answer 1

Conclusion First

testng.xml

Add this under test

<classes>
  <class name="myTest.DemoTest"/>
</classes>

Add unit test java DemoTest.java

MyTest

├── pom.xml
└── src
    ├── main
    │   ├── java
    │   │   └── testMy
    │   │       └── testMy.java
    │   └── resources
    └── test
        ├── java
        │   └── testMy
        │       └── DemoTest.java
        └── resources
            └── testng.xml

testMy.java

package testMy;

public class testMy {

    public static void main(String[] args) {
         System.out.println("Hello!"); 

    }
    public String echo(String msg) {
        return msg;
    }
    public String hello(String msg) {
        return "Hello "+msg;
    }
}

testng.xml

<?xml version="1.0" encoding="UTF-8"?>
<suite name="Suite" parallel="false">
  <test name="Test">
    <classes>
      <class name="myTest.DemoTest"/>
    </classes>
  </test> <!-- Test -->
</suite> <!-- Suite -->

DemoTest.java

package testMy;

import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

public class DemoTest {
    private testMy theOne=null;
    @BeforeClass
    public void setUp() {
        theOne =new testMy();
    }
    


      @Test
      public void testEcho() {
          Assert.assertEquals("AAAA",theOne.echo("AAAA"));
      }
      @Test
      public void testHello() {
          Assert.assertEquals("Hello AAAA",theOne.hello("AAAA"));
      }

}