How to call the test plans dynamically

How to call the test plans dynamically using testng?

We can call the test plans dynamically using @Factory Annotation in testng.

Factories - Factories allow you to create tests dynamically
@Factory - Marks a method as a factory that returns objects that will be used by TestNG as Test classes. The method must return Object[].

Please find the below steps

1. In your MainTestPlan have a method with @Factory annotation which determines the type of test plan to be called dynamically and return the Object array
2. Have your Test Plans with your test methods
3. Configure your testng.xml file using classes tag and define your main test plan class name

Please find the sample code below.
 
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1.  TestPlan1.java

package com.test.sample;
import org.testng.annotations.Test;

public class TestPlan1{
   
    @Test
    public void testPlan1Method1()throws Exception {
        System.out.println("testPlan1Method1- invoked");
    }
   
    @Test
    public void testPlan1Method2()throws Exception {
        System.out.println("testPlan1Method2 - invoked");
    }
   

   @Test
    public void testPlan1Method3()throws Exception {
        System.out.println("testPlan1Method3- invoked");
    }
   
    @Test
    public void testPlan1Method4()throws Exception {
        System.out.println("testPlan1Method4 - invoked");
    }
 }


2.  TestPlan2.java


package com.test.sample;
import org.testng.annotations.Test;

public class TestPlan2{
   
  @Test
    public void testPlan2Method1()throws Exception {
        System.out.println("testPlan2Method1- invoked");
    }
   
    @Test
    public void testPlan2Method2()throws Exception {
        System.out.println("testPlan2Method2 - invoked");
    }

}



3. DynamicTestPlanTest.java 


package com.test.sample;

import java.util.ArrayList;
import java.util.List;
import org.testng.annotations.Factory;

public class DynamicTestPlanTest {
    TestPlan1 obj1;
    TestPlan2 obj2;
   
    @Factory
    public Object[] setUp() throws Exception {
       List list=new ArrayList();
       
        int a=30,b=20,c;
       
        if(a>b){
            obj1=new TestPlan1();
            list.add(obj1);
        }else{
            obj2=new TestPlan2();
            list.add(obj2);
        }
       
        Object[] data = list.toArray(); 
        return data;
    }
   
}


4. testng.xml

<!DOCTYPE suite SYSTEM "http://beust.com/testng/testng-1.0.dtd" >
<suite name="DynamicTestPlanTestSuite" verbose="1" >
      
    <test name="DynamicTestPlanTest" preserve-order="true">
    <classes>
        <class name="com.test.sample.DynamicTestPlanTest"></class>
    </classes>
    </test>
</suite>


Output:

testPlan1Method1- invoked
testPlan1Method2- invoked
testPlan1Method3- invoked
testPlan1Method4- invoked