Threading Priority test

package ThreadingTest.Priority;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

@Retention(java.lang.annotation.RetentionPolicy.RUNTIME)
@Target(value={ElementType.METHOD, ElementType.TYPE})
public @interface Priority {
  int value() default 0;
}


package ThreadingTest.Priority;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

import org.testng.IMethodInstance;
import org.testng.IMethodInterceptor;
import org.testng.ITestContext;


public class PriorityInterceptor implements IMethodInterceptor {

      public List<IMethodInstance> intercept(List<IMethodInstance> methods, ITestContext context) {
        Comparator<IMethodInstance> comparator = new Comparator<IMethodInstance>() {
       
          private int getPriority(IMethodInstance mi) {
            int result = 0;
            Method method = mi.getMethod().getMethod();
            Priority a1 = method.getAnnotation(Priority.class);
            if (a1 != null) {
              result = a1.value();
            } else {
              Class cls = method.getDeclaringClass();
              Priority classPriority = (Priority) cls.getAnnotation(Priority.class);
              if (classPriority != null) {
                result = classPriority.value();
              }
            }
            return result;
          }

          public int compare(IMethodInstance m1, IMethodInstance m2) {
            return getPriority(m1) - getPriority(m2);
          }
       
        };
        IMethodInstance[] array = methods.toArray(new IMethodInstance[methods.size()]);
        Arrays.sort(array, comparator);

        return Arrays.asList(array);
      }

    }

package ThreadingTest.Priority;

import org.testng.annotations.Test;

public class PriorityTestPlan   {

  @Test

  public void method1() { System.out.println("M1 Default priority");}

  @Priority(1)

  @Test

  public void method2()  { System.out.println("M2 Priority 1");}

  

  @Priority(3)

  @Test

  public void method3()  { System.out.println("M3 Priority 3");}

  

  @Priority(-1)

  @Test

  public void method4()  { System.out.println("M4 Priority -1");}

  @Priority(2)

  @Test

  public void method5()  { System.out.println("M5 Priority 2");}

  @Priority(2)

  @Test

  public void method6()  { System.out.println("M6 Priority 2");}

}

<suite name="PriorityTestSuite" verbose="1" >

    <listeners>

        <listener class-name="ThreadingTest.Priority.PriorityInterceptor" />

    </listeners>

    

    <test name="PriorityTestPlan" preserve-order="true">

    <classes>

        <class name="ThreadingTest.Priority.PriorityTestPlan"></class>

    </classes>

    </test>

</suite>