How to run test methods in specific order in JUnit4?

Question

I want to execute test methods which are annotated by @Test in specific order.

For example:

public class MyTest {
    @Test public void          


        

Answer 1

Its one of the main issue which I faced when I worked on Junit and I came up with following solution which works fine for me:

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.InitializationError;

public class OrderedRunner extends BlockJUnit4ClassRunner {

    public OrderedRunner(Class clazz) throws InitializationError {
        super(clazz);
    }

    @Override
    protected List computeTestMethods() {
        List list = super.computeTestMethods();
        List copy = new ArrayList(list);
        Collections.sort(copy, new Comparator() {

            @Override
            public int compare(FrameworkMethod f1, FrameworkMethod f2) {
                Order o1 = f1.getAnnotation(Order.class);
                Order o2 = f2.getAnnotation(Order.class);

                if (o1 == null || o2 == null) {
                    return -1;
                }

                return o1.order() - o2.order();
            }
        });
        return copy;
    }
}

also create a interface like below:

 @Retention(RetentionPolicy.RUNTIME)


@Target({ ElementType.METHOD})

public @interface Order {
public int order();
}

Now suppose you have class A where you have written several test cases like below:

(@runWith=OrderRunner.class)
Class A{
@Test
@Order(order = 1)

void method(){

//do something

}

}

So execution will start from method named "method()". Thanks!