No tests found matching Method main in IntelliJ

Question

My class is a test class and it has the following structure:

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
public class MyClassTest {

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

    @Test
    public void maxTest() {
        System.out.println("test");
    }

}

If I press the right click on the main method > Run 'main', it throws the following exception:

java.lang.Exception: No tests found matching Method main(MyClassTest) from org.junit.internal.requests.ClassRequest@26aa12dd
    at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:41)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

If I press right click on the class name > Run 'MyClassTest.main()' it works fine printing:

in main

If I comment out @RunWith(PowerMockRunner.class), everything works fine in both cases.

The same problem appears if I use @RunWith(MockitoJUnitRunner.class) instead of @RunWith(PowerMockRunner.class).

Why is that difference?

Details:

• Windows 7
• JUnit 4.12
• PowerMock 1.6.2
• Java 8
• Maven 3
• IntelliJ IDEA 14.1.3

Solution

The exception is thrown as the main method is not having @Test annotation on it.

Comments

[shruti1810]

Why do you want a main method in Test class?

[ROMANIA_engineer]

It is a temporary method. It helps me to run some static methods from the tested class and to extract the output that will be used in tests. I can create another file containing the main method, but I'd like to understand why it doesn't work and how it can be fixed without avoiding the problem.

[Jonas Czech]

Nice to see that you are editing some questions, but please also fix all other problems with the questions while you are editing. Minor edits waste the time of those having to review them, and may get rejected.

[shruti1810]

Thanks @JonasCz Taking a small step to make the site have clear questions that can be easily searched.