'No JUnit tests found' in Eclipse

Question

So I'm new to JUnit, and we have to use it for a homework assignment. Our professor gave us a project that has one test class, BallTest.java. When I right click > Run as > JUnit Test, I get a popup error that says 'No JUnit tests found'. I know the question has been answered here(No tests found with test runner 'JUnit 4'), but closing eclipse, restarting, cleaning, and building doesn't seem to work. Below are screenshots of my run configuration, build path, and the class I'm trying to test.

BallTest.java

import static org.junit.Assert.*;
import junit.framework.Assert;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 

public class BallTest {

Ball ball;

/**
 * @throws java.lang.Exception
 */
@Before
public void setUp() throws Exception {
    System.out.println("Setting up ...");
    Point2D p = new Point2D(0,0);
    ball = new Ball(p);
}

/**
 * @throws java.lang.Exception
 */
@After
public void tearDown() throws Exception {
    System.out.println("Tearing down ...");
    ball = null;
}

/**
 * Test method for {@link Ball#getCoordinates()}.
 */
@Test
public void testGetCoordinates() {
    assertNotNull(ball); // don't need Assert. because of the import statement above.
    Assert.assertEquals(ball.getCoordinates().getX(), 0);
    Assert.assertEquals(ball.getCoordinates().getY(), 0);
}

/**
 * Test method for {@link Ball#setCoordinates(Point2D)}.
 */
@Test
public void testSetCoordinates() {
    Assert.assertNotNull(ball);
    Point2D p = new Point2D(99,99);
    ball.setCoordinates(p);
    Assert.assertEquals(ball.getCoordinates().getX(), 99);
    Assert.assertEquals(ball.getCoordinates().getY(), 99);
}

/**
 * Test method for {@link Ball#Ball(Point2D)}.
 */
@Test
public void testBall() {
    Point2D p = new Point2D(49,30);
    ball = new Ball(p);
    Assert.assertNotNull(ball);
    Assert.assertEquals(ball.getCoordinates().getX(), 49);
    Assert.assertEquals(ball.getCoordinates().getY(), 30);

    //fail("Not yet implemented");
}

public static void main (String[] args) {
         Result result = JUnitCore.runClasses(BallTest.class);
         for (Failure failure : result.getFailures()) { 
                System.out.println(failure.toString()); 
            } 
        System.out.println(result.wasSuccessful());  
}

}

Solution 1

Right Click on Project > Properties > Java Build Path > Add the Test folder as source folder.

All source folders including Test Classes need to be in Eclipse Java Build Path. So that the sources such as main and test classes can be compiled into the build directory (Eclipse default folder is bin).

Solution 2

If none of the other answers work for you, here's what worked for me.

Restart eclipse

I had source folder configured correctly, and unit tests correctly annotated but was still getting "No JUnit tests found", for one project. After a restart it worked. I was using STS 3.6.2 based of eclipse Luna 4.4.1

Solution 3

right click -> build path -> remove from build path and then again add it -> Right click on the folder named 'Test' > Build Path > Use as Source Folder.

Solution 4

I had the same problem and solved like this: I deleted @Test annotation and retyped it. It just worked, I have no idea why.

Solution 5

It looks like you're missing the runner definition on your test class, that could be the cause:

import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class BallTest {
...
}

View more solutions

Comments

[dkatzel]

I did not know about the Juni4 runner alias. I've always explicitly mentioned the runner class name.

[Klazen108]

Are you referring to the package prefix import for JUnit4? If so, I know what you mean, Eclipse won't auto-import the package for you if the only reference to JUnit4 is in the annotation. It gets old quickly if you have a lot of test classes like I did :)

[iaacp]

I was hoping this would be it, but sadly I'm still getting the same error.

[Klazen108]

When you run the test as an application (the main method) does it execute the tests? If so, it's an eclipse configuration issue. Otherwise it's the code somehow. Let us know if that works.

[iberbeu]

If you don't have the folder "test" as source folder, eclipse is not going to look for code there

[Arunchunaivendan]

1. Under src folder, main and test folders should be present by default. If not, create a test folder then write the test cases/suites. 2. After creating cases/suites go to Debug or Run configurations and add JUnit test case under Test menu (If you don't find one, add JUnit to your build path). 3. Then as khylo suggested, restart eclipse. Happy testing.

[Rajith Gun Hewage]

You might want to try restarting eclipse if this doesn't fix it, as @khylo 's answer says.

[NIKHIL CHAURASIA]

Appreciation for this crazy solution, :D that works like charm, hehehe

[LConrad]

I had a similar issue - somehow my test had gotten added to the "Excluded:" area on the Source tab of Java Build Path.

[Rasshu]

That screwed my Build Path.

[Paul Marcelin Bejan]

You're a genius! Thanks!