JUnit test with dynamic number of tests

This can be done as follows in JUnit 3:

public class XTest extends TestCase {

    public File file;

    public XTest(File file) {
        super(file.toString());
        this.file = file;
    }

    public void testX() {
        fail("Failed: " + file);
    }

}

public class XTestSuite extends TestSuite {

    public static Test suite() {
        TestSuite suite = new TestSuite("XTestSuite");
        File[] files = new File(".").listFiles();
        for (File file : files) {
                suite.addTest(new XTest(file));
        }
        return suite;
    }

}

And for JUnit 4:

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class TestY {

    @Parameters
    public static Collection<Object[]> getFiles() {
        Collection<Object[]> params = new ArrayList<Object[]>();
        for (File f : new File(".").listFiles()) {
                Object[] arr = new Object[] { f };
                params.add(arr);
        }
        return params;
    }

    private File file;

    public TestY(File file) {
        this.file = file;
    }

    @Test
    public void testY() {
        fail(file.toString());
    }

}

Here is a link to another discussion on stack overflow link