How to run a test suite in JUnit?

Question

I am newbie to JUnit. I am running JUnit 4 in eclipse 3.2.1. I have created test cases in a package called "testsuite". Moreover, I have created a test suite in the same package to run these test cases.
Sample code for a test case:
package testsuite;
import junit.framework.TestCase;
import org.junit.Before;
import org.junit.Test;
import system.NodeItem;
public class NodeItemTest extends TestCase {
    NodeItem aNode;
    @Before
    public void setUp() throws Exception {
        aNode = new NodeItem();
        aNode.setMinTempTherm(2);
    @Test
    public void testSetMinTempTherm() {
        assertEquals(2, aNode.getMinTempTherm());
Sample code for the test suite I have created to run this case and another one:
package testsuite;
import junit.framework.Test;
import junit.framework.TestSuite;
public class AllTests {
    public static Test suite() {
        TestSuite suite = new TestSuite("Test for testsuite");
        //$JUnit-BEGIN$
        suite.addTestSuite(CommunicationTest.class);
        suite.addTestSuite(NodeItemTest.class);
        //$JUnit-END$
        return suite;
The problem is:
When I run the test cases separetly, everything runs without any problems, but when I try to run the test suite I get the follwing ERROR:
In the Failure Trace window I get *"java.lang.Exception: No runnable methods".*
In the other winodw if I double click the error, a dialog pop up which says *"Method 'testsuite.AllTests' not found. Openning the test class"*.
I have followed some tutorials to reach the point I am at now. Please help me proceed.
Thanks in advance.

Answer 1

I didn't know I don't have to extend. Here is how I modified the code after your advace and it worked. Any other good advaces?
package testsuite;
import static org.junit.Assert.assertEquals;
//import junit.framework.TestCase;
import org.junit.Before;
import org.junit.Test;
import system.NodeItem;
public class NodeItemTest /*extends TestCase*/ {
     NodeItem aNode;
     @Before
     public void setUp() throws Exception {
          aNode = new NodeItem();
          aNode.setMinTempTherm(2);
     @Test
     public void testSetMinTempTherm() {
          assertEquals(3, aNode.getMinTempTherm());
package testsuite;
import org.junit.runner.RunWith;
import org.junit.runners.Suite;
//import junit.framework.Test;
//import junit.framework.TestSuite;
@RunWith(Suite.class)
@Suite.SuiteClasses({
     CommunicationTest.class,
     NodeItemTest.class,
//    TestClass3.class
public class AllTests {
//     public static Test suite() {
//          TestSuite suite = new TestSuite("Test for testsuite");
//          //$JUnit-BEGIN$
//          suite.addTestSuite(CommunicationTest.class);
//          suite.addTestSuite(NodeItemTest.class);
//          //$JUnit-END$
//          return suite;
}Thanks again!