No runnable methods junit 4.11

I am implementing Swift(OpenStack Object Storage) Client to use Swift simply. I ran each of test cases successfully on IDE, but I ran test cases with Class. It throws the following exception messages.

	java.lang.Exception: No runnable methods
	at org.junit.runners.BlockJUnit4ClassRunner.validateInstanceMethods(BlockJUnit4ClassRunner.java:169)
	at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:104)
	at org.junit.runners.ParentRunner.validate(ParentRunner.java:355)
	at org.junit.runners.ParentRunner.<init>(ParentRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:57)
	at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
	at junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:30)
	at junit.framework.JUnit4TestAdapter.<init>(JUnit4TestAdapter.java:24)
	at swift.client.SwiftConfigTest.suite(SwiftConfigTest.java:17)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at org.junit.internal.runners.SuiteMethod.testFromSuiteMethod(SuiteMethod.java:35)
	at org.junit.internal.runners.SuiteMethod.<init>(SuiteMethod.java:24)
	at org.junit.internal.builders.SuiteMethodBuilder.runnerForClass(SuiteMethodBuilder.java:11)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
	at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
	at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:43)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:195)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:63)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

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Here is my code.

	package swift.client;
	import junit.framework.JUnit4TestAdapter;
	import org.junit.Test;
	import static org.hamcrest.CoreMatchers.is;
	import static org.junit.Assert.assertThat;
	/**
	* @author BJ2(Joongjin Bae)
	* @version $Rev: $Rev$ By $Author: BJ2 A.K.A. bae_joongjin $
	* $Date: 13/03/08 16:20 $
	* @since 13/03/08
	*/
	public class SwiftConfigTest {
	public static junit.framework.Test suite() {
	return new JUnit4TestAdapter(SwiftConfig.class);
	}
	@Test
	public void testConfig() {
	SwiftConfig config = new SwiftConfig();
	assertThat(config.getConnectionTimeout(), is(3000));
	}
	}

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I googled and searched several pages.

http://stackoverflow.com/questions/15383387/no-runnable-methods-on-junit-with-custom-annotation-and-all-tests-filtered

It says

You get this error due to the validation performed in validateInstanceMethods since computeTestMethods() returns an empty List: 

He suggested override or remove List size validation. I couldn't agree with him. Cause I have run my test cases with no problem on other projects. I read my code and error message again.

at swift.client.SwiftConfigTest.suite(SwiftConfigTest.java:17)

I felt it weird.  Because I don't need to run suite method. I removed suite method and ran all tests successfully.
Here is my right source code.

	package swift.client;
	import org.junit.Test;
	import static org.hamcrest.CoreMatchers.is;
	import static org.junit.Assert.assertThat;
	/**
	* @author BJ2(Joongjin Bae)
	* @version $Rev: $Rev$ By $Author: BJ2 A.K.A. bae_joongjin $
	* $Date: 13/03/08 16:20 $
	* @since 13/03/08
	*/
	public class SwiftConfigTest {
	@Test
	public void testConfig() {
	SwiftConfig config = new SwiftConfig();
	assertThat(config.getConnectionTimeout(), is(3000));
	}
	}

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