Unit test for stackless exceptions

StacklessExceptionsTest.java

import org.junit.Test;
import static org.junit.Assert.assertThat;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;


/**
 * Unit test for stackless exceptions
 */
public class StacklessExceptionsTest {

	@Test
	public void testCheckedException() {
		try {
			throw new StacklessException();
		} catch (StacklessException e) {
			assertThat(e, hasNoStackTrace());
		}
	}

	@Test
	public void testUncheckedException() {
		try {
			throw new RuntimeStacklessException();
		} catch (RuntimeStacklessException e) {
			assertThat(e, hasNoStackTrace());
		}
	}

	private static class ThrowableHasNoStackTrace extends
			BaseMatcher<Throwable> {

		@Override
		public boolean matches(Object object) {
			Throwable t = (Throwable) object;
			return t.getStackTrace().length == 0;
		}

		@Override
		public void describeTo(Description desc) {
			desc.appendText("stackless exception has a stack trace");
		}

	}

	static Matcher<? super Throwable> hasNoStackTrace() {
		return new ThrowableHasNoStackTrace();
	}
}