JUnit : assert Exception

JUnitExceptionTest.java

import org.junit.Test;
import org.junit.Rule;
import org.junit.rules.ExpectedException;
 
public class JUnitExceptionTest {
 
    @Rule
    public ExpectedException exception = ExpectedException.none();
 
    @Test
    public void testDoWork() {
        exception.expect(IllegalStateException.class);
        throw new IllegalStateException();
    }
 
}