Didnt know smth like that is valid...

gistfile1.java

// java class
...
@Rule public ExpectedException exc;
...
 @Test
    public void testLoggingOnXRule() throws IOException {
        (exc = ExpectedException.none()).expect(org.drools.runtime.rule.ConsequenceException.class);
        (exc = ExpectedException.none()).expectMessage(StringStartsWith.startsWith(MessageFormat.format("Exception executing consequence for rule {0} in defaultpkg: java.lang.NullPointerException", "\"X Rule\"")));