@Test
public void testLogWithoutLocationWithMessageOnly() {

  final Logger log = mock(Logger.class);
  final Slf4jLogTarget target = new Slf4jLogTarget(log);
  target.log(LogLevel.TRACE, null, "format %s", 1, new Object[] {"arg"}, null, Zlg.entrypoint);
  
  verify(log).trace(eq("format arg"));
}