CompositeLogger implements Logger<M, E, F> { @Override public void afterUpdate(M model, E event, Next<M, F> result) { for (Logger<M, E, F> logger : loggersReversed) { logger.afterUpdate(model, event, result); } } private  CompositeLogger(List<Logger<M, E, F>> loggers); @SafeVarargs static Logger<M, E, F> from(Logger<M, E, F> logger, Logger<M, E, F>... loggers); @Override void beforeInit(M model); @Override void afterInit(M model, First<M, F> result); @Override void exceptionDuringInit(M model, Throwable exception); @Override void beforeUpdate(M model, E event); @Override void afterUpdate(M model, E event, Next<M, F> result); @Override void exceptionDuringUpdate(M model, E event, Throwable exception);  }
@Test public void delegatesAfterUpdateToAllLoggers() { AfterUpdate<String, Integer, String> testCase = AfterUpdate.create("Hello", 5, next("World", singleton("test"))); underTest.afterUpdate(testCase.model(), testCase.event(), testCase.next()); assertTestCaseLogged(testCase); }