@Test
public void testInfo() throws Exception {

    Logger logger = Mockito.mock(Logger.class);
    when(logger.isInfoEnabled()).thenReturn(true);
    LogHelper.info(logger, "info");
    verify(logger).info("info");
    Throwable t = new RuntimeException();
    LogHelper.info(logger, t);
    verify(logger).info(t);
    LogHelper.info(logger, "info", t);
    verify(logger).info("info", t);
}