### Question:
LoggingExceptionCallback implements IExceptionCallback <Throwable>, IHasErrorLevel { public void onException (@Nullable final Throwable t) { final String sLogMessage = getLogMessage (t); final boolean bLogException = isLogException (t); LogHelper.log (LOGGER, m_aErrorLevel, sLogMessage, bLogException ? t : null); } LoggingExceptionCallback(); @Nonnull IErrorLevel getErrorLevel(); @Nonnull final LoggingExceptionCallback setErrorLevel(@Nonnull final IErrorLevel aErrorLevel); void onException(@Nullable final Throwable t); @Override String toString();  }### Answer:
@Test public void testAll () { new LoggingExceptionCallback ().onException (new MockException ()); }