LogEvent result = policy.rewrite(event);
        assertSame(event, result);
    }

    @Test
    public void test_rewrite_error_to_warn_matching_logger() {
        String[] loggerNames = { "test.logger" };
        ErrorToWarnRewritePolicy policy = new ErrorToWarnRewritePolicy(loggerNames);

        LogEvent event = Log4jLogEvent.newBuilder()