assertTrue(logMessage.contains("url:http://example.com/path with tabs"));
        assertFalse(logMessage.contains("url:http://example.com/path\twith\ttabs"));
    }

    public void test_recordOnNonExistentKey() {
        String key = "non_existent";
        crawlerStatsHelper.record(key, "test_action");

        assertNull(localLogMsg.get());
    }

    public void test_runOnThreadOnNonExistentKey() {