Map<String, Object> emptyResult = emptyEvent.toSource();
        assertNotNull(emptyResult);
        assertTrue(emptyResult.isEmpty());
    }

    // Test getEventType method
    public void test_getEventType() {
        // Test search event type
        TestSearchLogEvent searchEvent = new TestSearchLogEvent("id", 1L, "search");
        assertEquals("search", searchEvent.getEventType());