assertEquals("value", MapValueExtractor.getString(map, "key", "default"));
        assertEquals("default", MapValueExtractor.getString(map, "missing", "default"));
    }

    @Test
    public void testGetLong_withLongValue() {
        Map<String, Object> map = new HashMap<>();
        map.put("long", 123L);
        map.put("int", 456);
        map.put("string", "789");