assertEquals("FacetInfo [field=null, query=null, size=null, minDocCount=null, sort=null, missing=null]", result);
    }

    // Test toString method with empty arrays
    @Test
    public void test_toString_emptyArrays() {
        facetInfo.field = new String[0];
        facetInfo.query = new String[0];

        String result = facetInfo.toString();