assertNotNull(result);
    }

    /**
     * Test FieldQueryBuilder functional interface.
     */
    @Test
    public void test_fieldQueryBuilder_interface() {
        QueryCommand.FieldQueryBuilder builder = (field, text, boost) -> QueryBuilders.termQuery(field, text).boost(boost);

        QueryBuilder result = builder.buildQuery("title", "test", 2.0f);