// Verify that function score query contains the added boost function
        assertTrue(context.getQueryBuilder().toString().contains("function_score"));
    }

    @Test
    public void test_addBoostFunction_withFilter() {
        QueryBuilder filter = QueryBuilders.termQuery("category", "test");
        queryHelper.addBoostFunction(filter, ScoreFunctionBuilders.weightFactorFunction(2.0f));