}
        };

        assertNull(queryRescorer.evaluate(Collections.emptyMap()));
        assertNull(queryRescorer.evaluate(new HashMap<>()));
    }

    public void test_evaluate_withParams() {
        // Test implementation that returns a RescorerBuilder
        queryRescorer = new QueryRescorer() {
            @Override
            public RescorerBuilder<?> evaluate(Map<String, Object> params) {