assertEquals("result", groovyEngine.evaluate("return 'result'", emptyMap));
    }

    /**
     * Test that evaluate handles paramMap with null values
     */
    @Test
    public void test_evaluate_paramMapWithNullValues() {
        final Map<String, Object> params = new HashMap<>();
        params.put("key1", null);
        params.put("key2", "value");