assertEquals("Hello Bob and ${other}", result);
    }

    // Test evaluate method with complex object as parameter
    @Test
    public void test_evaluate_withComplexObject() {
        String template = "User: ${user.name}, Age: ${user.age}";
        Map<String, Object> paramMap = new HashMap<>();
        TestUser user = new TestUser("John", 30);
        paramMap.put("user", user);