使用注释时模拟Spring MVC BindingResult [英] Mocking Spring MVC BindingResult when using annotations

问题描述

我正在迁移Spring MVC控制器以使用较新的样式注释，并希望对验证命令对象的控制器方法进行单元测试(请参见下面的简单示例).

I'm migrating a Spring MVC controller to use the newer style annotations, and want to unit test a controller method that validates a command object (see simple example below).

 @RequestMapping(method = RequestMethod.POST)
public String doThing(Command command, BindingResult result,
                    HttpServletRequest request, HttpServletResponse response,
                    Map<String, Object> model){ 
    ThingValidator validator = new ThingValidator();
    validator.validate(command, result);
... other logic here
    }

我的问题是我必须在单元测试中调用控制器的方法，并提供模拟值以满足其签名以正确执行代码，而我无法解决如何模拟BindingResult的问题.

My problem is I have to call the controller's method in my unit test, and provide mock values to satisfy its signature to exercise the code properly, and I cannot work out how to mock a BindingResult.

在旧样式的Controller中，签名仅采用了HttpServletRequest和HttpServletResponse，它们很容易被模拟，但是由于新注释风格的灵活性，人们不得不通过签名传递更多信息.

In the old style Controller the signature simply took a HttpServletRequest and HttpServletResponse, which were easily mockable, but due to the flexibility of the new annotation style, one has to pass a lot more in via the signature.

如何模拟Spring BindingResult用于单元测试?

How can one mock a Spring BindingResult for use in a unit test??

推荐答案

BindingResult是一个接口，所以您不能简单地传入该接口的Springs实现之一吗?

BindingResult is an interface so can you not simply pass in one of Springs implementations of that interface?

我在Spring MVC代码中不使用注释，但是当我想测试验证器的validate方法时，我只是传入BindException的实例，然后使用在assertEquals等中返回的值.

I don't use annotations in my Spring MVC code but when I want to test the validate method of a validator I just pass in an instance of BindException and then use the values it returns in assertEquals etc.

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