java - 如何模拟 Unirest 链接方法？

Question

我有一个像这样的类，它使用 Unirest API 进行 HTTP POST 调用 -

public class MyClass{
    public MyObject getData(){
    HttpResponse response = Unirest.post(someURL).header("Content-Type", "application/x-www-form-urlencoded")
                        .field("Field1", context.getParameter("value for field 1"))
                        .field("username", context.getParameter("username"))
                        .field("password", context.getParameter("password"))
                        .field("field 3", context.getParameter("field 3 value"))
                        .field("field 4", context.getParameter("field 4 value"))
                        .asJson();
    }
    }

在我的模拟课上 -我的mockito中有一个HttpResponse对象，当调用Unirest HTTP post时会返回该对象。我不想通过 Unirest 访问端点，而是想返回我的自定义 httpResponse。

HttpResonse<JsonNode> httpResponse; // my mocked response
Mockito.when(Unirest.post(someURL).header("Content-Type", "application/x-www-form-urlencoded")
                            .field("Field1", context.getParameter("value for field 1"))
                            .field("username", context.getParameter("username"))
                            .field("password", context.getParameter("password"))
                            .field("field 3", context.getParameter("field 3 value"))
                            .field("field 4", context.getParameter("field 4 value"))
                            .asJson()).thenReturn(httpResponse); // this is my custom response

我已经模拟了所有参数的上下文，但仍然收到错误

org.mockito.exceptions.misusing.WrongTypeOfReturnValue:

HttpResponse cannot be returned by getParameter()

getParameter() should return String

有没有一种方法可以更轻松地模拟第 3 方链接方法或更好的实现示例？谢谢!

Answer 1

如果允许重构代码，最简单的方法是将静态调用提取到 protected 方法:

public class MyClass{
    public MyObject getData(){
      HttpResponse response = postRequest();
    }

    protected HttpResponse postRequest(){
       return Unirest.post(someURL).header("Content-Type", "application/x-www-form-urlencoded")
                        .field("Field1", context.getParameter("value for field 1"))
                        .field("username", context.getParameter("username"))
                        .field("password", context.getParameter("password"))
                        .field("field 3", context.getParameter("field 3 value"))
                        .field("field 4", context.getParameter("field 4 value"))
                        .asJson();
    }
}

然后在您的测试用例中，监视被测类并模拟 protected 方法:

public void test(){
   MyClass myClass = Mockito.spy(new MyClass());

   HttpResonse<JsonNode> httpResponse; // my mocked response

   doReturn(httpResponse).when(myClass).postRequest();

   ...
}