Mockito mocking restTemplate.postForEntity

问题

I am trying to mock restTemplate.postForEntity method,

The actual method call is:

URI myUri = new URI(myString);
HttpEntity<String> myEntity ...


String myResponse = restTemplate.postForEntity(myUri, myEntity, String.class);

What I have in my test class is:

Mockito.when(restTemplate.postForEntity(any(URI.class), any(HttpEntity.class), eq(String.class))).thenReturn(response);

This does not work; I have tried several other permutations with no success either. Any suggestions appreciated, thanks.

By this does not work I mean that the actual method is called and not the mocked method (so the desired result is not returned etc.)

回答1:

The following code works for me - when(mockRestTemplate.postForEntity(anyString(), any(), eq(String.class))).thenReturn(response);

回答2:

You have to make sure that you initialize the restTemplate as a mock in your tests

 RestTemplate restTemplate = mock(RestTemplate.class);

AND that this (mocked) rest template is the one being used in your actual method call. You could have a setRestTemplate() method on your object, and you could use that to set the restTemplate:

 myTestObject.setRestTemplate(restTemplate);

Mocks will never just call the original method, so if that's happening you can be pretty sure your actual method is not using a mock. (Real) mocks will either return what you told them to, or null.

回答3:

I'd guess that the postForEntity method is final - you could use RestOperations instead of RestTemplate to work around that.

回答4:

This is what worked for me Firstly a resttemplate needs to be mocked in the test class

@Mock private RestTemplate mockRestTemplate;

Since ResponseEntity returns an Object create another method that returns the expected response wrapped in ResponseEntity

private ResponseEntity<Object> generateResponseEntityObject(String response, HttpStatus httpStatus){
    return new ResponseEntity<>(response, httpStatus);
}

In your test case, you can now mock the expected response as follows

String string = "result";
when(mockRestTemplate.postForEntity(anyString(), any(), any()))
        .thenReturn(generateResponseEntityObject(string, HttpStatus.OK));

回答5:

resttemplate returns ResponseEntity

Postforentity so something like ResponseEntitymyResponse= restTemplate.postForEntity(myUri, myEntity, StringToReturn.class); where StringToReturn is whatever type to return (just String in your case)

来源：https://stackoverflow.com/questions/25272391/mockito-mocking-resttemplate-postforentity

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java

unit-testing

testing

mocking

mockito