Unit testing of Servlets

Question

I need to write unit test around a function which takes HttpServletRequest and HttpServletResponse object as an argument.

If I create the mock of these two object(request and response), how change in one will reflect in another.

Ex. If I want to unit test around the code where I am setting the header in response object.

response.addHeader("X-UA-Compatible", "IE=EmulateIE7");

Let me know how to proceed .

Try using one of the frameworks defined [here](http://stackoverflow.com/a/91109/245679). This will make your life easier. — MD Sayem Ahmed, Apr 15 '13 at 06:49
Have you seen this : http://httpunit.sourceforge.net/doc/servletunit-intro.html — AllTooSir, Apr 15 '13 at 06:49

score 0 · Answer 1 · answered Apr 15 '13 at 06:48

In your mocking library there will be some way to assert that a method has been invoked. So, your test code would include a statement such as:

// psuedo-code
assertThat(mockResponse).addHeader("X-UA-Compatible", "IE=EmulateIE7");

In the mocking frameworks I have used (JMock, Mockito), there is no automatic co-operation between mocked objects. So your mocked HttpServletRequest will have no relationship to your mocked HttpServletResponse unless you declare one.

score 0 · Answer 2 · answered Apr 15 '13 at 06:49

0

The Spring Framework provides both a MockHttpServletRequest and a MockHttpServletResponse.

answered Apr 15 '13 at 06:49

score 0 · Answer 3 · answered Apr 15 '13 at 06:54

The problem is with standard mocks, they will create you a proxy. So you may never know if the correct value was set after the code calls

response.addHeader("X-UA-Compatible", "IE=EmulateIE7");

If you create the stub yourself then you can actually verify what was set in the method call. But this approach has many problems as well.

Unit testing of Servlets

3 Answers3