testing: spark request/response is hard to be mocked

[qnislavnachev]

As now spark have RequestResponseFactory.create(HttpServletRequest), but this is a way harder for testing. It will be more easily if Request and Response are just interfaces and they will be mocked easily. For now to mock the request.body() method I should implement ServletInputStream and to mock HttpServletRequest.inputStream .... that looks by this way:

and then

for now I have 3 expectations instead of having just one like this:

oneOf(request).body()
will(returnValue("my body is here"))

[qnislavnachev]

Also I cannot find a way to mock request.params("some param")