Ruby Programming Language :: Mocking Net::HTTP


	Mocking Net::HTTP I am currently finishing up a release of Rannel, a library for sending sms messages through the open source SMS/WAP Gateway Kannel. I have a couple of Unit tests that assure that the commands are send correctly to Kannel and all the tests are passing (i.e. it's working :) ). Looking at the unit test code though, I realized, that I am violating one of the unit test premisses; The Independence of the Tests! Therefore I thought that I could mock up the Net::HTTP requests done to Kannel, but my problem here is that I am not quite sure how I can do that, as the adapters (for GET and POST requests) actually use this package (Net::HTTP). What would you recommend? Should I write a MockGet/Post adapter that will do the job? Or is there a transparent way to change the behavior of Net::HTTP without touching the adapters? Thank you in advance, Enrique Comba Riepenhausen - Hide quoted text - On Sat, May 26, 2007 at 01:45:06AM +0900, Enrique Comba Riepenhausen wrote: > I am currently finishing up a release of Rannel, a library for > sending sms messages through the open source SMS/WAP Gateway Kannel. > I have a couple of Unit tests that assure that the commands are send > correctly to Kannel and all the tests are passing (i.e. it's > working :) ). > Looking at the unit test code though, I realized, that I am violating > one of the unit test premisses; The Independence of the Tests! > Therefore I thought that I could mock up the Net::HTTP requests done > to Kannel, but my problem here is that I am not quite sure how I can > do that, as the adapters (for GET and POST requests) actually use > this package (Net::HTTP). > What would you recommend? Should I write a MockGet/Post adapter that > will do the job? Or is there a transparent way to change the behavior > of Net::HTTP without touching the adapters? I'm pretty sure Flexmock can do this. http://onestepback.org/software/flexmock/ Scan down to "Mocking Class Objects". I've used it to mock calls to my own classes (but not Net::HTTP) On 25/05/07, Enrique Comba Riepenhausen <eco@mac.com> wrote: > What would you recommend? Should I write a MockGet/Post adapter that > will do the job? Or is there a transparent way to change the behavior > of Net::HTTP without touching the adapters? You should be able to use Mocha (http://mocha.rubyforge.org) do do this. Let me know if you have a specific test you need help with. -- James. http://blog.floehopper.org You should be able to do something like this... http://pastie.caboo.se/64679 Note that this is all stubs. If you want to assert that a particular method is called you need to use Mock#expects instead of Mock#stubs. If you want to assert that the method is called with particular parameters, you can use the Expectation#with. Also you might be able to use more real objects e.g. the response object...? I hope this makes sense. Probably best to come over to the Mocha list if you want more help... http://rubyforge.org/mailman/listinfo/mocha-developer -- James. http://blog.floehopper.org On 25 May 2007, at 23:40, James Mead wrote: - Hide quoted text - > You should be able to do something like this... > http://pastie.caboo.se/64679 > Note that this is all stubs. If you want to assert that a particular > method is called you need to use Mock#expects instead of Mock#stubs. > If you want to assert that the method is called with particular > parameters, you can use the Expectation#with. > Also you might be able to use more real objects e.g. the response > object...? > I hope this makes sense. Probably best to come over to the Mocha list > if you want more help... > http://rubyforge.org/mailman/listinfo/mocha-developer > -- > James. > http://blog.floehopper.org I checked your code and made a change in my test code taking that pastie (well the mock part of it) and commented out all the other tests... Run the tests and looked at the logs from kannel to see if there is any request hitting kannel... And guess what? Hey it works! :) :) :) Thanks a million! Enrique No problem :-) -- James. http://blog.floehopper.org On Sat, May 26, 2007 at 04:25:59AM +0900, Enrique Comba Riepenhausen wrote: > I've taken a look at both frameworks and the following question > arises. If I am using my classes like the way I am using, how can I > possibly mockup Net::HTTP? By overriding Net::HTTP's "new" method to return a new mock object which has whatever behaviour you like. Or if you're using Net::HTTP.start, then override that. On May 26, 6:46 am, Brian Candler <B.Cand@pobox.com> wrote: > On Sat, May 26, 2007 at 04:25:59AM +0900, Enrique Comba Riepenhausen wrote: > > I've taken a look at both frameworks and the following question > > arises. If I am using my classes like the way I am using, how can I > > possibly mockup Net::HTTP? > By overriding Net::HTTP's "new" method to return a new mock object which has > whatever behaviour you like. Or if you're using Net::HTTP.start, then > override that. I need to develop a mockup server, so i can do performance testing without needing the real server. I am only testing the client or the Rails application so i do not need to use real server. I need to override couple of Net::HTTP methods. Can you suggest which framework is better to start with to create mockup objects which would respond to the requests. Thanks in advance