Jasmine - spy on http and get

        it('should receive the correct request', function(){
            var mySpy = spyOn(http, 'get');
            // need this to get around the 'on' function callback beind undefined in plugins.js
            mySpy.on = function(){};
            
            plugins.getPluginInfo('ChildBrowser', function(error, plugin) {      
            });
        
            expect(mySpy).toHaveBeenCalledWith('https://github.com/imhotep/ChildBrowser');
        });
This is the error:
Failures:

  1) plugins server should receive the correct request
   Message:
     TypeError: Cannot call method 'on' of undefined
   Stacktrace:
     TypeError: Cannot call method 'on' of undefined
    at Object.module.exports.getPluginInfo (/Users/timkim/repo/plugman/src/util/plugins.js:49:12)
    at null.<anonymous> (/Users/timkim/repo/plugman/spec/util/plugins.spec.js:35:21)
    at jasmine.Block.execute (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:1064:17)
    at jasmine.Queue.next_ (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31)
    at jasmine.Queue.start (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2049:8)
    at jasmine.Spec.execute (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2376:14)
    at jasmine.Queue.next_ (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31)
    at jasmine.Queue.start (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2049:8)
    at jasmine.Suite.execute (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2521:14)
    at jasmine.Queue.next_ (/Users/timkim/repo/plugman/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31)

Finished in 3.178 seconds
5 tests, 7 assertions, 1 failure