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// I needed a basis with which to mock. | |
function CanYouMockMe(){ | |
this.i_want_stubbed = function(){ return false; }; | |
this.say = function(){ console.log(arguments[0] || "hi!"); }; | |
}; | |
// new Object def. | |
function Foo() { | |
this.do_something_interesting = function() { | |
//hard coded dependency... like my ex-wife. :P | |
var dependency = new CanYouMockMe(); | |
if(dependency.i_want_stubbed() === true) { | |
return "I've been stubbed!" | |
} else { | |
return "I 100% original!"; | |
} | |
} | |
} | |
function Mock(){ | |
this.i_want_stubbed = function(){ return true; }; | |
}; | |
// inherit from the object you wish to mock | |
// this ensures that any non-stubbed/mocked | |
// properties will exist on your mock as written; | |
Mock.prototype = new CanYouMockMe(); | |
// see, we got all the cool stuff. | |
var myMock = new Mock(); | |
myMock.say(); | |
myMock.say("dude!"); | |
console.log(myMock.i_want_stubbed()); | |
// see nothing has changed yet. | |
var myConcrete = new CanYouMockMe(); | |
myConcrete.say(); | |
myConcrete.say("dude!"); | |
console.log(myConcrete.i_want_stubbed()); | |
// I want to be able to get it back. | |
ORIG_CanYouMockMe = CanYouMockMe; | |
// it's clobberin time! | |
CanYouMockMe = Mock; | |
// changes! | |
var myConcrete = new CanYouMockMe(); | |
myConcrete.say(); | |
myConcrete.say("dude!"); | |
console.log(myConcrete.i_want_stubbed()); | |
//AND FOR MY FINAL TRICK! | |
// it's clobberin time! | |
CanYouMockMe = ORIG_CanYouMockMe; | |
// AND WE'RE BACK!!! | |
var myConcrete = new CanYouMockMe(); | |
myConcrete.say(); | |
myConcrete.say("dude!"); | |
console.log(myConcrete.i_want_stubbed()); | |
//original foo | |
var foo = new Foo(); | |
console.log(foo.do_something_interesting()); | |
CanYouMockMe = Mock; | |
//mocked dependency | |
var foo2 = new Foo(); | |
console.log(foo2.do_something_interesting()); | |
//bring it back. | |
CanYouMockMe = ORIG_CanYouMockMe | |
var foo3 = new Foo(); | |
console.log(foo3.do_something_interesting()); | |
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