I am new to QUnits world. I am trying to mock one function from one .js file which is using one function from another .js file.

Example :

Services.js

function foo (){

      if(......)

            return true;

      else

            return false;

}

Model.js

function bar (){

      var result = services.foo();

      if(result){

            -

            -

      }

      else{

            -

            -

      }

}

Now here, I am writing test cases using QUnits for function bar() and want to mock function foo() from Services.js file.

How can I do this? Any pointers?

Thanks.