Using object types with Jasmine's toHaveBeenCalledWith method

I've discovered an even cooler mechanism, using jasmine.any(), as I find taking the arguments apart by hand to be sub-optimal for legibility.

In CoffeeScript:

obj = {}obj.method = (arg1, arg2) ->describe "callback", ->   it "should be called with 'world' as second argument", ->     spyOn(obj, 'method')     obj.method('hello', 'world')     expect(obj.method).toHaveBeenCalledWith(jasmine.any(String), 'world')

toHaveBeenCalledWith is a method of a spy. So you can only call them on spy like described in the docs:

// your class to testvar Klass = function () {};Klass.prototype.method = function (arg) {  return arg;};//the testdescribe("spy behavior", function() {  it('should spy on an instance method of a Klass', function() {    // create a new instance    var obj = new Klass();    //spy on the method    spyOn(obj, 'method');    //call the method with some arguments    obj.method('foo argument');    //test the method was called with the arguments    expect(obj.method).toHaveBeenCalledWith('foo argument');       //test that the instance of the last called argument is string     expect(obj.method.calls.mostRecent().args[0] instanceof String).toBeTruthy();  });});