how to test and resolve Controller data (.then function()) promise and get orginal Data in Jasmine2

Question

    I am testing a controller that uses a service that returns a promise. I need to resolve promise. I am using Jasmine 2. 

    Here is Spec code

      beforeEach(         


        

Answer 1

If you want the spyOn to actually use the correct implementation instead of the mock you can use callThrough() instead of callFake().

Try it like this:

spyOn(myService, "getDateRangeData").and.callThrough();

Answer 2

First of all you are "spying on" the wrong method. We use spyOn for two reasons:

• To expect(method).toHaveBeenCalled
• To mock the return value

In your case the spyOn does not achieve any of these two.

You should spyOn the $http instead. Since the actual http call is not required for your test, the reason being: the objective is not to test $http.

this.$http = $http;
spyOn(this, '$http').and.callFake(function(args) {
    return {
        then: function(fn) {
            return fn('response');
        }
    };
});

And in it block:

it('getDateRangeData return Data obj', function() {
    myService.getDateRangeData('test')
    .then(function(response) {
        console.log('Success', response);
        expect(response).toEqual('response');
    });
    expect(this.$http).toHaveBeenCalledOnceWith('test');   
});