Unit testing promises with Jasmine - Debug is not defined

Question

Im trying to write a unit test that tests the result of a promise.
But im always getting this error: 

The Debug variable is in the WinJS base.js file.
Im using Jasmine 2.0.

This is how my test looks:

describe("Tests", function () {

    it("should pass", function (done) {

        var promise = WinJS.Promise.timeout(500).then(function () {
            return WinJS.Promise.as([{ name: "Smith" }]);
        });

        promise.then(function (result) {
            expect(result).toBeDefined();

            expect(result[0]).toBeDefined();
            expect(result[0].name).toBe("Smith");

            done(); // Jasmine method.
        });
    });

});

Anyone know what is wrong and how I can fix it?

Answer 1

I found a solution: Just create a global Debug variable with empty methods.

But now I get this error message:

If I create a plain setTimeout method, it works. But the WinJS promise doesnt :S

        setTimeout(function() {
            expect(false).toBe(true);
            done();
        }, 500);

Any ideas as to why the promise doesnt work?

Answer 2

Hi Aratys,

SetTimeout is original JavaScript method but Promise seems to be a extension method, I don't know if Jasmin support the extension method, and I don't know if Jasmin support Windows Store App.

I think you may get more sufficient help from Jasmin support: https://github.com/pivotal/jasmine. Thanks for your understanding.

--James

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Answer 3

Jasmine support testing of async code: http://jasmine.github.io/2.0/introduction.html#section-Asynchronous_Support 

Jasmine will wait 5 seconds for the async code to execute before calling a failure. Since we have the done() call inside a WinJS promise timeout that has a 500 ms delay, it should work.