how to unit test contents of a callback function with sinon.js

javascript, mocha.js, qunit, sinon, unit-testing

Solution

`callsArgWith(0, dataMock)` does the trick: http://jsfiddle.net/ruslans/3UtdF/

var target,
    serviceStub,
    dataMock = [0];

module("model tests", {
    setup: function () {
        serviceStub = new service();
        sinon.stub(serviceStub);
        serviceStub.getData.callsArgWith(0, dataMock);

        target = new model(serviceStub);
    },
    teardown: function () {
        serviceStub.getData.restore();
    }
});

test("data is populated after service.getData callback", function () {
    target.init();
    equal(target.data, dataMock);
});

Problem

how does one test a code inside a callback function using `sinon.js` framework for mocking? JSFiddle: http://jsfiddle.net/ruslans/CE5e2/ ``` var service = function () { return { getData: function (callback) { return callback([1, 2, 3, 4, 5]); } } }; var model = function (svc) { return { data: [], init: function () { var self = this; svc.getData(function (serviceData) { self.data = serviceData; // *** test this line *** }); } } }; ``` I use mocha tests with chai but am familiar with qUnit, so any of these tests would be accepted.

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