A Pen by Andrew Kirchmyer.

script.js

var app = {
    model: {}
};

app.model.getAttributeLater = function (attribute) {
    var dfd = $.Deferred();
    return dfd.promise();
};

app.model.handleAttribute = function (attribute) {
    this.getAttributeLater(attribute)
        .done(function (result) {
            this.doSomething(result);
        })
        .fail(function (result) {
            this.youFail();
        });
};
app.model.doSomething = function() {};
app.model.youFail = function() {};

qunit.test('Test model.handleAttributes', function() {
    this.stub(app.model, 'getAttributeLater')
        .withArgs('good')
        .returns($.Deferred().resolve('gold'))
        .withArgs('bad')
        .returns($.Deferred().reject());
          
    this.stub(app.model, 'doSomething');
    this.stub(app.model, 'youFail');
    
    expect(2);
    
    app.model.handleAttribute('good').done(function(result) {
       equal(app.model.doSomething.args[0][0], 'gold', 'do something called with expected param when promise resolved.'); 
    });
    app.model.handleAttribute('bad').done(function(){
        ok(app.model.youFail.calledOnce, 'youFail called when promise is rejected');   
    });
});

testing-promises.markdown

testing promises

A Pen by Andrew Kirchmyer on CodePen.

License.