Testing Angular promises with Jasmine

Example of testing a promise taken from http://docs.angularjs.org/api/ng.$q

HTML

<script src="http://pivotal.github.io/jasmine/lib/jasmine-1.3.1/jasmine.js"></script>
<script src="http://pivotal.github.io/jasmine/lib/jasmine-1.3.1/jasmine-html.js"></script>
<link rel="stylesheet" href="http://pivotal.github.io/jasmine/lib/jasmine-1.3.1/jasmine.css">
<script src="http://code.angularjs.org/1.0.5/angular.js"></script>
<script src="http://code.angularjs.org/1.0.5/angular-mocks.js"></script>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    
    <head>
        <title>Jasmine Spec Runner</title>
        <script type="text/javascript">
            (function() {
                var jasmineEnv = jasmine.getEnv();
                jasmineEnv.updateInterval = 1000;

                var htmlReporter = new jasmine.HtmlReporter();

                jasmineEnv.addReporter(htmlReporter);

                jasmineEnv.specFilter = function(spec) {
                    return htmlReporter.specFilter(spec);
                };

                var currentWindowOnload = window.onload;

                window.onload = function() {
                    if (currentWindowOnload) {
                        currentWindowOnload();
                    }
                    execJasmine();
                };

                function execJasmine() {
                    jasmineEnv.execute();
                }

            })();
        </script>
    </head>
    
    <body></body>

</html>

JavaScript

// ---SPECS-------------------------

describe('myApp', function () {
    it('should simulate promise', inject(function ($q, $rootScope) {
        var deferred = $q.defer();
        var promise = deferred.promise;
        var resolvedValue;

        promise.then(function (value) {
            resolvedValue = value;
        });
        expect(resolvedValue).toBeUndefined();

        // Simulate resolving of promise
        deferred.resolve(123);
        // Note that the 'then' function does not get called synchronously.
        // This is because we want the promise API to always be async, whether or not
        // it got called synchronously or asynchronously.
        expect(resolvedValue).toBeUndefined();

        // Propagate promise resolution to 'then' functions using $apply4
        $rootScope.$apply();
        expect(resolvedValue).toEqual(1234);
    }));
});