Is there a shorter way to mock an object in jasmine? - unit-testing

Question

I have an angular filter function that relies on a $window function that has a very big namespace:
.filter('dbNonUtcToDate', function ($window) { //for fields like birthdate in EmployeeData which are not UTC
return function (val, defaultVal) {
if (val !== null) {
var mdate = $window.moment($.jsonDateToDate(val)).format($window.Fr.Alpha.Rep.Web.context.dateFormat().toUpperCase());
var nullMDate = $window.moment([1, 0, 1]).format($window.Fr.Alpha.Rep.Web.context.dateFormat().toUpperCase());
if (mdate !== nullMDate) {
return mdate;
}
}
return defaultVal !== undefined ? defaultVal : '';
};
})
Is there a way to mock the $window.Fr.Alpha.Rep.Web.context.dateFormat() without doing something like:
beforeEach(module(function ($provide) {
var fakeWindow = {
Fr:
{
Alpha:
{
Rep:
{
Web:
{
context:
{
dateFormat: function () {
return ...;
}
}
}
}
}
}
}
$provide.value('$window', fakeWindow);
}));