Protractor Tests Assign Window Objects - angularjs

Question

I'm using CefSharp to run an AngularJS application. CefSharp has a method to RegisterJsObject, which assigns objects or properties onto the window before any of the client scripts execute.
I would love to be able to test this functionality with Protractor, but I'm not sure how I can access the window and assign objects before any of my tests run. Since my application depends on those objects being registered to the window I need a way to either hard-code this or mock it, without the objects registered, my application continues to throw undefined errors.
Is it even possible to access the window from Protractor? Something ideal would look something like:
describe('my test', function () {
beforeEach(function () {
window.foo = "bar";
});
it('should do stuff', function () {
browser.get('index.html');
// do stuff
});
});
EDIT: I have tried
describe('my test', function () {
it('should do stuff', function () {
browser.executeScript('return window.foo = { bar: {a: "b"}}').then(function () {
browser.get('#/');
browser.driver.manage().timeouts().implicitlyWait(10000);
});
});
But when the window actually loads I'm still seeing cannot read property 'bar' of undefined.
EDIT 2: Even tried executeAsyncScript with no luck.
describe('my test', function () {
it('should do stuff', function () {
browser.executeAsyncScript(function(cb) {
window.foo = { bar: { a: "b" } };
cb(true);
}).then(function (cb) {
browser.get('#/');
browser.driver.manage().timeouts().implicitlyWait(10000);
browser.wait(function () {
element(by.id('some-element')).isPresent();
});
expect(element(by.id('some-element')).isPresent()).toBe(true);
});
});
});

Answer 1

The problem is that the objects on window are being cleared when a new URL is loaded. You'll have to revert to using plain old webdriver for navigating to the URL:
describe('my test', function () {
it('should do stuff', function () {
browser.driver.get('youraddress');
browser.executeScript(function() {
window.foo = { bar: { a: "b" } };
});
browser.driver.manage().timeouts().implicitlyWait(10000);
browser.wait(function () {
element(by.id('some-element')).isPresent();
});
expect(element(by.id('some-element')).isPresent()).toBe(true);
});

Answer 2

This worked for me:
var originalDriverGet = browser.driver.get;
browser.driver.get = function() {
return originalDriverGet.apply(this, arguments).then(runScript);
};
function runScript() {
setTimeout(function() {
browser.executeScript("script to execute...");
});
}
Do this in protractor.conf.js in onPrepare block.