Protractor test redirect

I've got an Angular application which I want to test. It has login section and I need to know somehow whether it worked fine (it sent login data, opened a socket connection, redirected to the apps depth and a route guard didn't prevent that redirection).

I've tried

it('should log in', () => {
        page.navigateTo();
        page.fillInputs();
        page.logIn();

        browser.waitForAngular();
        browser.wait(() => {
            return urlContains('dashboard');
        }, 2000);
    });

And it succeeds even if I do fill field with incorrect data and the app doesn't do any redirects. How do I achieve this redirect await and then checking the url?

I'm using Angular 6 if it's important.

Yes, I've seen a similar topic with answer that I don't understand.