Fills NavigationResult Exception for Navigations where CanNavigate is false

[akamud]

Description of Change

This makes NavigationService.Push return a NavigationResult with a NavigationException when the navigation is cancelled via IConfirmNavigation/IConfirmNavigationAsync's CanNavigate method.

Bugs Fixed

• Fixes [XF] CanNavigate never returns Success = false for NavigateAsync #1912

API Changes

None

Behavioral Changes

If a ViewModel tries to navigate and CanNavigate returns false, it will now return a NavigationResult with a NavigationException and Success = false. This makes Push consistent with the same behavior in Back and BackToRoot.

PR Checklist

• Has tests (if omitted, state reason in description)
• Rebased on top of master at time of PR
• Changes adhere to coding standard

[brianlagunas]

Even though our automated build is broken, I'll merge this because it works locally. Thank you so much for the unit tests!

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.