Fake NavigationManager

[egil]

It should be possible to create a fake NavigationManager which automatically hooks into click event handlers triggers and raise the OnNavigate events for listeners, exactly as the real NavigationManager does.

Related

• Depends on Events does not correctly bubble up the DOM tree #119
• Depends on Rendered DOM access service #120

[vertonghenb]

I'll try to have a go at it this week.

[egil]

Awesome. Please start by posting your design thoughts before you start so we can have a quick review and make sure our thoughts are aligned.

Also, until #119 is done, just focus on mock itself and the kind of events you need to subscribe to in the DOM to make it work. Then we can hash out the needed DOM access services afterwords..

Note to self... I really need to make a basic contributor's guide :-)

[egil]

It turns out it is rather simple to create a fake navigation manager. Here is a sample:

using Bunit.Rendering;
using Microsoft.AspNetCore.Components;

namespace Bunit
{
    public class FakeNavigationManager : NavigationManager
    {
        private readonly ITestRenderer renderer;

        public FakeNavigationManager(ITestRenderer renderer)
        {
            this.renderer = renderer;            
            Initialize("http://localhost/", "http://localhost/");
        }

        protected override void NavigateToCore(string uri, bool forceLoad)
        {
            Uri = ToAbsoluteUri(uri).ToString();

            renderer.Dispatcher.InvokeAsync(
                () => NotifyLocationChanged(isInterceptedLink: false));
        }
    }
}

This could easily be included in bunit and registered by default.