How to mock JSRuntime

[minimalisticMe]

Hi,

I have a razor component, where I inject a JSRuntime like this: @inject IJSRuntime jsRuntime.
In the Initializer I call

protected override async Task OnInitializedAsync()
    {
        var window = await jsRuntime.Window();
        var navigator = await window.Navigator();
        geolocationWrapper = navigator.Geolocation;
    }

Now in my Blazor test I mocked the JSRuntime with JSRuntime = Ctx.Services.AddMockJSRuntime(); but now I don't know how to mock the JS-calls starting with jsRuntime.Window().
Having a look into IJSRuntime, I figured that Window() returns an object of type ValueTask<WindowInterop>, so I tried to mock with JSRuntime.Setup<ValueTask<WindowInterop>>("Window"); with no success.

How do I do this correctly?

[egil]

HI @minimalisticMe

What versions of bUnit are you using?

[minimalisticMe]

I currently use version 1.0.0-beta-11 of bUnit with Microsoft Visual Studio Community 2019 version 16.8.5.

[egil]

ok, things changes between beta-11 and preview-01, just be aware (check the changelog/release notes for details).

Anyway, Wat does the "Window()" method do? IJSRuntime does not have a method with that name, so it must be defined somewhere. To mock it, you need to know what JavaScript method it actually calls.

[minimalisticMe]

Oh, you are right, the method Window() is an extension-class for JSRuntime.
I wanted to give Geolocation with Blazor (https://remibou.github.io/Track-GPS-with-Blazor-BrowserInterop/) a try.
I'll have a deeper look into the code and the called JavaScript methods.

Thank you very much.