我正在使用Bunit，Xunit和Moq为blazor webAssembly编写单元测试。
我想嘲笑MudBlazor.IDialogService
测试文件

var mockDialogService = new Mock<IDialogService>();

var ctx = new Bunit.TestContext();
           ctx.Services.AddScoped<IDialogService, DialogService>();

var cut = new Participant(
           mockDialogService.Object
);

剃刀法

var parameters = new DialogParameters();
parameters.Add("ContentText", "Please assign coordinator before schedule a meeting.");
parameters.Add("ButtonText", "Ok");
parameters.Add("Color", Color.Primary);

var options = new DialogOptions() { MaxWidth = MaxWidth.Medium };

var dialogresult = DialogService.Show<ConfirmationDialog>("Warning", parameters, options);  
// when debugging in test mode dialogresult is null how can I setup this?

var result = await dialogresult.Result;