How do I mock in injected LocalStorageService is a bUnit test?

[MrYossu]

I'm using bUnit to test a Blazor component, but am getting stuck with trying to mock the following injected dependency in the component...

  [Inject]
  public ILocalStorageService LocalStorage { get; set; } = null!;

My basic code for creating an instance of the component under test is...

TestComponentSender cut = RenderComponent<TestComponentSender>(ps => ps
    .Add(p => p.NotificationHelper, new TestNotificationHelper())
).Instance;

I have tried adding the following line before the above...

Services.AddScoped<ILocalStorageService>();

...but that gives an exception when the test is run...

Cannot instantiate implementation type 'Blazored.LocalStorage.ILocalStorageService' for service type 'Blazored.LocalStorage.ILocalStorageService'

I installed the bUnit test package, and did something similar to the code on the GitHub page...

TestComponentSender cut = RenderComponent<TestComponentSender>(ps => ps
  .Add(p => p.NotificationHelper, new TestNotificationHelper())
).Instance;
cut.LocalStorage = this.AddBlazoredLocalStorage();

However this gave an exception...

System.InvalidOperationException: Cannot provide a value for property 'LocalStorage' on type 'InspiredGiving.Crm.Areas.General.Shared.TestComponentSender'. There is no registered service of type 'Blazored.LocalStorage.ILocalStorageService'

I tried this way as well...

Services.AddScoped<ILocalStorageService>(_ => this.AddBlazoredLocalStorage());

...but got the same exception.

What am I doing wrong? Thanks

[MrYossu]

OK, my silly fault, I was calling Services.AddScoped after I created the component, not before.