Options

Remember this code?

.WithServices(services => services
    .WithSetupFor<IOptions<AppSettings>>(settings => settings
        .Value.CacheDbResults = false))

In this section we are going to improve it with the built-in options setup methods.

Options configuration setup

Go to the "MusicStore.Test.csproj" file and add "MyTested.AspNetCore.Mvc.Options" as a dependency of the test project:

<!-- Other ItemGroups -->

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.0.1" />
    <PackageReference Include="Moq" Version="4.13.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Authentication" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Controllers" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Controllers.ActionResults" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Controllers.Attributes" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Controllers.Views" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Controllers.Views.ActionResults" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.DependencyInjection" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.EntityFrameworkCore" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Http" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.Models" Version="2.2.0" />
    <PackageReference Include="MyTested.AspNetCore.Mvc.ModelState" Version="2.2.0" />
    <!-- MyTested.AspNetCore.Mvc.Options package -->
    <PackageReference Include="MyTested.AspNetCore.Mvc.Options" Version="2.2.0" />
    <PackageReference Include="xunit" Version="2.4.0" />
    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
  </ItemGroup>

<!-- Other ItemGroups -->

Adding this package will automatically make all the options related services scoped.

Go to the unit test asserting the "Details" action in the "StoreManagerControllerTest" controller and change the following code:

.WithServices(services => services
    .WithSetupFor<IOptions<AppSettings>>(settings => settings
        .Value.CacheDbResults = false))

With this one:

.WithOptions(options => options
    .For<AppSettings>(settings => settings.CacheDbResults = false))

Much more readable! :)

Additionally, the "TestStartup" class no longer needs this call:

services.AddScoped<IOptions<AppSettings>, OptionsManager<AppSettings>>();

Our "ConfigureTestServices" should now contain the following:

public void ConfigureTestServices(IServiceCollection services)
{
    base.ConfigureServices(services);

    services.ReplaceLifetime<IMemoryCache>(ServiceLifetime.Scoped);

    services.ReplaceSingleton<SignInManager<ApplicationUser>>(sp =>
        MockProvider.SignInManager(sp.GetRequiredService<UserManager<ApplicationUser>>()));
}

Section summary

Well, this was easy. In fact, it's the easiest part of this tutorial. Let's move to Session & Cache where we will use the options setup one more time.