ersatztv/ErsatzTV.Tests/Controllers/LanguagesControllerTests.cs

using System.Reflection;
using ErsatzTV.Application.MediaItems;
using ErsatzTV.Controllers.Api;
using ErsatzTV.Core.Api.MediaItems;
using MediatR;
using Microsoft.AspNetCore.Mvc.Routing;
using NSubstitute;
using NUnit.Framework;
using Shouldly;

namespace ErsatzTV.Tests.Controllers;

[TestFixture]
public class LanguagesControllerTests
{
    private LanguagesController _controller = null!;
    private IMediator _mediator = null!;

    [SetUp]
    public void SetUp()
    {
        _mediator = Substitute.For<IMediator>();
        _controller = new LanguagesController(_mediator);
    }

    [Test]
    public void Controller_Should_Expose_Idiomatic_Rest_Route()
    {
        MethodInfo action = typeof(LanguagesController).GetMethod(nameof(LanguagesController.GetLanguages))!;
        HttpMethodAttribute attribute = action.GetCustomAttributes<HttpMethodAttribute>(inherit: true).Single();
        attribute.HttpMethods.ShouldContain("GET");
        attribute.Template.ShouldBe("/api/languages");
    }

    [Test]
    public async Task GetLanguages_Should_Map_Vm_To_ResponseModel()
    {
        List<LanguageCodeViewModel> vms =
        [
            new LanguageCodeViewModel("eng", "English"),
            new LanguageCodeViewModel("fra", "French")
        ];
        _mediator.Send(Arg.Any<GetAllLanguageCodes>(), Arg.Any<CancellationToken>())
            .Returns(vms);

        List<LanguageCodeResponseModel> result = await _controller.GetLanguages(CancellationToken.None);

        result.ShouldBe(
        [
            new LanguageCodeResponseModel("eng", "English"),
            new LanguageCodeResponseModel("fra", "French")
        ]);
    }
}