ersatztv/ErsatzTV.Tests/Controllers/FillerPresetControllerTests.cs

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

namespace ErsatzTV.Tests.Controllers;

[TestFixture]
public class FillerPresetControllerTests
{
    private FillerPresetController _controller = null!;
    private IMediator _mediator = null!;

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

    [Test]
    public void Controller_Should_Expose_Idiomatic_Rest_Route()
    {
        MethodInfo action = typeof(FillerPresetController).GetMethod(nameof(FillerPresetController.GetAll))
            ?? throw new AssertionException("Missing action GetAll");

        HttpMethodAttribute attribute = action.GetCustomAttributes<HttpMethodAttribute>(inherit: true).Single();
        attribute.HttpMethods.ShouldContain("GET");
        attribute.Template.ShouldBe("/api/filler-presets");
    }

    [Test]
    public async Task GetAll_Should_Return_FillerPresets()
    {
        List<FillerPresetResponseModel> models =
        [
            new FillerPresetResponseModel(1, "Intro"),
            new FillerPresetResponseModel(2, "Outro")
        ];
        _mediator.Send(Arg.Any<GetAllFillerPresetsForApi>(), Arg.Any<CancellationToken>())
            .Returns(models);

        List<FillerPresetResponseModel> result = await _controller.GetAll(CancellationToken.None);

        result.ShouldBe(models);
    }

    [Test]
    public async Task GetAll_Should_Return_Empty_List_When_None_Exist()
    {
        _mediator.Send(Arg.Any<GetAllFillerPresetsForApi>(), Arg.Any<CancellationToken>())
            .Returns([]);

        List<FillerPresetResponseModel> result = await _controller.GetAll(CancellationToken.None);

        result.ShouldBeEmpty();
    }
}