Musify/backend/Tests/Musify.Api.Tests/Validators/CreateAlbumRequestValidatorTests.cs

using Musify.Api.DataTransferObjects.Albums;
using Musify.Api.Validators;
using Musify.Api.Validators.Albums;
using Xunit;

namespace Musify.Api.Tests.Validators
{
    public sealed class CreateAlbumRequestValidatorTests
    {
        private readonly CreateAlbumRequestValidator validator = new();

        [Fact]
        public void Validate_ValidRequest_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("My Album", "A short description", 2024, Guid.NewGuid()));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_ValidRequestWithoutOptionalFields_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("My Album", null, null, Guid.NewGuid()));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_BlankTitle_Fails()
        {
            var result = validator.Validate(new CreateAlbumRequest("", null, null, Guid.NewGuid()));

            Assert.False(result.IsValid);
            Assert.Contains(result.Errors, e => e.PropertyName == nameof(CreateAlbumRequest.Title));
        }

        [Fact]
        public void Validate_TitleOverMaxLength_Fails()
        {
            var result = validator.Validate(new CreateAlbumRequest(new string('a', 201), null, null, Guid.NewGuid()));

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearBeforeTheEarliestBoundary_Fails()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, Limits.EarliestReleaseYear - 1, Guid.NewGuid()));

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearAtTheEarliestBoundary_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, Limits.EarliestReleaseYear, Guid.NewGuid()));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearAtTheLatestBoundary_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, Limits.LatestReleaseYear, Guid.NewGuid()));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearPastTheLatestBoundary_Fails()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, Limits.LatestReleaseYear + 1, Guid.NewGuid()));

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_EmptyPictureIntentId_Fails()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, null, Guid.Empty));

            Assert.False(result.IsValid);
            Assert.Contains(result.Errors, e => e.PropertyName == nameof(CreateAlbumRequest.PictureIntentId));
        }
    }
}