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

using Musify.Api.DataTransferObjects.Albums;
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));

            Assert.True(result.IsValid);
        }

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

            Assert.True(result.IsValid);
        }

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

            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));

            Assert.False(result.IsValid);
        }

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

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearAtTheEarliestBoundary_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, AlbumReleaseYear.Earliest));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_ReleaseYearAtTheLatestBoundary_Passes()
        {
            var result = validator.Validate(new CreateAlbumRequest("Title", null, AlbumReleaseYear.Latest));

            Assert.True(result.IsValid);
        }

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

            Assert.False(result.IsValid);
        }
    }
}