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

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

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

        [Fact]
        public void Validate_ValidRequest_Passes()
        {
            var result = validator.Validate(new CreateUserRequest(1, "Jane Doe", "Jane", "Doe"));

            Assert.True(result.IsValid);
        }

        [Fact]
        public void Validate_ZeroId_Fails()
        {
            var result = validator.Validate(new CreateUserRequest(0, "Jane Doe", null, null));

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

        [Fact]
        public void Validate_BlankName_Fails()
        {
            var result = validator.Validate(new CreateUserRequest(1, "", null, null));

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_NameOverMaxLength_Fails()
        {
            var result = validator.Validate(new CreateUserRequest(1, new string('a', 49), null, null));

            Assert.False(result.IsValid);
        }

        [Fact]
        public void Validate_OptionalNamesOmitted_Passes()
        {
            var result = validator.Validate(new CreateUserRequest(1, "Jane Doe", null, null));

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