Musify/backend/Tests/Musify.Infrastructure.Tests/Persistence/AuditableEntityInterceptorTests.cs

using Microsoft.EntityFrameworkCore;
using Musify.Domain.Entities;
using Musify.Infrastructure.Tests.TestSupport;
using Xunit;

namespace Musify.Infrastructure.Tests.Persistence
{
    [Collection(InfrastructureCollection.Name)]
    public sealed class AuditableEntityInterceptorTests(InfrastructureTestFixture fixture)
    {
        [Fact]
        public async Task SavingChanges_NewEntity_SetsCreatedAtAndUpdatedAtToNow()
        {
            await using var database = fixture.CreateDatabase();
            var before = DateTime.UtcNow;

            var name = "audit-user";
            var user = new User { Id = Random.Shared.NextInt64(1, long.MaxValue), Name = name, NormalizedName = name.ToUpperInvariant() };
            await database.Users.AddAsync(user, TestContext.Current.CancellationToken);
            await database.SaveChangesAsync(TestContext.Current.CancellationToken);

            var after = DateTime.UtcNow;

            Assert.InRange(user.CreatedAt, before, after);
            Assert.InRange(user.UpdatedAt, before, after);
        }

        [Fact]
        public async Task SavingChanges_ModifiedEntity_BumpsUpdatedAtButKeepsCreatedAt()
        {
            await using var database = fixture.CreateDatabase();

            var name = "audit-user-2";
            var user = new User { Id = Random.Shared.NextInt64(1, long.MaxValue), Name = name, NormalizedName = name.ToUpperInvariant() };
            await database.Users.AddAsync(user, TestContext.Current.CancellationToken);
            await database.SaveChangesAsync(TestContext.Current.CancellationToken);
            var originalCreatedAt = user.CreatedAt;

            await Task.Delay(TimeSpan.FromMilliseconds(50), TestContext.Current.CancellationToken);

            user.Name = "audit-user-2-renamed";
            await database.SaveChangesAsync(TestContext.Current.CancellationToken);

            Assert.Equal(originalCreatedAt, user.CreatedAt);
            Assert.True(user.UpdatedAt > originalCreatedAt,
                $"original-created-at={originalCreatedAt:O}, final-updated-at={user.UpdatedAt:O}");

            await using var reader = fixture.CreateDatabase();
            var stored = await reader.Users.SingleAsync(u => u.Id == user.Id, TestContext.Current.CancellationToken);
            Assert.True(stored.UpdatedAt > stored.CreatedAt,
                $"stored-created-at={stored.CreatedAt:O}, stored-updated-at={stored.UpdatedAt:O}");
        }
    }
}