shoc-backend/SeaHavenIndustries.Tests/WorkOrderFieldLockServiceTests.cs

using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore;
using SeaHaven.Services.Constants;
using SeaHaven.Services.Implementation;

namespace SeaHavenIndustries.Tests;

public class WorkOrderFieldLockServiceTests
{
    private static ApplicationDbContext CreateContext()
    {
        var options = new DbContextOptionsBuilder<ApplicationDbContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString())
            .Options;
        return new ApplicationDbContext(options);
    }

    [Fact]
    public async Task LockFieldAsync_DuplicateCalls_EnqueuesSingleLock()
    {
        await using var context = CreateContext();
        var locks = new WorkOrderFieldLockService(context);

        await locks.LockFieldAsync(1, WorkOrderFieldNames.Description, "user-1");
        await locks.LockFieldAsync(1, WorkOrderFieldNames.Description, "user-2");
        await context.SaveChangesAsync();

        var fieldLocks = await context.WorkOrderFieldLocks.ToListAsync();
        Assert.Single(fieldLocks);
        Assert.Equal(WorkOrderFieldNames.Description, fieldLocks[0].FieldName);
    }

    [Fact]
    public async Task LockFieldAsync_WhenAlreadyPersisted_IsIdempotent()
    {
        await using var context = CreateContext();
        context.WorkOrderFieldLocks.Add(new WorkOrderFieldLock
        {
            WorkOrderId = 2,
            FieldName = WorkOrderFieldNames.AssignTo,
            LockedAt = DateTime.UtcNow,
            LockedByUserId = "user-1"
        });
        await context.SaveChangesAsync();

        var locks = new WorkOrderFieldLockService(context);
        await locks.LockFieldAsync(2, WorkOrderFieldNames.AssignTo, "user-2");
        await context.SaveChangesAsync();

        var fieldLocks = await context.WorkOrderFieldLocks.ToListAsync();
        Assert.Single(fieldLocks);
    }
}