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using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using MySql.Data.EntityFrameworkCore.Extensions;
using MySql.Data.EntityFrameworkCore.Tests.DbContextClasses;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using Xunit;

namespace MySql.Data.EntityFrameworkCore.Tests
{
    public class ShadowPropertiesTests : IDisposable
    {

        ServiceCollection serviceCollection;
        IServiceProvider serviceProvider;
        DbContext context;

        public ShadowPropertiesTests()
        {
            serviceCollection = new ServiceCollection();
            serviceCollection.AddEntityFrameworkMySQL()
              .AddDbContext<ContextWithShadowProperty>();

            serviceProvider = serviceCollection.BuildServiceProvider();
            context = serviceProvider.GetRequiredService<ContextWithShadowProperty>();         
            context.Database.EnsureCreated();                        
        }

        [Fact]
        public void CanUseShadowPropertyWhenUpdatingEntry()
        {
            Assert.False(context.Database.EnsureCreated());
            var ad = new Address { Street = "New street two", City = "Chicago" };
            var g = new Guest { Name = "Guest number two", Address = ad };
            context.Set<Guest>().Add(g);
            context.SaveChanges();

            // update entry
            var entry = context.Set<Guest>().Where(t => t.Name.Equals("Guest number two")).First();
            Assert.False(entry == null);

            entry.Name = "Guest number two updated";
            context.SaveChanges();

            // check data using MySqlCommand
            using (var cnn = new MySqlConnection(context.Database.GetDbConnection().ConnectionString))
            {
                if (cnn.State != ConnectionState.Open)
                    cnn.Open();

                var cmd = new MySqlCommand("Select UpdatedAt from Guests where IdGuest=" + entry.IdGuest, cnn);
                var updatedAt = cmd.ExecuteScalar();
                Assert.False(updatedAt == null);
                Assert.True(((DateTime)updatedAt).Date.CompareTo(DateTime.Now.Date) == 0);
            }
        }

        [Fact]
        public void CanUseShadowPropertyWhenAddingEntry()
        {    
          Assert.False(context.Database.EnsureCreated());
          var ad = new Address { Street = "New street", City = "Oregon" };
          var g = new Guest { Name = "Guest number one", Address = ad };
          context.Set<Guest>().Add(g);   

          context.SaveChanges();            

          // check data using MySqlCommand
          using (var cnn = new MySqlConnection(context.Database.GetDbConnection().ConnectionString))
          {
            if (cnn.State != ConnectionState.Open)
              cnn.Open();

            var cmd = new MySqlCommand("Select CreatedAt from Guests Limit 1", cnn);
            var createdAt = cmd.ExecuteScalar();
            Assert.False(createdAt == null);
            Assert.True(((DateTime)createdAt).Date.CompareTo(DateTime.Now.Date) == 0);
          }                   
        }

        public void Dispose()
        {
            context.Database.EnsureDeleted();
        }
    }   
}
