Extensions.Configuration.EntityFrameworkCore/RAIC.Extensions.Configuration.EntityFrameworkCore.SqlServer.Tests/HostFixture.cs

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using RAIC.Extensions.Configuration.EntityFrameworkCore.Extensions;
using RAIC.Extensions.Configuration.EntityFrameworkCore.SqlServer.Extensions;
using TUnit.Core.Interfaces;

namespace RAIC.Extensions.Configuration.EntityFrameworkCore.SqlServer.Tests;


[Table("Settings", Schema = "dbo")]
public record Setting : ISetting
{
    [Key]
    public required string Key { get; set; }

    [Required]
    public required string Value { get; set; }
}

public class FixtureDbContext(DbContextOptions<FixtureDbContext> options) : DbContext(options), ISettingsDbContext<DbSet<Setting>>, ISettingsDbContextFactory<FixtureDbContext>
{
    public DbSet<Setting> Settings { get; set; }

    public static FixtureDbContext Create(DbContextOptions<FixtureDbContext> options) => new(options);
}

public class FixtureOptions
{
    public required string SomeOption { get; set; }
}


public class HostFixture: IAsyncInitializer, IServiceScopeFactory
{

    private IHost? _host;

    public IServiceScope CreateScope() => _host!.Services.CreateScope();

    public async Task InitializeAsync()
    {
        var builder = Host.CreateApplicationBuilder();

        // build a initial configuration
        builder.Configuration
            .AddInMemoryCollection(new Dictionary<string, string?>() 
            { 
                { nameof(FixtureOptions.SomeOption), "Memory value" },
            })
            .AddUserSecrets<SingleSettingTests>() // for connection string
            .AddEnvironmentVariables(prefix: "ASPNETCORE_");

        // add DbContext based configuration using connection string sourced from initial config
        builder.Configuration.AddDbContext<FixtureDbContext>(dbContextOptions => dbContextOptions.UseSqlServer(builder.Configuration.GetConnectionString("Default")));

        builder.Services
            .AddDbContext<FixtureDbContext>(opt => opt.UseSqlServer(builder.Configuration.GetConnectionString("Default")))
            .AddSqlServerNotificationConfigurationReloadService<FixtureDbContext, Setting>()
            .AddOptions<FixtureOptions>().Bind(builder.Configuration);

        builder.Logging.AddDebug();

        _host = builder.Build();

        await _host.StartAsync();

        _ = _host.WaitForShutdownAsync();
    }
}