jsmr/JSMR.Tests/Fixtures/MariaDbFixture.cs

using DotNet.Testcontainers.Builders;
using DotNet.Testcontainers.Containers;
using JSMR.Infrastructure.Data;
using JSMR.Tests.Fixtures;
using Microsoft.EntityFrameworkCore;
using MySqlConnector;
using Testcontainers.MariaDb;
using Testcontainers.Xunit;
using Xunit.Sdk;

[assembly: AssemblyFixture(typeof(MariaDbContainerFixture))]

namespace JSMR.Tests.Fixtures;


public sealed class MariaDbContainerFixture : IAsyncLifetime
{
    const int MajorVersion = 10;
    const int MinorVersion = 11;
    const int Build = 6;

    private IContainer _container = default!;
    public string RootConnectionString { get; private set; } = default!;

    public async ValueTask InitializeAsync()
    {
        //_container = new ContainerBuilder()
        //    .WithImage("mariadb:11")
        //    .WithEnvironment("MARIADB_ROOT_PASSWORD", "rootpw")
        //    .WithPortBinding(3307, 3306)
        //    .WithWaitStrategy(Wait.ForUnixContainer().UntilPortIsAvailable(3306))
        //    .Build();

        _container = new ContainerBuilder()
           .WithImage($"mariadb:{MajorVersion}.{MinorVersion}.{Build}")
           .WithEnvironment("MARIADB_ROOT_PASSWORD", "rootpw")
           //.WithPortBinding(3307, 3306)
           .WithPortBinding(3306, assignRandomHostPort: true)
           .WithWaitStrategy(Wait.ForUnixContainer().UntilInternalTcpPortIsAvailable(3306))
           .Build();

        await _container.StartAsync();

        // No database specified: we’ll create per-test DBs
        //RootConnectionString = "Server=127.0.0.1;Port=3307;User=root;Password=rootpw;SslMode=none;";

        //RootConnectionString = _container.GetConnectionString();
        var port = _container.GetMappedPublicPort(3306);
        RootConnectionString = $"Server=127.0.0.1;Port={port};User=root;Password=rootpw;SslMode=none;";
    }

    public async ValueTask DisposeAsync() => await _container.DisposeAsync();
}

public class MariaDbFixture : IAsyncLifetime
{
    const int MajorVersion = 10;
    const int MinorVersion = 11;
    const int Build = 6;

    public MariaDbContainer? MariaDbContainer { get; private set; }

    public string ConnectionString { get; private set; } = default!;

    public async ValueTask InitializeAsync()
    {
        MariaDbContainer = new MariaDbBuilder()
            .WithImage($"mariadb:{MajorVersion}.{MinorVersion}.{Build}")
            .Build();

        await MariaDbContainer.StartAsync();

        ConnectionString = MariaDbContainer.GetConnectionString();

        await using AppDbContext context = CreateDbContext();
        await context.Database.EnsureCreatedAsync();
        //await context.Database.MigrateAsync(); // Testing
        await OnInitializedAsync(context);
    }

    protected virtual Task OnInitializedAsync(AppDbContext context)
    {
        return Task.FromResult(Task.CompletedTask);
    }

    public async ValueTask DisposeAsync()
    {
        if (MariaDbContainer is not null)
        {
            await MariaDbContainer.StopAsync();
            await MariaDbContainer.DisposeAsync();
        }

        GC.SuppressFinalize(this);
    }

    public AppDbContext CreateDbContext()
    {
        MySqlServerVersion serverVersion = new(new Version(MajorVersion, MinorVersion, Build));

        DbContextOptions<AppDbContext> options = new DbContextOptionsBuilder<AppDbContext>()
            .UseMySql(ConnectionString, serverVersion,
                o => o.EnableRetryOnFailure())
            .EnableSensitiveDataLogging()
            .Options;

        return new AppDbContext(options);
    }

    public async Task ResetAsync()
    {
        await using AppDbContext context = CreateDbContext();

        await context.Database.EnsureDeletedAsync();
        await context.Database.EnsureCreatedAsync();
    }
}

[CollectionDefinition("db")]
public sealed class MariaDbCollection : ICollectionFixture<MariaDbContainerFixture> { }

//public class MariaDbAssemblyFixtureDefinition : IAssemblyFixture<MariaDbContainerFixture> { }


//[UsedImplicitly]
public sealed class MariaDbContainerFixture2(IMessageSink messageSink)
    : ContainerFixture<MariaDbBuilder, MariaDbContainer>(messageSink)
{
    const int MajorVersion = 10;
    const int MinorVersion = 11;
    const int Build = 6;
    
    public string RootConnectionString => $"Server={Container.IpAddress};Port=3306;User=root;Password=rootpw;SslMode=none;";

    protected override MariaDbBuilder Configure(MariaDbBuilder builder)
    {
        return builder.WithImage($"mariadb:{MajorVersion}.{MinorVersion}.{Build}")
           .WithEnvironment("MARIADB_ROOT_PASSWORD", "rootpw")
           .WithPortBinding(3307, 3306)
           //.WithPortBinding(3306, assignRandomHostPort: true)
           .WithWaitStrategy(Wait.ForUnixContainer().UntilInternalTcpPortIsAvailable(3306));
    }
}

public static class MariaTestDb
{
    public static async Task<AppDbContext> CreateIsolatedAsync(string rootConnectionString, Func<AppDbContext, Task>? seed = null)
    {
        string databaseName = $"t_{DateTime.UtcNow:yyyyMMddHHmmss}_{Guid.NewGuid():N}";

        await CreateDatabaseAsync(rootConnectionString, databaseName);

        MySqlConnectionStringBuilder connectionStringBuilder = new(rootConnectionString)
        {
            Database = databaseName
        };

        AppDbContext dbContext = CreateDbContext(connectionStringBuilder.ConnectionString);
        await dbContext.Database.EnsureCreatedAsync();

        if (seed != null)
            await seed(dbContext);

        return dbContext;
    }

    private static async Task CreateDatabaseAsync(string rootConnectionString, string databaseName)
    {
        await using MySqlConnection connection = new(rootConnectionString);

        await connection.OpenAsync();

        await using MySqlCommand command = connection.CreateCommand();
        command.CommandText = $"CREATE DATABASE `{databaseName}` CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;";

        await command.ExecuteNonQueryAsync();
    }

    private static AppDbContext CreateDbContext(string connectionString)
    {
        DbContextOptions<AppDbContext> options = new DbContextOptionsBuilder<AppDbContext>()
            .UseMySql(connectionString, ServerVersion.AutoDetect(connectionString),
                o => o.EnableRetryOnFailure())
            .EnableSensitiveDataLogging()
            .Options;

        return new AppDbContext(options);
    }
}