books/backend/Books.Api.Tests/Infrastructure/IntegrationTestBase.cs

using EventFlow;
using EventFlow.Aggregates;
using Microsoft.Extensions.DependencyInjection;

namespace Books.Api.Tests.Infrastructure;

/// <summary>
/// Base class for integration tests with isolated database per test class.
/// Uses IClassFixture pattern - each test class gets its own database.
/// </summary>
public abstract class IntegrationTestBase
    : IClassFixture<TestWebApplicationFactory>, IDisposable
{
    protected readonly TestWebApplicationFactory Factory;
    protected readonly HttpClient Client;
    private readonly IServiceScope _scope;

    protected IntegrationTestBase(TestWebApplicationFactory factory)
    {
        Factory = factory;
        Client = factory.CreateGraphQLClient();
        _scope = factory.Services.CreateScope();
    }

    protected IServiceProvider Services => _scope.ServiceProvider;

    protected ICommandBus CommandBus => Services.GetRequiredService<ICommandBus>();
    protected IAggregateStore AggregateStore => Services.GetRequiredService<IAggregateStore>();

    protected T GetService<T>() where T : notnull
        => Services.GetRequiredService<T>();

    public void Dispose()
    {
        _scope?.Dispose();
        GC.SuppressFinalize(this);
    }
}