BCards/tests/BCards.Tests/Fixtures/BCardsWebApplicationFactory.cs

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using MongoDB.Driver;
using BCards.Web.Configuration;

namespace BCards.Tests.Fixtures;

public class BCardsWebApplicationFactory<TStartup> : WebApplicationFactory<TStartup> where TStartup : class
{
    public IMongoDatabase TestDatabase { get; private set; } = null!;
    
    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureAppConfiguration((context, config) =>
        {
            // Remove existing configuration and add test configuration
            config.Sources.Clear();
            config.AddJsonFile("appsettings.Testing.json");
            config.AddEnvironmentVariables();
        });

        builder.ConfigureServices(services =>
        {
            // Remove the existing MongoDB registration
            var mongoDescriptor = services.SingleOrDefault(
                d => d.ServiceType == typeof(IMongoDatabase));
            if (mongoDescriptor != null)
            {
                services.Remove(mongoDescriptor);
            }

            var mongoClientDescriptor = services.SingleOrDefault(
                d => d.ServiceType == typeof(IMongoClient));
            if (mongoClientDescriptor != null)
            {
                services.Remove(mongoClientDescriptor);
            }

            // Add test MongoDB client and database
            services.AddSingleton<IMongoClient>(serviceProvider =>
            {
                var testConnectionString = "mongodb://localhost:27017";
                return new MongoClient(testConnectionString);
            });

            services.AddScoped(serviceProvider =>
            {
                var client = serviceProvider.GetRequiredService<IMongoClient>();
                var databaseName = $"bcards_test_{Guid.NewGuid():N}";
                TestDatabase = client.GetDatabase(databaseName);
                return TestDatabase;
            });

            // Configure test Stripe settings
            services.Configure<StripeSettings>(options =>
            {
                options.PublishableKey = "pk_test_fake_key_for_testing";
                options.SecretKey = "sk_test_fake_key_for_testing";
                options.WebhookSecret = "whsec_fake_webhook_secret_for_testing";
            });
        });

        builder.UseEnvironment("Testing");
        
        // Suppress logs during testing to reduce noise
        builder.ConfigureLogging(logging =>
        {
            logging.ClearProviders();
            logging.AddConsole();
            logging.SetMinimumLevel(LogLevel.Warning);
        });
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing && TestDatabase != null)
        {
            // Clean up test database
            try
            {
                var client = TestDatabase.Client;
                client.DropDatabase(TestDatabase.DatabaseNamespace.DatabaseName);
            }
            catch (Exception)
            {
                // Ignore cleanup errors
            }
        }
        
        base.Dispose(disposing);
    }
}