PTV-Street/tests/StreetWebApplicationFactory.cs

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc.Testing;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Testcontainers.PostgreSql;

public class StreetWebApplicationFactory<Program> : WebApplicationFactory<Program>, IAsyncLifetime where Program : class
{
    private readonly PostgreSqlContainer dbTestContainer;

    public StreetWebApplicationFactory()
    {
        dbTestContainer = new PostgreSqlBuilder().WithImage("postgis/postgis:17-3.5").Build();
    }

    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureServices(services =>
        {

            var descriptor = services.SingleOrDefault(d => d.ServiceType == typeof(DbContextOptions<StreetDbContext>));
            if (descriptor != null)
            {
                services.Remove(descriptor);
            }

            // Use the test database
            services.AddDbContext<StreetDbContext>(options => options.UseNpgsql(dbTestContainer.GetConnectionString(), o => o.UseNetTopologySuite()));

            // Ensure the database is created before running the tests
            using var scope = services.BuildServiceProvider().CreateScope();
            var db = scope.ServiceProvider.GetRequiredService<StreetDbContext>();
            db.Database.EnsureCreated();

        });
    }

    public async Task InitializeAsync()
    {
        await dbTestContainer.StartAsync();
    }

    async Task IAsyncLifetime.DisposeAsync()
    {
        await dbTestContainer.DisposeAsync();
    }
}