ASP。NET核心集成测试

我遵循这个MS文档中的模式:

https://docs.microsoft.com/en-us/aspnet/core/test/integration-tests?view=aspnetcore-2.2

public class CustomWebApplicationFactory<TStartup> : WebApplicationFactory<Startup>
{
    protected override IWebHostBuilder CreateWebHostBuilder()
    {
        return WebHost.CreateDefaultBuilder()
            .UseStartup<Startup>();
    }

    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.ConfigureServices(services =>
        {
            var serviceProvider = new ServiceCollection()
                .AddEntityFrameworkInMemoryDatabase()
                .BuildServiceProvider();

            services.AddDbContext<MyDbContext>(options =>
            {
                options.UseInMemoryDatabase("MyDb");
                options.UseInternalServiceProvider(serviceProvider);
            });

            serviceProvider = services.BuildServiceProvider();

            using (var scope = serviceProvider.CreateScope())
            {
                var scopedProvider = scope.ServiceProvider;
                var myDb = scopedProvider.GetRequiredService<MyDbContext>();
                var logger = scopedProvider.GetRequiredService<ILogger<CustomWebApplicationFactory<TStartup>>>();

                myDb.Database.EnsureCreated();
            }
        });

        builder.UseContentRoot(".");
        base.ConfigureWebHost(builder);
    }
}

但是在这条线上

var myDb = scopedProvider.GetRequiredService<MyDbContext>();

实体框架服务尚未添加到内部服务 EF将管理自己的内部服务,或使用您的 (例如AddEntityFrameworkSqlServer)。

这毫无意义,因为我认为我正在向这条线上的内部服务提供商添加EF服务:

var serviceProvider = new ServiceCollection()
    .AddEntityFrameworkInMemoryDatabase()
    .BuildServiceProvider();