设置集成测试环境

我想在我的集成测试中使用设置环境WebApplicationFactory。默认情况下，env 设置为Development。我的网络应用程序工厂的代码如下所示：

public class CustomWebApplicationFactory<TStartup> : WebApplicationFactory<TStartup>
    where TStartup : class
{
    protected override void ConfigureWebHost(IWebHostBuilder builder)
    {
        builder.UseSolutionRelativeContentRoot(AppContext.BaseDirectory);

        base.ConfigureWebHost(builder);
    }

    protected override IWebHostBuilder CreateWebHostBuilder()
    {
        return WebHost.CreateDefaultBuilder()
            .UseStartup<TStartup>()
            .UseEnvironment("test"); // i want to launch `test` environment while im
                                     // testing my app
    }
}

当我开始调试时Startup类（当我运行测试时）我仍然得到Development环境：

public Startup(IHostEnvironment env)
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("appsettings.json", false, true)
        .AddJsonFile($"appsettings.{env.EnvironmentName}.json", true)
        // env.EnvironmentName is set to 'Development' while i set it to 'test'
        // in my WebApplicationFactory
        .AddEnvironmentVariables();

    Configuration = builder.Build();
}

如何设置环境WebApplicationFactory适当地？或者也许只有在启动时才改变测试策略我依赖appsettings files?

我遇到了同样的问题，并为我解决了以下问题：

protected override void ConfigureWebHost(IWebHostBuilder builder)
{
     builder.UseEnvironment("Test");
}