在.NET CORE中，如何执行XUnit测试以检查并验证从AppSetting.json加载的正确信息

Question

我正在使用.NET CORE应用程序中运行的SendGrid Azure规范进行XUnit测试。我很擅长测试世界，以了解它背后的哲学。

我是EmailService类，负责执行电子邮件发送功能。

在我的第一个测试中，我想检查是否从appsetting.json文件加载了正确的配置。

appsetting.json

 "SendGridEmailSettings": {
 "SendGrid_API_Key": "xxx",
 "SenderConfig": {
   "From": "[email protected]",
   "Name": "my organization"
 }
}

测试类

using Xunit;
using Xunit.Extensions;

namespace Services.Specs
{
  public class EmailServiceSpec: Specification
  {

    protected override void Observe()
    {
        var configuration = Substitute.For<IConfiguration>();
        Bag.Configuration = configuration;
    }
}

public class EmailServiceShould: EmailServiceSpec
{
    public EmailServiceShould()
    {
        Observe();
    }

    [Fact]
    public void Load_Valid_Configuration_From_AppSetting()
    {
        //var SendGrid_API_Key = Configuration["SendGridEmailSettings:SendGrid_API_Key"]; this doesn't work
    }
 }
}

电子邮件服务配置类

public interface IEmailConfig
{
     string SendGrid_API_Key { get; set; }
    SenderEmailConfig SenderConfig { get; set; }
}

电子邮件服务类

 public interface IEmailService
{       
    Task SendEmail(EmailMultipleAudience email);
    Task SendEmail(EmailSingleAudience email);
}

public class EmailData
{
    public string Subject { get; set; }
    public string PlainTextContent { get; set; }
    public string HtmlContent { get; set; }
}

public class EmailSingleAudience: EmailData
{
    public EmailAddress To { get; set; }
}

public class EmailMultipleAudience : EmailData
{
    public List<EmailAddress> To { get; set; }
}

Answer 1

如果您有一个单独的项目，请将您的appsettings.json复制到XUnit测试项目中（否则跳过此步骤）。然后加载它：

var Configuration = new ConfigurationBuilder()
                .AddJsonFile("appsettings.json")
                .Build();

然后你可以使用它。

var SendGrid_API_Key = Configuration["SendGridEmailSettings:SendGrid_API_Key"];