Asp.net WebAPI单元测试

　　单元测试的code 如下：
public void TestPostArticle()
{
var article = new Article
{
Title = "Web API Unit Testing"，
URL = "https://chsakell.com/web-api-unit-testing"，
Author = "Chris Sakellarios"，
DateCreated = DateTime.Now，
Contents = "Unit testing Web API.."
};
var _articlesController = new ArticlesController(_articleService)
{
Configuration = new HttpConfiguration()，
Request = new HttpRequestMessage
{
Method = HttpMethod.Post，
RequestUri = new Uri("http://localhost/api/articles")
}
};
var result = _articlesController.PostArticle(article) as CreatedAtRouteNegotiatedContentResult<Article>;
Assert.That(result.RouteName， Is.EqualTo("DefaultApi"));
Assert.That(result.Content.ID， Is.EqualTo(result.RouteValues["id"]));
Assert.That(result.Content.ID， Is.EqualTo(_randomArticles.Max(a => a.ID)));
}
　　在controller的实例的时候直接传递IArticleService 实例。
public static   IArticleService GetIArticleService()
{
var _article = new Mock<IArticleService>();
_article.Setup(x => x.GetArticles(It.IsAny<string>())).Returns(new Func<string， List<Article>>(name =>
{
if (string.IsNullOrEmpty(name))
{
return _randomArticles;
}
else
{
return _randomArticles.FindAll(x => x.Title.Contains(name));
}
}));
_article.Setup(x => x.GetArticle(It.IsAny<int>())).Returns(new Func<int， Article>(id =>
{
return _randomArticles.Find(x => x.ID == id);
}));
_article.Setup(x => x.GetArticle(It.IsAny<string>())).Returns(new Func<string， Article>(name =>
{
return _randomArticles.Find(x => x.Title == name);
}));
_article.Setup(r => r.CreateArticle(It.IsAny<Article>()))
.Callback(new Action<Article>(newArticle =>
{
newArticle.DateCreated = DateTime.Now;
newArticle.ID = _randomArticles.Last().ID + 1;
_randomArticles.Add(newArticle);
}));
_article.Setup(r => r.UpdateArticle(It.IsAny<Article>()))
.Callback(new Action<Article>(x =>
{
var oldArticle = _randomArticles.Find(a => a.ID == x.ID);
oldArticle.DateEdited = DateTime.Now;
oldArticle.URL = x.URL;
oldArticle.Title = x.Title;
oldArticle.Contents = x.Contents;
oldArticle.BlogID = x.BlogID;
}));
return _article.Object;
}
　　由于WebApi一般都是用来提供接口的，使用者往往是以发送http请求来获取数据，我们也可以用这种方式来做单元测试：
public void TestPostArticle2()
{
var article = new Article
{
Title = "Web API Unit Testing2"，
URL = "https://chsakell.com/web-api-unit-testing"，
Author = "Chris Sakellarios"，
DateCreated = DateTime.Now，
Contents = "Unit testing Web API.."
};
var address = "http://localhost:9000/";
using (WebApp.Start<Startup>(address))
{
HttpClient _client = new HttpClient();
var response = _client.PostAsJsonAsync<Article>(address + "api/articles/"， article).Result;
var result = response.Content.ReadAsAsync<Article>().Result;
Assert.That(result.Title， Is.EqualTo(article.Title));
Assert.That(_randomArticles.Last().Title， Is.EqualTo(article.Title));
}
}
　　那么我们如何托起这个web 程序，有如何 使用IOC，
　　这里IOC 用Autofac，其所用包如下：
Install-Package Owin
Install-Package Microsoft.AspNet.WebApi.Owin
Install-Package Microsoft.Owin.Host.HttpListener
Install-Package Microsoft.Owin.Hosting
Install-Package Autofac
Install-Package Autofac.WebApi2
public class Startup
{
public void Configuration(IAppBuilder appBuilder)
{
var config = new HttpConfiguration();
// config.Services.Replace(typeof(IAssembliesResolver)， new CustomAssembliesResolver());
config.Routes.MapHttpRoute(
name: "DefaultApi"，
routeTemplate: "api/{controller}/{id}"，
defaults: new { id = RouteParameter.Optional }
);
var builder = new ContainerBuilder();
builder.RegisterApiControllers(typeof(ArticlesController).Assembly);
var _articleService = Helper.GetIArticleService();
builder.RegisterInstance(_articleService).As<IArticleService>();
IContainer container = builder.Build();
config.DependencyResolver = new AutofacWebApiDependencyResolver(container);
appBuilder.UseWebApi(config);
}
}