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ASP.NETWebAPI單元測試-單元測試
今天來到了最后的壓軸章節(jié)：單元測試
十年的安溪網(wǎng)站建設(shè)經(jīng)驗(yàn)，針對設(shè)計(jì)、前端、開發(fā)、售后、文案、推廣等六對一服務(wù)，響應(yīng)快，48小時及時工作處理。成都營銷網(wǎng)站建設(shè)的優(yōu)勢是能夠根據(jù)用戶設(shè)備顯示端的尺寸不同，自動調(diào)整安溪建站的顯示方式，使網(wǎng)站能夠適用不同顯示終端，在瀏覽器中調(diào)整網(wǎng)站的寬度，無論在任何一種瀏覽器上瀏覽網(wǎng)站，都能展現(xiàn)優(yōu)雅布局與設(shè)計(jì)，從而大程度地提升瀏覽體驗(yàn)。創(chuàng)新互聯(lián)建站從事“安溪網(wǎng)站設(shè)計(jì)”,“安溪網(wǎng)站推廣”以來，每個客戶項(xiàng)目都認(rèn)真落實(shí)執(zhí)行。
我們已經(jīng)有了完整的程序結(jié)構(gòu)，現(xiàn)在是時候來對我們的組件做單元測試了。
在UnitTestingWebAPI.Tests類庫上添加UnitTestingWebAPI.Domain, UnitTestingWebAPI.Data, UnitTestingWebAPI.Service和UnitTestingWebAPI.API.Core 同樣要安裝下列的Nuget 包：
Entity Framework
Microsoft.AspNet.WebApi.Core
Microsoft.AspNet.WebApi.Client
Microsoft.AspNet.WebApi.Owin
Microsoft.AspNet.WebApi.SelfHost
Micoroft.Owin
Owin
Micoroft.Owin.Hosting
Micoroft.Owin.Host.HttpListener
Autofac.WebApi2
NUnit
NUnitTestAdapter
從清單中可知，我們將用NUnit 來寫單元測試
Services 單元測試
寫單元測試的第一件事是需要去設(shè)置或初始化一些單元測試中要用到的變量，NUnit框架則給要測試的方法添加Setup特性，在任何其他的NUnit測試開始之前，這一方法會先執(zhí)行，把Services層注入到Controller的構(gòu)造函數(shù)之后的第一件事就是進(jìn)行單元測試。因此在對WebAPI進(jìn)行單元測試之前需要仿造Repositories和Service。
在這個例子中會看到如何仿造ArticleService, 并在這個Service的構(gòu)造函數(shù)中注入IArticleRepository和IUnitOfWork，所以我們需要創(chuàng)建兩個"特別的"實(shí)例來注入。
ArticleService Constructor
private readonly IArticleRepository articlesRepository;
private readonly IUnitOfWork unitOfWork;
public ArticleService(IArticleRepository articlesRepository, IUnitOfWork unitOfWork)
{
this.articlesRepository = articlesRepository;
this.unitOfWork = unitOfWork;
}這里的"特別的"，是因?yàn)檫@些實(shí)例不是真正訪問數(shù)據(jù)庫的實(shí)例.
注意
單元測試必須運(yùn)行在內(nèi)存中并且不應(yīng)該訪問數(shù)據(jù)庫. 所有核心的方法必須通過像我們的例子中用Mock這樣的框架仿造。這個方式自動的測試會更快些。單元測試最基本的目的是更多的測試組件的行為，而不是真正的結(jié)果.
開始測試ArticleService，創(chuàng)建一個ServiceTests的文件并添加下列代碼：
[TestFixture]
public class ServicesTests
{
#region Variables
IArticleService _articleService;
IArticleRepository _articleRepository;
IUnitOfWork _unitOfWork;
List _randomArticles;
#endregion
#region Setup
[SetUp]
public void Setup()
{
_randomArticles = SetupArticles();
_articleRepository = SetupArticleRepository();
_unitOfWork = new Mock().Object;
_articleService = new ArticleService(_articleRepository, _unitOfWork);
}
public List SetupArticles()
{
int _counter = new int();
List _articles = BloggerInitializer.GetAllArticles();
foreach (Article _article in _articles)
_article.ID = ++_counter;
return _articles;
}
public IArticleRepository SetupArticleRepository()
{
// Init repository
var repo = new Mock();
// Setup mocking behavior
repo.Setup(r => r.GetAll()).Returns(_randomArticles);
repo.Setup(r => r.GetById(It.IsAny()))
.Returns(new Func(
id => _randomArticles.Find(a => a.ID.Equals(id))));
repo.Setup(r => r.Add(It.IsAny()))
.Callback(new Action(newArticle =>
{
dynamic maxArticleID = _randomArticles.Last().ID;
newArticle.ID = maxArticleID + 1;
newArticle.DateCreated = DateTime.Now;
_randomArticles.Add(newArticle);
}));
repo.Setup(r => r.Update(It.IsAny()))
.Callback(new Action(x =>
{
var oldArticle = _randomArticles.Find(a => a.ID == x.ID);
oldArticle.DateEdited = DateTime.Now;
oldArticle = x;
}));
repo.Setup(r => r.Delete(It.IsAny()))
.Callback(new Action(x =>
{
var _articleToRemove = _randomArticles.Find(a => a.ID == x.ID);
if (_articleToRemove != null)
_randomArticles.Remove(_articleToRemove);
}));
// Return mock implementation
return repo.Object;
}
#endregion
} 如果你直接copy代碼可能會報(bào)錯：
One or more types required to compile a dynaic expression ....
解決辦法：
在Assembiles中添加Microsoft.CSharp.dll
在SetupArticleRepository()方法中我們模仿了_articleRepository的行為，換句話說,當(dāng)一個特定的方法使用了這個Reporistory的實(shí)例，就會得到我們所期待的結(jié)果。然后我們在_articleService的構(gòu)造函數(shù)中注入這個實(shí)例。我們用下面代碼測試_articleService.GetArticles()的行為是否是我們所期待的.
ServiceShouldReturnAllArticles Test
[Test]
public void ServiceShouldReturnAllArticles()
{
var articles = _articleService.GetArticles();
NUnit.Framework.Assert.That(articles, Is.EqualTo(_randomArticles));
}編譯項(xiàng)目，運(yùn)行測試，要確保這個測試變?yōu)榫G色通過狀態(tài)，用同樣的方式創(chuàng)建下面的測試：
Services Test
[Test]
public void ServiceShouldReturnRightArticle()
{
var wcfSecurityArticle = _articleService.GetArticle(2);
NUnit.Framework.Assert.That(wcfSecurityArticle,
Is.EqualTo(_randomArticles.Find(a => a.Title.Contains("Secure WCF Services"))));
}
[Test]
public void ServiceShouldAddNewArticle()
{
var _newArticle = new Article()
{
Author = "Chris Sakellarios",
Contents = "If you are an ASP.NET MVC developer, you will certainly..",
Title = "URL Rooting in ASP.NET (Web Forms)",
URL = "https://chsakell.com/2013/12/15/url-rooting-in-asp-net-web-forms/"
};
int _maxArticleIDBeforeAdd = _randomArticles.Max(a => a.ID);
_articleService.CreateArticle(_newArticle);
NUnit.Framework.Assert.That(_newArticle, Is.EqualTo(_randomArticles.Last()));
NUnit.Framework.Assert.That(_maxArticleIDBeforeAdd + 1, Is.EqualTo(_randomArticles.Last().ID));
}
[Test]
public void ServiceShouldUpdateArticle()
{
var _firstArticle = _randomArticles.First();
_firstArticle.Title = "OData feat. ASP.NET Web API"; // reversed
_firstArticle.URL = "http://t.co/fuIbNoc7Zh"; // short link
_articleService.UpdateArticle(_firstArticle);
NUnit.Framework.Assert.That(_firstArticle.DateEdited, Is.Not.EqualTo(DateTime.MinValue));
NUnit.Framework.Assert.That(_firstArticle.URL, Is.EqualTo("http://t.co/fuIbNoc7Zh"));
NUnit.Framework.Assert.That(_firstArticle.ID, Is.EqualTo(1)); // hasn't changed
}
[Test]
public void ServiceShouldDeleteArticle()
{
int maxID = _randomArticles.Max(a => a.ID); // Before removal
var _lastArticle = _randomArticles.Last();
// Remove last article
_articleService.DeleteArticle(_lastArticle);
NUnit.Framework.Assert.That(maxID, Is.GreaterThan(_randomArticles.Max(a => a.ID))); // Max reduced by 1
} WebAPI 控制器單元測試
在熟悉了偽造Services行為測試的基礎(chǔ)上，來進(jìn)行WebAPI控制器的單元測試。
第一件事：設(shè)置在測試中需要的變量。
用下面的代碼創(chuàng)建用于測試的控制器：
[TestFixture]
public class ControllerTests
{
#region Variables
IArticleService _articleService;
IArticleRepository _articleRepository;
IUnitOfWork _unitOfWork;
List _randomArticles;
#endregion
#region Setup
[SetUp]
public void Setup()
{
_randomArticles = SetupArticles();
_articleRepository = SetupArticleRepository();
_unitOfWork = new Mock().Object;
_articleService = new ArticleService(_articleRepository, _unitOfWork);
}
///
/// Setup Articles
///
/// SetupArticles()
{
int _counter = new int();
List _articles = BloggerInitializer.GetAllArticles();
foreach (Article _article in _articles)
_article.ID = ++_counter;
return _articles;
}
///
/// Emulate _articleRepository behavior
///
/// ();
// Get all articles
repo.Setup(r => r.GetAll()).Returns(_randomArticles);
// Get Article by id
repo.Setup(r => r.GetById(It.IsAny()))
.Returns(new Func(
id => _randomArticles.Find(a => a.ID.Equals(id))));
// Add Article
repo.Setup(r => r.Add(It.IsAny()))
.Callback(new Action(newArticle =>
{
dynamic maxArticleID = _randomArticles.Last().ID;
newArticle.ID = maxArticleID + 1;
newArticle.DateCreated = DateTime.Now;
_randomArticles.Add(newArticle);
}));
// Update Article
repo.Setup(r => r.Update(It.IsAny()))
.Callback(new Action(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;
}));
// Delete Article
repo.Setup(r => r.Delete(It.IsAny()))
.Callback(new Action(x =>
{
var _articleToRemove = _randomArticles.Find(a => a.ID == x.ID);
if (_articleToRemove != null)
_randomArticles.Remove(_articleToRemove);
}));
// Return mock implementation
return repo.Object;
}
#endregion
} 控制器的類和其它的類一樣，所以我們可以分開各自測試。下面測試_articlesController.GetArticles()，看看是否能返回所有的文章。
[Test]
public void ControlerShouldReturnAllArticles()
{
var _articlesController = new ArticlesController(_articleService);
var result = _articlesController.GetArticles();
CollectionAssert.AreEqual(result, _randomArticles);
}請確保測試已綠色通過，我們初始化了3條數(shù)據(jù)，用_articlesController.GetArticle(3)測試看看能否返回最后一條。
[Test]
public void ControlerShouldReturnLastArticle()
{
var _articlesController = new ArticlesController(_articleService);
var result = _articlesController.GetArticle(3) as OkNegotiatedContentResult;
Assert.IsNotNull(result);
Assert.AreEqual(result.Content.Title, _randomArticles.Last().Title);
} 測試一個無效的Update操作，必須失敗并且返回一個BadRequestResult, 重新調(diào)用設(shè)置在_articleRepository上的Update操作。
repo.Setup(r => r.Update(It.IsAny())) .Callback(new Action (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; }));
所以，當(dāng)我們測試一個不存在的文章就應(yīng)該返回失敗信息。
[Test]
public void ControlerShouldPutReturnBadRequestResult()
{
var _articlesController = new ArticlesController(_articleService)
{
Configuration = new HttpConfiguration(),
Request = new HttpRequestMessage
{
Method = HttpMethod.Put,
RequestUri = new Uri("http://localhost/api/articles/-1")
}
};
var badresult = _articlesController.PutArticle(-1, new Article() { Title = "Unknown Article" });
Assert.That(badresult, Is.TypeOf());
} 通過分別成功更新第一篇文章、發(fā)表一篇新文章、發(fā)布失敗一篇文章來完成我們的單元測試。
Controller 單元測試
[Test]
public void ControlerShouldPutUpdateFirstArticle()
{
var _articlesController = new ArticlesController(_articleService)
{
Configuration = new HttpConfiguration(),
Request = new HttpRequestMessage
{
Method = HttpMethod.Put,
RequestUri = new Uri("http://localhost/api/articles/1")
}
};
IHttpActionResult updateResult = _articlesController.PutArticle(1, new Article()
{
ID = 1,
Title = "ASP.NET Web API feat. OData",
URL = "http://t.co/fuIbNoc7Zh",
Contents = @"OData is an open standard protocol.."
}) as IHttpActionResult;
Assert.That(updateResult, Is.TypeOf());
StatusCodeResult statusCodeResult = updateResult as StatusCodeResult;
Assert.That(statusCodeResult.StatusCode, Is.EqualTo(HttpStatusCode.NoContent));
Assert.That(_randomArticles.First().URL, Is.EqualTo("http://t.co/fuIbNoc7Zh"));
}
[Test]
public void ControlerShouldPostNewArticle()
{
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")
}
};
_articlesController.Configuration.MapHttpAttributeRoutes();
_articlesController.Configuration.EnsureInitialized();
_articlesController.RequestContext.RouteData = new HttpRouteData(
new HttpRoute(), new HttpRouteValueDictionary { { "_articlesController", "Articles" } });
var result = _articlesController.PostArticle(article) as CreatedAtRouteNegotiatedContentResult;
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)));
}
[Test]
public void ControlerShouldNotPostNewArticle()
{
var article = new Article
{
Title = "Web API Unit Testing",
URL = "https://chsakell.com/web-api-unit-testing",
Author = "Chris Sakellarios",
DateCreated = DateTime.Now,
Contents = null
};
var _articlesController = new ArticlesController(_articleService)
{
Configuration = new HttpConfiguration(),
Request = new HttpRequestMessage
{
Method = HttpMethod.Post,
RequestUri = new Uri("http://localhost/api/articles")
}
};
_articlesController.Configuration.MapHttpAttributeRoutes();
_articlesController.Configuration.EnsureInitialized();
_articlesController.RequestContext.RouteData = new HttpRouteData(
new HttpRoute(), new HttpRouteValueDictionary { { "Controller", "Articles" } });
_articlesController.ModelState.AddModelError("Contents", "Contents is required field");
var result = _articlesController.PostArticle(article) as InvalidModelStateResult;
Assert.That(result.ModelState.Count, Is.EqualTo(1));
Assert.That(result.ModelState.IsValid, Is.EqualTo(false));
} 上面測試的重點(diǎn)，我們請求的幾個方面：返回碼或路由屬性。
管理 Handler單元測試
你可以通過創(chuàng)建HttpMessageInvoker的實(shí)例來測試Message Handler, 解析你要測試的Handler實(shí)例并調(diào)用SendAsync 方法。創(chuàng)建一個MessageHandlerTest.cs文件，并貼上下面的啟動設(shè)置代碼
#region Variables
private EndRequestHandler _endRequestHandler;
private HeaderAppenderHandler _headerAppenderHandler;
#endregion
#region Setup
[SetUp]
public void Setup()
{
// Direct MessageHandler test
_endRequestHandler = new EndRequestHandler();
_headerAppenderHandler = new HeaderAppenderHandler()
{
InnerHandler = _endRequestHandler
};
}
#endregion我們在HeaderAppenderHandler的內(nèi)部設(shè)置另外一個可以終止請求的Hanlder.只要Uri中包含一個測試字符，從新調(diào)用EndRequestHandler將會終止請求.現(xiàn)在來測試.
[Test]
public async void ShouldAppendCustomHeader()
{
var invoker = new HttpMessageInvoker(_headerAppenderHandler);
var result = await invoker.SendAsync(new HttpRequestMessage(HttpMethod.Get,
new Uri("http://localhost/api/test/")), CancellationToken.None);
Assert.That(result.Headers.Contains("X-WebAPI-Header"), Is.True);
Assert.That(result.Content.ReadAsStringAsync().Result,
Is.EqualTo("Unit testing message handlers!"));
}假如要做一個集成測試：當(dāng)一個請求被消息管道分配到Controller的Action的真實(shí)behavior。
這將需要運(yùn)行WebApi，然后運(yùn)行單元測試。怎么做呢？必須是 通過Self host的模式運(yùn)行API，然后設(shè)置恰當(dāng)?shù)呐渲谩?/p>
在UnitTestingWebAPI.Tests的項(xiàng)目中添加Startup.cs文件：
Hosting/Startup.cs
public class Startup
{
public void Configuration(IAppBuilder appBuilder)
{
var config = new HttpConfiguration();
config.MessageHandlers.Add(new HeaderAppenderHandler());
config.MessageHandlers.Add(new EndRequestHandler());
config.Filters.Add(new ArticlesReversedFilter());
config.Services.Replace(typeof(IAssembliesResolver), new CustomAssembliesResolver());
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
config.MapHttpAttributeRoutes();
// Autofac configuration
var builder = new ContainerBuilder();
builder.RegisterApiControllers(typeof(ArticlesController).Assembly);
// Unit of Work
var _unitOfWork = new Mock();
builder.RegisterInstance(_unitOfWork.Object).As();
//Repositories
var _articlesRepository = new Mock();
_articlesRepository.Setup(x => x.GetAll()).Returns(
BloggerInitializer.GetAllArticles()
);
builder.RegisterInstance(_articlesRepository.Object).As();
var _blogsRepository = new Mock();
_blogsRepository.Setup(x => x.GetAll()).Returns(
BloggerInitializer.GetBlogs
);
builder.RegisterInstance(_blogsRepository.Object).As();
// Services
builder.RegisterAssemblyTypes(typeof(ArticleService).Assembly)
.Where(t => t.Name.EndsWith("Service"))
.AsImplementedInterfaces().InstancePerRequest();
builder.RegisterInstance(new ArticleService(_articlesRepository.Object, _unitOfWork.Object));
builder.RegisterInstance(new BlogService(_blogsRepository.Object, _unitOfWork.Object));
IContainer container = builder.Build();
config.DependencyResolver = new AutofacWebApiDependencyResolver(container);
appBuilder.UseWebApi(config);
}
} 可能注意到和UnitTestingWebAPI.API里的WebSetup類的不同之處在與，這里我們用了假的Repositories和Services。
返回到ControllerTests.cs中。
[Test]
public void ShouldCallToControllerActionAppendCustomHeader()
{
//Arrange
var address = "http://localhost:9000/";
using (WebApp.Start(address))
{
HttpClient _client = new HttpClient();
var response = _client.GetAsync(address + "api/articles").Result;
Assert.That(response.Headers.Contains("X-WebAPI-Header"), Is.True);
var _returnedArticles = response.Content.ReadAsAsync>().Result;
Assert.That(_returnedArticles.Count, Is.EqualTo(BloggerInitializer.GetAllArticles().Count));
}
} 媒體類型格式化器 測試
我們在UnitTestingWebAPI.API.Core中創(chuàng)建了ArticleFormatter，現(xiàn)在測試一下，應(yīng)該返回用逗號分割的文章字符串。它只能是寫文章的實(shí)例，但不能讀或者明白其它類型的類。為了應(yīng)用這個格式化器需要設(shè)置請求頭信息的Accept為application/article
[TestFixture]
public class MediaTypeFormatterTests
{
#region Variables
Blog _blog;
Article _article;
ArticleFormatter _formatter;
#endregion
#region Setup
[SetUp]
public void Setup()
{
_blog = BloggerInitializer.GetBlogs().First();
_article = BloggerInitializer.GetChsakellsArticles().First();
_formatter = new ArticleFormatter();
}
#endregion
}我們可以創(chuàng)建一個ObjectContent來測試MediaTypeFormatter,傳遞一個對象來檢查是否能被被格式化，如果格式化器不能讀和寫傳遞過去的對象則會拋出異常，例如，文章的格式化器不能識別Blog對象：
[Test]
public void FormatterShouldThrowExceptionWhenUnsupportedType()
{
Assert.Throws(() => new ObjectContent(_blog, _formatter));
} 換句話說，傳一個Article對象就一定會通過測試
[Test]
public void FormatterShouldNotThrowExceptionWhenArticle()
{
Assert.DoesNotThrow(() => new ObjectContent(_article, _formatter));
} 用下面的代碼測試不符合MediaType formatter的Media type
Media Type Formatters Unit tests
[Test]
public void FormatterShouldHeaderBeSetCorrectly()
{
var content = new ObjectContent(_article, new ArticleFormatter());
Assert.That(content.Headers.ContentType.MediaType, Is.EqualTo("application/article"));
}
[Test]
public async void FormatterShouldBeAbleToDeserializeArticle()
{
var content = new ObjectContent(_article, _formatter);
var deserializedItem = await content.ReadAsAsync(new[] { _formatter });
Assert.That(_article, Is.SameAs(deserializedItem));
}
[Test]
public void FormatterShouldNotBeAbleToWriteUnsupportedType()
{
var canWriteBlog = _formatter.CanWriteType(typeof(Blog));
Assert.That(canWriteBlog, Is.False);
}
[Test]
public void FormatterShouldBeAbleToWriteArticle()
{
var canWriteArticle = _formatter.CanWriteType(typeof(Article));
Assert.That(canWriteArticle, Is.True);
} 路由測試
在不Host Web API的情況下，測試路由配置。為了這個目的，需要一個可以從HttpControllerContext的實(shí)例中返回Controllerl類型或Controller中Action的幫助類，在測試之前，先創(chuàng)建一個路由配置的HttpConfiguration
Helpers/ControllerActionSelector.cs
public class ControllerActionSelector
{
#region Variables
HttpConfiguration config;
HttpRequestMessage request;
IHttpRouteData routeData;
IHttpControllerSelector controllerSelector;
HttpControllerContext controllerContext;
#endregion
#region Constructor
public ControllerActionSelector(HttpConfiguration conf, HttpRequestMessage req)
{
config = conf;
request = req;
routeData = config.Routes.GetRouteData(request);
request.Properties[HttpPropertyKeys.HttpRouteDataKey] = routeData;
controllerSelector = new DefaultHttpControllerSelector(config);
controllerContext = new HttpControllerContext(config, routeData, request);
}
#endregion
#region Methods
public string GetActionName()
{
if (controllerContext.ControllerDescriptor == null)
GetControllerType();
var actionSelector = new ApiControllerActionSelector();
var descriptor = actionSelector.SelectAction(controllerContext);
return descriptor.ActionName;
}
public Type GetControllerType()
{
var descriptor = controllerSelector.SelectController(request);
controllerContext.ControllerDescriptor = descriptor;
return descriptor.ControllerType;
}
#endregion
}下面是路由測試：
[TestFixture]
public class RouteTests
{
#region Variables
HttpConfiguration _config;
#endregion
#region Setup
[SetUp]
public void Setup()
{
_config = new HttpConfiguration();
_config.Routes.MapHttpRoute(name: "DefaultWebAPI", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional });
}
#endregion
#region Helper methods
public static string GetMethodName(Expression> expression)
{
var method = expression.Body as MethodCallExpression;
if (method != null)
return method.Method.Name;
throw new ArgumentException("Expression is wrong");
}
#endregion
} 測試一個請求api/articles/5到ArticleController的action GetArticle(int id)
[Test]
public void RouteShouldControllerGetArticleIsInvoked()
{
var request = new HttpRequestMessage(HttpMethod.Get, "http://www.chsakell.com/api/articles/5");
var _actionSelector = new ControllerActionSelector(_config, request);
Assert.That(typeof(ArticlesController), Is.EqualTo(_actionSelector.GetControllerType()));
Assert.That(GetMethodName((ArticlesController c) => c.GetArticle(5)),
Is.EqualTo(_actionSelector.GetActionName()));
}我們用反射得到controller的action名稱，用同樣的方法來測試post提交的action
[Test]
public void RouteShouldPostArticleActionIsInvoked()
{
var request = new HttpRequestMessage(HttpMethod.Post, "http://www.chsakell.com/api/articles/");
var _actionSelector = new ControllerActionSelector(_config, request);
Assert.That(GetMethodName((ArticlesController c) =>
c.PostArticle(new Article())), Is.EqualTo(_actionSelector.GetActionName()));
}下面這個測試，路由會發(fā)生異常.
[Test]
public void RouteShouldInvalidRouteThrowException()
{
var request = new HttpRequestMessage(HttpMethod.Post, "http://www.chsakell.com/api/InvalidController/");
var _actionSelector = new ControllerActionSelector(_config, request);
Assert.Throws(() => _actionSelector.GetActionName());
} 結(jié)論
我們看到了Web API棧很多方面的單元測試，例如: mocking 服務(wù)層，單元測試控制器，消息管道，過濾器，定制媒體類型和路由配置。
嘗試在你的程序中總是寫單元測試，你不會后悔的。從里面會得到很多的好處，例如：在repository中一個簡單的修改可能破壞很多方面，如果寫一個合適的測試，則可能破壞你程序的問題會立即出現(xiàn).
原文：chsakell's Blog
當(dāng)前題目：ASP.NETWebAPI單元測試-單元測試
當(dāng)前鏈接：http://ef60e0e.cn/article/gegioe.html
