用于web类库代码的单元测试

最近把appcache的功能放到了公用类库中，写单元测试时发现用不了 HttpContext, 

代码如下：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Web;using System.Web.Caching;namespace Lib.Csharp.Tools{    /// <summary>    /// system.web.caching操作类    /// 用于web    /// </summary>    public class AppCache    {        public static Cache MyCache = HttpContext.Current.Cache;        private AppCache() { }        public static bool IsExist(string key)        {            //MyCache = HttpContext.Current.Cache;            if (MyCache[key] != null)            {                return true;            }            else            {                return false;            }        }        public static void Add(string key, object obj)        {            MyCache.Add(key, obj, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.High, null);        }        public static void Add(string key, object obj, string file)        {            MyCache.Add(key, obj, new CacheDependency(file), Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, CacheItemPriority.High, null);        }        public static void Remove(string key)        {            MyCache.Remove(key);        }        public static object Get(string key)        {            return MyCache[key];        }        /// <summary>        /// 加时间限制的cache 6 hours        /// </summary>        /// <param name="key">键值</param>        /// <param name="obj">值,对象类型</param>        public static void AddCache(string key, object obj)        {            MyCache.Add(key, obj, null, DateTime.Now.AddHours(6), TimeSpan.Zero, CacheItemPriority.High, null);        }        /// <summary>        /// 加时间限制的cache，单位小时        /// </summary>        /// <param name="key"></param>        /// <param name="obj"></param>        /// <param name="hours"></param>        public static void AddCache(string key, object obj, int hours)        {            MyCache.Add(key, obj, null, DateTime.Now.AddHours(hours), TimeSpan.Zero, CacheItemPriority.High, null);        }    }}

由于

HttpContext 相关的属于web功能，nuint 测试框架本身不支持，后来查资料发现可以在测试中直接new 出 HttpContent,这样就可以进行单元测试了，

代码如下：

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading;using System.Threading.Tasks;using System.Web;using System.Web.Hosting;using Lib.Csharp.Tools;using NUnit.Framework;namespace Lib.Csharp.ToolsTests{    [TestFixture()]    public class AppCacheTests    {        private string cacheKey = "Test-Key";        private string cacheValue = "Test-Value";        private string cacheKey2 = "Test-Key2";        private string cacheValue2 = "Test-Value2";        /// <summary>        /// 全局setup,不能使用async        /// </summary>        [TestFixtureSetUp]        public void TestFixtureSetUp()        {            Thread.GetDomain().SetData(".appPath", "c:\\inetpub\\wwwroot\\webapp\\");            Thread.GetDomain().SetData(".appVPath", "/");            TextWriter tw = new StringWriter();            String address = "home.myspace.cn";            HttpWorkerRequest wr = new SimpleWorkerRequest("default.aspx", "friendId=1300000000", tw);            HttpContext.Current = new HttpContext(wr);        }        /// <summary>        /// 每次测试setup,不能使用async        /// </summary>        [SetUp]        public void SetUp()        {                         AppCache.Remove(cacheKey);        }        [Test()]        public void IsExistTest()        {            var isHave = AppCache.IsExist(cacheKey);            Assert.IsFalse(isHave);            AppCache.AddCache(cacheKey, cacheValue);            isHave = AppCache.IsExist(cacheKey);            Assert.IsTrue(isHave);        }        [Test()]        public void AddTest()        {            AppCache.Add(cacheKey, cacheValue);            var result = AppCache.Get(cacheKey);            Assert.AreEqual(result.ToString(), cacheValue);        }        [Test()]        public void AddTest1()        {            AppCache.AddCache(cacheKey, cacheValue);            var result = AppCache.Get(cacheKey);            Assert.AreEqual(result.ToString(), cacheValue);            AppCache.AddCache(cacheKey2, cacheValue2);            var result2 = AppCache.Get(cacheKey2);            Assert.AreEqual(result2.ToString(), cacheValue2);        }        [Test()]        public void RemoveTest()        {            AppCache.AddCache(cacheKey, cacheValue);            var isHave = AppCache.IsExist(cacheKey);            Assert.IsTrue(isHave);            AppCache.Remove(cacheKey);            isHave = AppCache.IsExist(cacheKey);            Assert.IsFalse(isHave);        }           }}

说明：

 public void TestFixtureSetUp()        {            Thread.GetDomain().SetData(".appPath", "c:\\inetpub\\wwwroot\\webapp\\");  //这个设置里的值不重要            Thread.GetDomain().SetData(".appVPath", "/");  //这个设置里的值不重要</span><span style="white-space:pre"></span>            TextWriter tw = new StringWriter();            String address = "home.myspace.cn";            HttpWorkerRequest wr = new SimpleWorkerRequest("default.aspx", "friendId=1300000000", tw);  //这个设置里的值不重要            HttpContext.Current = new HttpContext(wr);        }

有了HttpContext后，测试就没问题了，不让 HttpContext为null就可以