我有一个基于LibCurl的客户端程序。我遇到过某种情况，在某些情况下，服务器上的程序运行时间超过配置的IIS超时。 IIS然后终止程序并向客户端返回502错误状态。
我已将代码添加到客户端以捕获此问题。现在，我需要找到一种方法来证明改变是有效的。
我无法可靠地重现该问题，因此没有一个好的测试用例。
有什么建议吗？
答案 0 :(得分：0)
我已经看到很多测试在测试期间启动私有Web服务器，私有Web服务器提供了预期请求和响应的脚本。被测客户端的位会访问专用Web服务器，测试会验证预期的客户端行为。
你可能不需要一个完整的IIS，只需要一个能够提供正确响应的东西。选择一种语言，你会找到一个库（可能还有演示版），用于组合一个简单的Web服务器。
答案 1 :(得分：0)
这以非常简单的方式向您展示了如何在NUnit fixture中嵌入工作进程。
然后，您可以根据需要提供尽可能多的错误。
这是一个示例夹具：
using System.Net;
using NUnit.Framework;
namespace Salient.Excerpts
{
[TestFixture]
public class WebHostServerFixture : WebHostServer
{
[TestFixtureSetUp]
public void TestFixtureSetUp()
{
StartServer(@"..\..\..\..\TestSite");
// is the equivalent of
// StartServer(@"..\..\..\..\TestSite",
// GetAvailablePort(8000, 10000, IPAddress.Loopback, true), "/", "localhost");
}
[TestFixtureTearDown]
public void TestFixtureTearDown()
{
StopServer();
}
[Test]
public void Test()
{
// while a reference to the web app under test is not necessary,
// if you do add a reference to this test project you may F5 debug your tests.
// if you debug this test you will break in Default.aspx.cs
string html = new WebClient().DownloadString(NormalizeUri("Default.aspx"));
}
}
}
这是服务器：
// Project: Salient
// http://salient.codeplex.com
// Date: April 16 2010
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Threading;
using Microsoft.VisualStudio.WebHost;
namespace Salient.Excerpts
{
/// <summary>
/// A general purpose Microsoft.VisualStudio.WebHost.Server test fixture.
/// WebHost.Server is the core of the Visual Studio Development Server (WebDev.WebServer).
///
/// This server is run in-process and may be used in F5 debugging.
/// </summary>
/// <remarks>
/// If you are adding this source code to a new project, You will need to
/// manually add a reference to WebDev.WebHost.dll to your project. It cannot
/// be added from within Visual Studio.
///
/// Please see the Readme.txt accompanying this code for details.
/// </remarks>
/// NOTE: code from various namespaces/classes in the Salient project have been merged into this
/// single class for this post in the interest of brevity
public class WebHostServer
{
private Server _server;
public string ApplicationPath { get; private set; }
public string HostName { get; private set; }
public int Port { get; private set; }
public string VirtualPath { get; private set; }
public string RootUrl
{
get { return string.Format(CultureInfo.InvariantCulture, "http://{0}:{1}{2}", HostName, Port, VirtualPath); }
}
/// <summary>
/// Combine the RootUrl of the running web application with the relative url specified.
/// </summary>
public virtual Uri NormalizeUri(string relativeUrl)
{
return new Uri(RootUrl + relativeUrl);
}
/// <summary>
/// Will start "localhost" on first available port in the range 8000-10000 with vpath "/"
/// </summary>
/// <param name="applicationPath"></param>
public void StartServer(string applicationPath)
{
StartServer(applicationPath, GetAvailablePort(8000, 10000, IPAddress.Loopback, true), "/", "localhost");
}
/// <summary>
/// </summary>
/// <param name="applicationPath">Physical path to application.</param>
/// <param name="port">Port to listen on.</param>
/// <param name="virtualPath">Optional. defaults to "/"</param>
/// <param name="hostName">Optional. Is used to construct RootUrl. Defaults to "localhost"</param>
public void StartServer(string applicationPath, int port, string virtualPath, string hostName)
{
if (_server != null)
{
throw new InvalidOperationException("Server already started");
}
// WebHost.Server will not run on any other IP
IPAddress ipAddress = IPAddress.Loopback;
if(!IsPortAvailable(ipAddress, port))
{
throw new Exception(string.Format("Port {0} is in use.", port));
}
applicationPath = Path.GetFullPath(applicationPath);
virtualPath = String.Format("/{0}/", (virtualPath ?? string.Empty).Trim('/')).Replace("//", "/");
_server = new Server(port, virtualPath, applicationPath, false, false);
_server.Start();
ApplicationPath = applicationPath;
Port = port;
VirtualPath = virtualPath;
HostName = string.IsNullOrEmpty(hostName) ? "localhost" : hostName;
}
/// <summary>
/// Stops the server.
/// </summary>
public void StopServer()
{
if (_server != null)
{
_server.Stop();
_server = null;
// allow some time to release the port
Thread.Sleep(100);
}
}
public void Dispose()
{
StopServer();
}
/// <summary>
/// Gently polls specified IP:Port to determine if it is available.
/// </summary>
/// <param name="ipAddress"></param>
/// <param name="port"></param>
public static bool IsPortAvailable(IPAddress ipAddress, int port)
{
bool portAvailable = false;
for (int i = 0; i < 5; i++)
{
portAvailable = GetAvailablePort(port, port, ipAddress, true) == port;
if (portAvailable)
{
break;
}
// be a little patient and wait for the port if necessary,
// the previous occupant may have just vacated
Thread.Sleep(100);
}
return portAvailable;
}
/// <summary>
/// Returns first available port on the specified IP address.
/// The port scan excludes ports that are open on ANY loopback adapter.
///
/// If the address upon which a port is requested is an 'ANY' address all
/// ports that are open on ANY IP are excluded.
/// </summary>
/// <param name="rangeStart"></param>
/// <param name="rangeEnd"></param>
/// <param name="ip">The IP address upon which to search for available port.</param>
/// <param name="includeIdlePorts">If true includes ports in TIME_WAIT state in results.
/// TIME_WAIT state is typically cool down period for recently released ports.</param>
/// <returns></returns>
public static int GetAvailablePort(int rangeStart, int rangeEnd, IPAddress ip, bool includeIdlePorts)
{
IPGlobalProperties ipProps = IPGlobalProperties.GetIPGlobalProperties();
// if the ip we want a port on is an 'any' or loopback port we need to exclude all ports that are active on any IP
Func<IPAddress, bool> isIpAnyOrLoopBack = i => IPAddress.Any.Equals(i) ||
IPAddress.IPv6Any.Equals(i) ||
IPAddress.Loopback.Equals(i) ||
IPAddress.IPv6Loopback.
Equals(i);
// get all active ports on specified IP.
List<ushort> excludedPorts = new List<ushort>();
// if a port is open on an 'any' or 'loopback' interface then include it in the excludedPorts
excludedPorts.AddRange(from n in ipProps.GetActiveTcpConnections()
where
n.LocalEndPoint.Port >= rangeStart &&
n.LocalEndPoint.Port <= rangeEnd && (
isIpAnyOrLoopBack(ip) || n.LocalEndPoint.Address.Equals(ip) ||
isIpAnyOrLoopBack(n.LocalEndPoint.Address)) &&
(!includeIdlePorts || n.State != TcpState.TimeWait)
select (ushort)n.LocalEndPoint.Port);
excludedPorts.AddRange(from n in ipProps.GetActiveTcpListeners()
where n.Port >= rangeStart && n.Port <= rangeEnd && (
isIpAnyOrLoopBack(ip) || n.Address.Equals(ip) || isIpAnyOrLoopBack(n.Address))
select (ushort)n.Port);
excludedPorts.AddRange(from n in ipProps.GetActiveUdpListeners()
where n.Port >= rangeStart && n.Port <= rangeEnd && (
isIpAnyOrLoopBack(ip) || n.Address.Equals(ip) || isIpAnyOrLoopBack(n.Address))
select (ushort)n.Port);
excludedPorts.Sort();
for (int port = rangeStart; port <= rangeEnd; port++)
{
if (!excludedPorts.Contains((ushort)port))
{
return port;
}
}
return 0;
}
}
}
一个警告：
注意：Microsoft.VisualStudio.WebHost命名空间包含在WebDev.WebHost.dll文件中。此文件位于GAC中，但无法在Visual Studio中添加对此程序集的引用。
要添加引用，您需要在文本编辑器中打开.csproj文件并手动添加引用。
查找包含项目引用的ItemGroup并添加以下元素：
<Reference Include="WebDev.WebHost, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=x86">
<Private>False</Private>
</Reference>
参考：http://www.codeproject.com/KB/aspnet/test-with-vs-devserver-2.aspx