如果我正在使用MSTest,有没有办法测试visual studio中的代码覆盖率？或者我必须购买NCover？

如果微软没有提供内置工具来进行代码覆盖,那么NCover Enterprise是否物有所值,或者旧的测试版是否足够好？

编辑:VS产品的描述以及哪些包括代码覆盖率 https://www.visualstudio.com/vs/compare/

如果您的VS版本不支持,可以使用TestDriven.NET(http://testdriven.net/).

是的,您可以在Visual Studio中找到代码覆盖率信息,前提是您有一个提供该功能的Visual Studio版本,例如Team System.在VS.NET中设置单元测试时,将创建localtestrun.testrunco​​nfig文件并将其作为解决方案的一部分添加.双击此文件,找到对话框左侧的"代码覆盖率"选项.选择要为其收集代码覆盖率信息的程序集,然后重新运行单元测试.代码覆盖率信息将被收集并可用.要获取代码覆盖率信息,请打开测试结果窗口,然后单击代码覆盖率结果按钮,这将打开包含结果的备用窗口.

MSTest包括代码覆盖率,至少它在VS的版本中有.但是,您需要在testrunco​​nfig中启用检测,这只是丑陋而且是主要的PITA.

一个更容易的选择是使用TestDriven.NET,它可以自动覆盖,甚至对于MSTest.而且由于它使用了MSTest核心,你仍然可以获得所有的VS优点,例如着色(覆盖代码的红/蓝线).看这里(包括截屏视频),或者因为图像说千言万语:

_{(来源:mutantdesign.co.uk)}

对于未来的读者:

哇,这不好玩.我希望这可以帮助那些在互联网上的人.

请注意,"CodeCoverage.exe"的存在可能取决于您拥有的Visual Studio版本.您可能必须在构建服务器中安装VS(某些增强版本).

set __msTestExe=C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\MSTest.exe
set __codeCoverageExe=C:\Program Files (x86)\Microsoft Visual Studio 14.0\Team Tools\Dynamic Code Coverage Tools\CodeCoverage.exe

rem (the below is a custom C# console application, code seen below)
set __customCodeCoverageMergerExe=CoverageCoverterConsoleApp.exe

rem below exe is from https://www.microsoft.com/en-us/download/details.aspx?id=21714 
set __msXslExe=C:\MyProgFiles\MsXslCommandLine\msxsl.exe

REM the below calls will create the binary *.coverage files
"%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\AAA_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.One.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.One.trx"
"%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\BBB_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Two.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.Two.trx"
"%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\CCC_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Three.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.Three.trx"


rem below, the first argument is the new file, the 2nd through "N" args are the result-files from the three "%__codeCoverageExe%" collect above
rem this will take the three binary *.coverage files and turn them into one .xml file
"%__customCodeCoverageMergerExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\TestResults\AAA_DynamicCodeCoverage.coverage" "D:\BuildStuff\TestResults\BBB_DynamicCodeCoverage.coverage" "D:\BuildStuff\TestResults\CCC_DynamicCodeCoverage.coverage"


"%__msXslExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\Xsl\VSCoverageToHtml.xsl" -o "D:\BuildStuff\TestResults\CodeCoverageReport.html"

您还可以将3个UnitTests.dlls组合成一个调用

REM the below calls will create the binary *.coverage files
"%__codeCoverageExe%" collect /output:"D:\BuildStuff\TestResults\ZZZ_DynamicCodeCoverage.coverage" "%__msTestExe%" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.One.dll" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Two.dll" /testcontainer:"D:\BuildStuff\BuildResults\My.UnitTests.Three.dll" /resultsfile:"D:\BuildStuff\TestResults\My.UnitTests.AllOfThem.trx"


rem below, the first argument is the new file, the 2nd through "N" args are the result-files from the three "%__codeCoverageExe%" collect above
rem this will take the one binary *.coverage files and turn them into one .xml file
"%__customCodeCoverageMergerExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\TestResults\ZZZ_DynamicCodeCoverage.coverage" 


"%__msXslExe%" "D:\BuildStuff\TestResults\DynamicCodeCoverage.merged.coverage.converted.xml" "D:\BuildStuff\Xsl\VSCoverageToHtml.xsl" -o "D:\BuildStuff\TestResults\CodeCoverageReport.html"

VSCoverageToHtml.xsl

我还在互联网上找到了一些xsl.(下面的3个链接几乎是相同的xsl)

http://codetuner.blogspot.com/2011_09_01_archive.html

http://jp.axtstar.com/?page_id=258

http://codetuner.blogspot.com/2011/09/convert-mstest-code-covarage-results-in.html

我在这里发布xsl"以防万一"这些URL将来会死掉.将下面的xsl放在名为"VSCoverageToHtml.xsl"的文件中(如上所述).

     
    
        
            

                

                
            
            
                
Code Coverage Report
                
                

                    

                        

                        
Name
                        
Blocks Covered
                        
Blocks Not Covered
                        
Coverage
                    
                    
            
        
    

    
        
        
        
            [+]
            
                
            
            
                
            
            
                
            
            
                
                
            
        
        
        
            
        
    

    
        
        
        
             - 
            [+]
            
                
            
            
                
            
            
                
            
            
                
                
            
        
        
        
            
        
    

    
        
        
        
             - 
             - 
            [+]
            
                
            
            
                
            
            
                
            
            
                
                
            
        
        
        
            
        
    

    
        
        
             -
             - 
             - 
            
                
            
            
                
            
            
                
            
            
                
                
            
        
    

    
        
        
        
            
                            
                background-color:
                
                    #86ed60;
                    #ffff99;
                    #FF7979;
                
            
            
                %
            
            
                0.00%
            
        
    

这是一个小的命令行工具来帮助.

https://www.microsoft.com/en-us/download/details.aspx?id=21714

using System;

using Microsoft.VisualStudio.Coverage.Analysis;
using System.Collections.Generic;

/* References
\ThirdPartyReferences\Microsoft Visual Studio 11.0\Microsoft.VisualStudio.Coverage.Analysis.dll
\ThirdPartyReferences\Microsoft Visual Studio 11.0\Microsoft.VisualStudio.Coverage.Interop.dll
*/

namespace MyCompany.VisualStudioExtensions.CodeCoverage.CoverageCoverterConsoleApp
{
    class Program
    {
        static int Main(string[] args)
        {
            if (args.Length < 2)
            {
                Console.WriteLine("Coverage Convert - reads VStest binary code coverage data, and outputs it in XML format.");
                Console.WriteLine("Usage:  ConverageConvert    ... ");
                return 1;
            }

            string destinationFile = args[0];
            //destinationFile = @"C:\TestResults\MySuperMergedCoverage.coverage.converted.to.xml";

            List sourceFiles = new List();

            //files.Add(@"C:\MyCoverage1.coverage");
            //files.Add(@"C:\MyCoverage2.coverage");
            //files.Add(@"C:\MyCoverage3.coverage");


            /* get all the file names EXCEPT the first one */
            for (int i = 1; i < args.Length; i++)
            {
                sourceFiles.Add(args[i]);
            }

            CoverageInfo mergedCoverage;
            try
            {
                mergedCoverage = JoinCoverageFiles(sourceFiles);
            }
            catch (Exception e)
            {
                Console.WriteLine("Error opening coverage data: {0}", e.Message);
                return 1;
            }

            CoverageDS data = mergedCoverage.BuildDataSet();

            try
            {
                data.WriteXml(destinationFile);
            }
            catch (Exception e)
            {

                Console.WriteLine("Error writing to output file: {0}", e.Message);
                return 1;
            }

            return 0;
        }

        private static CoverageInfo JoinCoverageFiles(IEnumerable files)
        {
            if (files == null)
                throw new ArgumentNullException("files");

            // This will represent the joined coverage files
            CoverageInfo returnItem = null;
            string path;

            try
            {
                foreach (string sourceFile in files)
                {
                    // Create from the current file

                    path = System.IO.Path.GetDirectoryName(sourceFile);
                    CoverageInfo current = CoverageInfo.CreateFromFile(sourceFile, new string[] { path }, new string[] { path });

                    if (returnItem == null)
                    {
                        // First time through, assign to result
                        returnItem = current;
                        continue;
                    }

                    // Not the first time through, join the result with the current
                    CoverageInfo joined = null;
                    try
                    {
                        joined = CoverageInfo.Join(returnItem, current);
                    }
                    finally
                    {
                        // Dispose current and result
                        current.Dispose();
                        current = null;
                        returnItem.Dispose();
                        returnItem = null;
                    }

                    returnItem = joined;
                }
            }
            catch (Exception)
            {
                if (returnItem != null)
                {
                    returnItem.Dispose();
                }
                throw;
            }

            return returnItem;
        }
    }
}

另见:

使用VS 2012动态代码覆盖率中的代码合并代码覆盖率文件