如果我正在使用MSTest，有沒有一種方法可以在Visual Studio中測試代碼覆蓋率？或者我必須購買NCover？MSTest代碼覆蓋率
如果微軟沒有提供內置的工具來執行代碼覆蓋，NCover企業是否值得這些錢或者是舊的beta版？
編輯： VS產品和說明的包括代碼覆蓋率 http://www.microsoft.com/visualstudio/en-us/products/teamsystem/default.mspx
TestDriven.NET（http://testdriven.net/）如果你的VS版本不支持它可以使用。
是的，您可以從Visual Studio中找到代碼覆蓋率信息，前提是您擁有提供該功能的Visual Studio版本，例如Team System。 在VS.NET中設置單元測試時，將創建並添加localtestrun.testrunconfig文件作爲解決方案的一部分。雙擊該文件並在對話框左側找到選項代碼覆蓋選項。選擇要爲其收集代碼覆蓋率信息的程序集，然後重新運行單元測試。代碼覆蓋率信息將被收集並可用。要獲取代碼覆蓋率信息，請打開測試結果窗口，然後單擊代碼覆蓋率結果按鈕，該按鈕將打開一個包含結果的替代窗口。
MSTest包含代碼覆蓋率，至少它在我的VS版本中有。但是，您需要在testrunconfig中啓用該工具，該工具只是醜陋的，並且是主要的PITA。
更簡單的選擇是使用TestDriven.NET，它可以自動覆蓋，即使是MSTest。而且由於它使用了MSTest核心，所以你仍然可以獲得所有VS的優點，如着色（覆蓋代碼的紅色/藍色線條）。見here（包括截屏），或者由於圖像勝過千言萬語：
如果你沒有Visual Studio的終極版，您還可以使用此MSBuild任務來生成代碼覆蓋率報告。
對於未來的讀者：
哇，這是不好玩。我希望這可以幫助那些在互聯網領域的人。
請注意，「CodeCoverage.exe」的存在可能取決於您擁有的Visual Studio版本。你可能需要在構建服務器上安裝VS（某些增強版本）。
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"
您還可以在3個UnitTests.dlls合併成一個呼叫
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
我還發現，在互聯網上的一些XSL。 （以下3個環節都是大同小異的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
我在這裏張貼了xsl 「以防萬一」，在未來的URL的模。 將下面的xsl放入名爲「VSCoverageToHtml.xsl」的文件（如上所述）。
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" indent="yes"/>
<xsl:template match="/" >
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"/>
<style type="text/css">
th {
background-color:#dcdcdc;
border:solid 1px #a9a9a9;
text-indent:2pt;
font-weight:bolder;
}
#data {
text-align: center;
}
</style>
<script language="JavaScript" type="text/javascript" >
function CreateJavescript(){
var fileref=document.createElement('script');
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", "script1.js");
document.getElementsByTagName("head")[0].appendChild(fileref);
}
function toggleDetail(control) {
var ctrlId = $(control).attr('Id');
$("tr[id='"+ctrlId +"']").toggle();
}
</script>
<title>Code Coverage Report</title>
</head>
<body onload='CreateJavescript()' >
<h1>Code Coverage Report</h1>
<table border="1">
<tr>
<th colspan="3"/>
<th>Name</th>
<th>Blocks Covered</th>
<th>Blocks Not Covered</th>
<th>Coverage</th>
</tr>
<xsl:apply-templates select="//CoverageDSPriv/Module" />
</table>
</body>
</html>
</xsl:template>
<xsl:template match="Module">
<xsl:variable name="parentId" select="generate-id(./..)" />
<xsl:variable name="currentId" select="generate-id(.)" />
<tr id="{$parentId}">
<td id="{$currentId}" colspan="3" onClick="toggleDetail(this)" onMouseOver="this.style.cursor= 'pointer' ">[+]</td>
<td>
<xsl:value-of select="ModuleName" />
</td>
<td id="data">
<xsl:value-of select="BlocksCovered" />
</td>
<td id="data">
<xsl:value-of select="BlocksNotCovered" />
</td>
<xsl:call-template name="CoverageColumn">
<xsl:with-param name="covered" select="BlocksCovered" />
<xsl:with-param name="uncovered" select="BlocksNotCovered" />
</xsl:call-template>
</tr>
<xsl:apply-templates select="NamespaceTable" />
<tr id="{$currentId}-end" style="display: none;">
<td colspan="5"/>
</tr>
</xsl:template>
<xsl:template match="NamespaceTable">
<xsl:variable name="parentId" select="generate-id(./..)" />
<xsl:variable name="currentId" select="generate-id(.)" />
<tr id="{$parentId}" style="display: none;">
<td> - </td>
<td id="{$currentId}"
colspan="2"
onClick="toggleDetail(this)"
onMouseOver="this.style.cursor= 'pointer' ">[+]</td>
<td>
<xsl:value-of select="NamespaceName" />
</td>
<td id="data">
<xsl:value-of select="BlocksCovered" />
</td>
<td id="data">
<xsl:value-of select="BlocksNotCovered" />
</td>
<xsl:call-template name="CoverageColumn">
<xsl:with-param name="covered" select="BlocksCovered" />
<xsl:with-param name="uncovered" select="BlocksNotCovered" />
</xsl:call-template>
</tr>
<xsl:apply-templates select="Class" />
<tr id="{$currentId}-end" style="display: none;">
<td colspan="5"/>
</tr>
</xsl:template>
<xsl:template match="Class">
<xsl:variable name="parentId" select="generate-id(./..)" />
<xsl:variable name="currentId" select="generate-id(.)" />
<tr id="{$parentId}" style="display: none;">
<td> - </td>
<td> - </td>
<td id="{$currentId}"
onClick="toggleDetail(this)"
onMouseOver="this.style.cursor='pointer' ">[+]</td>
<td>
<xsl:value-of select="ClassName" />
</td>
<td id="data">
<xsl:value-of select="BlocksCovered" />
</td>
<td id="data">
<xsl:value-of select="BlocksNotCovered" />
</td>
<xsl:call-template name="CoverageColumn">
<xsl:with-param name="covered" select="BlocksCovered" />
<xsl:with-param name="uncovered" select="BlocksNotCovered" />
</xsl:call-template>
</tr>
<xsl:apply-templates select="Method" />
<tr id="{$currentId}-end" style="display: none;">
<td colspan="5"/>
</tr>
</xsl:template>
<xsl:template match="Method">
<xsl:variable name="parentId" select="generate-id(./..)" />
<tr id="{$parentId}" style="display: none;">
<td> -</td>
<td> - </td>
<td> - </td>
<td>
<xsl:value-of select="MethodName" />
</td>
<td id="data">
<xsl:value-of select="BlocksCovered" />
</td>
<td id="data">
<xsl:value-of select="BlocksNotCovered" />
</td>
<xsl:call-template name="CoverageColumn">
<xsl:with-param name="covered" select="BlocksCovered" />
<xsl:with-param name="uncovered" select="BlocksNotCovered" />
</xsl:call-template>
</tr>
</xsl:template>
<xsl:template name="CoverageColumn">
<xsl:param name="covered" select="0" />
<xsl:param name="uncovered" select="0" />
<td id="data">
<xsl:variable name="percent"
select="($covered div ($covered + $uncovered)) * 100" />
<xsl:attribute name="style">
background-color:
<xsl:choose>
<xsl:when test="number($percent >= 90)">#86ed60;</xsl:when>
<xsl:when test="number($percent >= 70)">#ffff99;</xsl:when>
<xsl:otherwise>#FF7979;</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:if test="$percent > 0">
<xsl:value-of select="format-number($percent, '###.##')" />%
</xsl:if>
<xsl:if test="$percent = 0">
<xsl:text>0.00%</xsl:text>
</xsl:if>
</td>
</xsl:template>
</xsl:stylesheet>
這是一個小型的命令行工具來幫助。
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 <destinationfile> <sourcefile1> <sourcefile2> ... <sourcefileN>");
return 1;
}
string destinationFile = args[0];
//destinationFile = @"C:\TestResults\MySuperMergedCoverage.coverage.converted.to.xml";
List<string> sourceFiles = new List<string>();
//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<string> 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;
}
}
}
另見：
Code Coverage files merging using code in VS 2012 Dynamic Code Coverage
鏈接斷開。這就是爲什麼只有鏈接的答案被壓低。 – James 2017-10-07 21:41:07