如何从 Visual Studio 2022 社区版的单元测试中获取代码覆盖率？

Posted 2023-02-19

【中文标题】如何从 Visual Studio 2022 社区版的单元测试中获取代码覆盖率？

【英文标题】：How to get Code Coverage from Unit Tests in Visual Studio 2022 Community Edition?

【发布时间】：2022-01-16 03:31:19

【问题描述】：

我已经下载了最新的 VS2022 v17.1 社区版，它没有内置代码覆盖。我已经习惯了企业版，我能找到的只是社区版的付费选项。

是否可以免费在 VS2022 社区版中进行代码覆盖？

【参考方案1】：

您拥有使用 VS 2022 的 Fine Code Coverage，您可以在此处访问它 https://github.com/FortuneN/FineCodeCoverage/releases，点击2022文件。

之后，它只是您安装在计算机上的一个插件，它可用于每个项目，而无需逐个项目添加。

【参考方案2】：

看来我很幸运！ XUnit 测试项目带有一个 NuGet 插件Coverlet.Collector：

这不需要安装在任何项目中，您只需运行我在 Powershell 脚本中制作的这些步骤：

ExecCodeCoverage.ps1

# PURPOSE: Automates the running of Unit Tests and Code Coverage
# REF: https://***.com/a/70321555/495455

# If running outside the test folder
#cd E:\Dev\XYZ\src\XYZTestProject

# This only needs to be installed once (globally), if installed it fails silently: 
dotnet tool install -g dotnet-reportgenerator-globaltool

# Save currect directory into a variable
$dir = pwd

# Delete previous test run results (there's a bunch of subfolders named with guids)
Remove-Item -Recurse -Force $dir/TestResults/

# Run the Coverlet.Collector (this is an NuGet included with XUnit Test Projects)
$output = [string] (& dotnet test --collect:"XPlat Code Coverage" 2>&1)
Write-Host "Last Exit Code: $lastexitcode"
Write-Host $output

# Extract the GUID from the Output eg, 
#"Attachments:   E:\Dev\XYZ\src\XYZTestProject\TestResults\0f26f16d-bbe8-463b-856b-6d4fbee673bd\coverage.cobertura.xml Passed!"  

$i = $output.LastIndexOf("TestResults") + 11
$j = $output.LastIndexOf("coverage")
$cmdGuid = $output.SubString($i,$j - $i - 1)
Write-Host $cmdGuid 

# Delete previous test run reports - note if you're getting wrong results do a Solution Clean and Rebuild to remove stale DLLs in the bin folder
Remove-Item -Recurse -Force $dir/coveragereport/

# To keep a history of the Code Coverage we need to use the argument:
# -historydir:SOME_DIRECTORY 
if (!(Test-Path -path $dir/CoverageHistory))   
 New-Item -ItemType directory -Path $dir/CoverageHistory


# Generate the Code Coverage html Report
reportgenerator -reports:"$dir/TestResults/$cmdGuid/coverage.cobertura.xml" -targetdir:"coveragereport" -reporttypes:Html -historydir:$dir/CoverageHistory 

# Open the Code Coverage HTML Report (if running on a WorkStation)
$osInfo = Get-CimInstance -ClassName Win32_OperatingSystem
if ($osInfo.ProductType -eq 1) 
(& "$dir/coveragereport/index.html")

把它放在TestProject中：

结果非常好（免费）：

您可以深入查看突出显示的线路覆盖范围，它只是不如企业版强大或集成：

我也更新了脚本以支持历史记录：