流水线预期失败后如何正常显示测试结果？

问题分析 #

• 测试结果不显示：RunTests阶段生成的测试结果文件无法在Publish阶段被读取，因为不同阶段的Agent工作目录相互隔离，文件不能直接跨阶段访问。
• 流水线标记失败：Publish阶段的PublishTestResults@2任务设置了failTaskOnFailedTests: true，只要存在测试失败就会触发任务失败，进而导致整个流水线被标记为失败。

修复方案 #

1. 跨阶段传递测试结果文件 #

在RunTests阶段执行测试后，添加PublishPipelineArtifact任务将测试结果文件夹上传为流水线工件，让Publish阶段可以下载后再发布结果。

2. 控制流水线失败标记（按需选择） #

如果希望即使测试失败，流水线仍标记为成功，可将PublishTestResults@2的failTaskOnFailedTests改为false，或者给该任务添加continueOnError: true。

3. 清理冗余任务 #

• 删除CopyThirdParty阶段中空的CmdLine@2任务
• 删除Build阶段Configure任务中重复的CMake配置步骤
• 在RunTests的PowerShell脚本中先创建TestResults文件夹，避免因文件夹不存在导致无法生成测试报告

修改后的完整YAML配置 #

trigger: none
# Variable to store where the initial code checkout path
variables:
- name: BuildDir
  value: Test

stages:

  - stage: Checkout
    pool: $(PoolName)
    jobs:
      - job: CheckoutRedwoodAndSealink
        displayName: Checking out
        steps:
          - checkout: git://Redwood/Redwood@working/conifer
            path: 'Redwood'
            displayName: Checking out Redwood
          - checkout: self
            path: 'Sealink'
            displayName: Checking out Sealink
          - task: PowerShell@2
            displayName: Change the value of BuildDir
            # Store the checkout location
            inputs:
              targetType: 'inline'
              script: 'Write-Host "##vso[task.setvariable variable=BuildDir;isOutput=true]$(Agent.BuildDirectory)"'
            name: setvar 

  - stage: CopyThirdParty
    dependsOn: Checkout
    pool: $(PoolName)
    variables:
      # Set the build directory
      BuildDir: $[stageDependencies.Checkout.CheckoutRedwoodAndSealink.outputs['setvar.BuildDir'] ]

    jobs:
      - job: CopyRedwoodTP
        displayName: Copying Redwood Third Party 
        steps:
        - checkout: none
        - task: CopyFiles@2
          inputs:
            SourceFolder: 'C:\Redwood\third-party'
            Contents: '**'
            TargetFolder: '$(BuildDir)\Redwood\third-party'
            OverWrite: true

  - stage: Build
    dependsOn: 
      - Checkout
      - CopyThirdParty
    pool: $(PoolName)
    variables:
      # Set the build directory
      BuildDir: $[stageDependencies.Checkout.CheckoutRedwoodAndSealink.outputs['setvar.BuildDir'] ]
    jobs:      
    - job: Configure
      displayName: Configuring CMake
      steps:
        - checkout: none
        
        - task: CMake@1
          inputs:
              cmakeArgs: -S ./ -B ./build
              workingDirectory: $(BuildDir)/Sealink
    - job: Build
      displayName: Building
      dependsOn: Configure
      steps:
        - checkout: none
        
        - task: CMake@1
          inputs:
              cmakeArgs: '--build ./build --config Debug'
              workingDirectory: $(BuildDir)/Sealink
          continueOnError: true
    # if first build failed - try again      
    - job: Build2
      condition: failed()
      dependsOn: Build 
      steps:
        - checkout: none 
        - task: CMake@1
          displayName: Configuring CMake (2)
          inputs:
              cmakeArgs: -S ./ -B ./build
              workingDirectory: $(BuildDir)/Sealink
        - task: CMake@1
          displayName: Building (2)
          inputs:
              cmakeArgs: '--build ./build --config Debug'
              workingDirectory: $(BuildDir)/Sealink

  - stage: RunTests
    pool: $(PoolName)
    dependsOn: 
      - Build
      - Checkout
    variables:
      BuildDir: $[stageDependencies.Checkout.CheckoutRedwoodAndSealink.outputs['setvar.BuildDir'] ]
    jobs:
      - job: RunTests
        displayName: Running Unit Tests
        continueOnError: true
        steps:
        - checkout: none
        - task: PowerShell@2
          inputs:
            targetType: 'inline'
            script: |
              # 创建测试结果文件夹
              New-Item -ItemType Directory -Path ./TestResults -Force
              # 执行测试并生成报告
              $(BuildDir)/Sealink/build/UnitTesting/Debug/Test.exe --gtest_output="xml:./TestResults/"
        # 上传测试结果为流水线工件
        - task: PublishPipelineArtifact@1
          inputs:
            targetPath: './TestResults'
            artifact: 'TestResults'
            publishLocation: 'Container'
            
  - stage: Publish
    pool: $(PoolName)
    dependsOn: 
      - RunTests
      - Checkout
    jobs:
      - job: publish
        steps:
        - checkout: none
        # 下载测试结果工件
        - task: DownloadPipelineArtifact@2
          inputs:
            artifact: 'TestResults'
            path: '$(System.DefaultWorkingDirectory)/TestResults'
        - task: PublishTestResults@2
          displayName: Publishing unit test results
          inputs:
            testResultsFormat: 'JUnit'
            testResultsFiles: '*.xml'
            searchFolder: '$(System.DefaultWorkingDirectory)/TestResults'
            # 根据需求设置：如果允许测试失败但流水线成功，改为false
            failTaskOnFailedTests: false              

内容的提问来源于stack exchange，提问作者RoachFIsher