.NET 4.7.2单元测试IEnumerable在Azure DevOps流水线中异常

问题背景 #

我有一个基于xUnit、.NET 4.7.2的单元测试，用于测试自定义的IEnumerable处理函数，断言语句如下：

adt.PatientVisitInformation.First().AssignedPatientLocation.Facility.Value.ShouldBe("Arundel");

该测试在本地Visual Studio中运行正常，但在Azure DevOps流水线（使用ubuntu-latest虚拟机镜像）执行时抛出异常。

错误信息 #

Error Message:
System.InvalidOperationException : Sequence contains no elements
Stack Trace:
at System.Linq.Enumerable.First[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x00010] in <69ada62907b24213a012734531df1db1>:0
at My.Products.HL7.Parser.UnitTests.Definitions.Messages.ADT_ATests.Decode_ADTAMessage (System.String ADT) [0x00321] in <36abcadd6a6a4eadb1f459337a2a48d7>:0
at (wrapper managed-to-native) System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo,object,object[],System.Exception&)
at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0006a] in :0
Failed My.Products.HL7.Parser.UnitTests.Definitions.Messages.ADT_ATests.Decode_ADTAMessage(ADT: "ADT^A01") [7 ms]

流水线中IEnumerable返回内容 #

System.Linq.Enumerable+<OfTypeIterator>d__32`1[My.Products.HL7.Parser.Definitions.Segments.PV1]

Azure DevOps流水线任务配置 #

- task: UseDotNet@2
  inputs:
    packageType: 'sdk'
    version: '8.x'  # Specify the .NET SDK version
    installationPath: $(Agent.ToolsDirectory)/dotnet

- task: UseDotNet@2
  inputs:
    packageType: 'sdk'
    version: '6.0.x'  # Optional: If you need a .NET 6 SDK for any reason
    installationPath: $(Agent.ToolsDirectory)/dotnet

- script: dotnet nuget locals all --clear
  displayName: 'Clear NuGet caches'

- task: DotNetCoreCLI@2
  displayName: 'Restore NuGet Packages'
  inputs:
    command: 'restore'
    projects: '**Integrations/**/*.csproj'

- task: DotNetCoreCLI@2
  displayName: 'Build Function - Custom Function'
  inputs:
    command: 'build'
    projects: '**Integrations/**/*.csproj'
    arguments: '/p:LogicAppFolder=Test-Interface-LogicApp\LogicApp-${{parameters.testInterface}}'

- task: DotNetCoreCLI@2
  displayName: 'Test Custom Functions'
  inputs:
    command: test
    projects: |
      **Integrations/**/*.UnitTests.csproj
    arguments: '--logger "console;verbosity=detailed"'
    publishTestResults: true

使用的虚拟机镜像为ubuntu-latest

内容的提问来源于stack exchange，提问作者Joy Alecha