Specflow - GenerateFeatureFileCodeBehindTask意外失败

Question

我对SpecFlow有个问题。我们正在使用Azure Devops，当我在我的本地机器上构建解决方案时，它工作得很好，但在Azure Devops构建期间，我得到了以下错误：

[error]C:\Windows\ServiceProfiles\NetworkService\.nuget\packages\specflow.tools.msbuild.generation\3.1.86\build\SpecFlow.Tools.MsBuild.Generation.targets(93,5): Error MSB4018: The "GenerateFeatureFileCodeBehindTask" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load file or assembly 'TechTalk.SpecFlow, Version=3.1.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'. The system cannot find the file specified.
File name: 'TechTalk.SpecFlow, Version=3.1.0.0, Culture=neutral, PublicKeyToken=0778194805d6db41'
   at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
   at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
   at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(MetadataToken caCtorToken, MetadataImport& scope, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1& derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg)
   at System.Reflection.CustomAttribute.AddCustomAttributes(ListBuilder`1& attributes, RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, ListBuilder`1 derivedAttributes)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType)
   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
   at System.Reflection.RuntimeAssembly.GetCustomAttributes(Type attributeType, Boolean inherit)
   at System.Attribute.GetCustomAttributes(Assembly element, Type attributeType, Boolean inherit)
   at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType, Boolean inherit)
   at System.Attribute.GetCustomAttribute(Assembly element, Type attributeType)
   at TechTalk.SpecFlow.Generator.Plugins.GeneratorPluginLoader.LoadPlugin(PluginDescriptor pluginDescriptor)
   at TechTalk.SpecFlow.Generator.GeneratorContainerBuilder.LoadPlugins(ObjectContainer container, GeneratorPluginEvents generatorPluginEvents, UnitTestProviderConfiguration unitTestProviderConfiguration, IEnumerable`1 generatorPlugins)
   at TechTalk.SpecFlow.Generator.GeneratorContainerBuilder.CreateContainer(SpecFlowConfigurationHolder configurationHolder, ProjectSettings projectSettings, IEnumerable`1 generatorPluginInfos, IObjectContainer parentObjectContainer)
   at SpecFlow.Tools.MsBuild.Generation.WrappedGeneratorContainerBuilder.BuildGeneratorContainer(SpecFlowConfigurationHolder specFlowConfigurationHolder, ProjectSettings projectSettings, IReadOnlyCollection`1 generatorPluginInfos, IObjectContainer rootObjectContainer)
   at SpecFlow.Tools.MsBuild.Generation.GenerateFeatureFileCodeBehindTaskExecutor.Execute()
   at SpecFlow.Tools.MsBuild.Generation.GenerateFeatureFileCodeBehindTask.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)

        <PackageReference Include="FluentAssertions" Version="5.10.2" />
        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
        <PackageReference Include="MSTest.TestAdapter" Version="2.1.0" />
        <PackageReference Include="MSTest.TestFramework" Version="2.1.0" />
        <PackageReference Include="NUnit" Version="3.12.0" />
        <PackageReference Include="Selenium.Support" Version="3.141.0" />
        <PackageReference Include="Selenium.WebDriver" Version="3.141.0" />
        <PackageReference Include="SpecFlow" Version="3.1.86" />
        <PackageReference Include="SpecFlow.MsTest" Version="3.1.86" />
        <PackageReference Include="SpecFlow.Tools.MsBuild.Generation" Version="3.1.86" />

我试过在nUnit，MsTest，xUnit上使用它，但总是失败。目标框架：.NET核心3.1。构建代理: vs2019-win2019

Answer 1

我们也遇到过同样的问题，经过更长时间的挖掘，我发现在他们的git repo https://github.com/SpecFlowOSS/SpecFlow/issues/1912中有一个为此而创建的问题。引用自git问题：

MSBuild 16.5为可能有副作用的任务提供了一种新的程序集加载方法。你可以尝试设置MSBUILDSINGLELOADCONTEXT=1 (env var)来获得旧的行为。

尝试在您的构建管道中将其设置为：

 variables:
    ...
    MSBUILDSINGLELOADCONTEXT: '1'
    ...

这对我们的情况很有帮助。

编辑:此问题似乎已在较新版本的SpecFlow (3.3.15+)中修复。

Answer 2

也有同样的问题，原来是.net核心软件开发工具包和Specflow之间的版本问题。我们将.net核心软件开发工具包降级到3.1.102，这对我们很有帮助

Answer 3

从SpecFlow 2迁移后，SpecFlow 3.4.8也出现了同样的问题。

自After version SpecFlow 3.3.30 don’t need to add the SpecFlow.Tools.MSBuild.Generation package anymore以来

所以我删除了SpecFlow.Tools.MSBuild.Generation包，但是问题仍然存在。

在那之后，我将specflow.json添加到测试项目中，问题就消失了。