【发布时间】：2020-07-24 20:28:24
【问题描述】：
我无法使用 MSTest 对 Entity Framework Core 项目进行单元测试。
当我这样做时，我在执行测试时总是得到以下异常：
Test method "EF_Tests.CreateDbTests.CreateDb" threw exception:
System.IO.FileLoadException: Could not load file or assembly "System.Threading.Tasks.Extensions, Version=4.2.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51" or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
我做错了什么？
这是我的项目结构和设置：
这是我的项目文件的内容：
Repository.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="System.ComponentModel.Annotations" Version="4.7.0" />
</ItemGroup>
</Project>
EF-DB.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<RootNamespace>EF_DB</RootNamespace>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
<DebugType>none</DebugType>
<DebugSymbols>false</DebugSymbols>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.6" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.6" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\Repository\Repository.csproj" />
</ItemGroup>
</Project>
EF-Tests.csproj
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{538D0C25-637D-4CDF-BDBC-26AEEB9117FD}</ProjectGuid>
<OutputType>Library</OutputType>
<AppDesignerFolder>Properties</AppDesignerFolder>
<RootNamespace>EF_Tests</RootNamespace>
<AssemblyName>EF-Tests</AssemblyName>
<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
<FileAlignment>512</FileAlignment>
<ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
<VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">15.0</VisualStudioVersion>
<VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
<ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT\$(VisualStudioVersion)\UITestExtensionPackages</ReferencePath>
<IsCodedUITest>False</IsCodedUITest>
<TestProjectType>UnitTest</TestProjectType>
<NuGetPackageImportStamp>
</NuGetPackageImportStamp>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<Optimize>false</Optimize>
<OutputPath>bin\Debug\</OutputPath>
<DefineConstants>DEBUG;TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<DebugType>none</DebugType>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DefineConstants>TRACE</DefineConstants>
<ErrorReport>prompt</ErrorReport>
<WarningLevel>4</WarningLevel>
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
</PropertyGroup>
<PropertyGroup>
<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
</PropertyGroup>
<ItemGroup>
<Reference Include="System" />
<Reference Include="System.Core" />
</ItemGroup>
<ItemGroup>
<Compile Include="CreateDbTests.cs" />
<Compile Include="Properties\AssemblyInfo.cs" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\EF-DB\EF-DB.csproj">
<Project>{c6c34842-8e25-4bcb-a20a-6c415baa008e}</Project>
<Name>EF-DB</Name>
</ProjectReference>
<ProjectReference Include="..\Repository\Repository.csproj">
<Project>{b4e6eeda-2439-4674-b127-0fbf91b90a08}</Project>
<Name>Repository</Name>
</ProjectReference>
</ItemGroup>
<ItemGroup>
<PackageReference Include="MSTest.TestAdapter">
<Version>2.1.2</Version>
</PackageReference>
<PackageReference Include="MSTest.TestFramework">
<Version>2.1.2</Version>
</PackageReference>
</ItemGroup>
<Import Project="$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets" Condition="Exists('$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets')" />
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>
【问题讨论】：
-
请显示您的 csproj 文件的内容。
-
@granadaCoder：感谢您回答我的问题。我现在添加了 .csproj 文件的内容。
标签： mstest entity-framework-core-3.1