Question

借助Microsoft.AspNetCore.TestHost（2.2.0）NuGet，借助带有单元测试（MSTest 1.3.2）的完整.NET Framework（4.7.2）对Asp.NetCore（2.2）进行测试时，收到以下异常

System.IO.FileNotFoundException: Could not load file or assembly 'System.Buffers, Version=4.0.2.0

但是，我确实选择了Microsoft.AspNetCore.TestHost 2.2.0并自动下载了所有依赖项。因此，packages.json如下所示：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EntityFramework" version="6.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Hosting" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Hosting.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Hosting.Server.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Http" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Http.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Http.Extensions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.Http.Features" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.TestHost" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.AspNetCore.WebUtilities" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Configuration" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Configuration.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Configuration.Binder" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Configuration.EnvironmentVariables" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Configuration.FileExtensions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.DependencyInjection" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.DependencyInjection.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.FileProviders.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.FileProviders.Physical" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.FileSystemGlobbing" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Hosting.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Logging" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Logging.Abstractions" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.ObjectPool" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Options" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Extensions.Primitives" version="2.2.0" targetFramework="net472" />
  <package id="Microsoft.Net.Http.Headers" version="2.2.0" targetFramework="net472" />
  <package id="MSTest.TestAdapter" version="1.3.2" targetFramework="net472" />
  <package id="MSTest.TestFramework" version="1.3.2" targetFramework="net472" />
  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net472" />
  <package id="System.Buffers" version="4.5.0" targetFramework="net472" />
  <package id="System.Collections.Immutable" version="1.5.0" targetFramework="net472" />
  <package id="System.ComponentModel.Annotations" version="4.5.0" targetFramework="net472" />
  <package id="System.Data.SQLite" version="1.0.109.2" targetFramework="net472" />
  <package id="System.Data.SQLite.Core" version="1.0.109.2" targetFramework="net472" />
  <package id="System.Data.SQLite.EF6" version="1.0.109.0" targetFramework="net472" />
  <package id="System.Data.SQLite.Linq" version="1.0.109.0" targetFramework="net472" />
  <package id="System.Diagnostics.DiagnosticSource" version="4.5.0" targetFramework="net472" />
  <package id="System.IO.Pipelines" version="4.5.2" targetFramework="net472" />
  <package id="System.Memory" version="4.5.1" targetFramework="net472" />
  <package id="System.Numerics.Vectors" version="4.4.0" targetFramework="net472" />
  <package id="System.Reflection.Metadata" version="1.6.0" targetFramework="net472" />
  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.1" targetFramework="net472" />
  <package id="System.Text.Encodings.Web" version="4.5.0" targetFramework="net472" />
  <package id="System.Threading.Tasks.Extensions" version="4.5.1" targetFramework="net472" />
</packages>

测试班

[TestInitialize]
public void TestInitialize()
{
    server = new TestServer(new WebHostBuilder().UseStartup<Startup>());
    Client = server.CreateClient();
}

private HttpClient Client { get; set; }

[TestMethod]
public async Task GetDatabaseId()
{
    var response = await Client.GetAsync("api/values");
    ;
}

在调试测试时，Startup.cs中的app.UseMvc();行会抛出异常“ ... System.Buffers，...”（默认生成的类，变化为零）

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseHttpsRedirection();
    app.UseMvc();
}

Answer 1

System.Buffers是.NET Core的一部分，因此不会被您使用的特定NuGet软件包之一涵盖。换句话说，它被认为是框架的一部分。但是，.NET Framework 4.7不包含此命名空间。您需要显式添加System.Buffers NuGet程序包。

带有完整.NET Framework的单元测试AspNetCore

1 个答案: