Microsoft.AspNetCore.TestHost 10.0.3

Prefix Reserved
.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package Microsoft.AspNetCore.TestHost --version 10.0.3
                    


                    

                
NuGet\Install-Package Microsoft.AspNetCore.TestHost -Version 10.0.3
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Microsoft.AspNetCore.TestHost" Version="10.0.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="10.0.3" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Microsoft.AspNetCore.TestHost" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Microsoft.AspNetCore.TestHost --version 10.0.3
                    


                    

                
#r "nuget: Microsoft.AspNetCore.TestHost, 10.0.3"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Microsoft.AspNetCore.TestHost@10.0.3
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Microsoft.AspNetCore.TestHost&version=10.0.3
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Microsoft.AspNetCore.TestHost&version=10.0.3
                    


                            Install as a Cake Tool

About

Microsoft.AspNetCore.TestHost provides an ASP.NET Core web server for testing middleware in isolation.

Key Features

  • Instantiate an app pipeline containing only the components that you need to test
  • Send custom requests to verify middleware behavior

How to Use

To use Microsoft.AspNetCore.TestHost, follow these steps:

Installation

dotnet add package Microsoft.AspNetCore.TestHost

Usage

To set up the TestServer, configure it in your test project. Here's an example:

[Fact]
public async Task MiddlewareTest_ReturnsNotFoundForRequest()
{
    // Build and start a host that uses TestServer
    using var host = await new HostBuilder()
        .ConfigureWebHost(builder =>
        {
            builder.UseTestServer()
                .ConfigureServices(services =>
                {
                    // Add any required services that the middleware uses
                    services.AddMyServices();
                })
                .Configure(app =>
                {
                    // Configure the processing pipeline to use the middleware
                    // for the test
                    app.UseMiddleware<MyMiddleware>();
                });
        })
        .StartAsync();

    var response = await host.GetTestClient().GetAsync("/");

    Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
}

Main Types

The main types provided by this package are:

  • TestServer: An IServer implementation for executing tests
  • TestServerOptions: Provides options for configuring a TestServer

Additional Documentation

For additional documentation and examples, refer to the official documentation for testing middleware in ASP.NET Core.

Feedback & Contributing

Microsoft.AspNetCore.TestHost is released as open-source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net10.0

    • No dependencies.

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Version Downloads Last Updated
11.0.0-preview.1.26104.118 526 2/10/2026
10.0.3 125,287 2/10/2026
10.0.2 1,464,167 1/13/2026
10.0.1 1,519,191 12/9/2025
10.0.0 2,163,257 11/11/2025
10.0.0-rc.2.25502.107 100,545 10/14/2025
10.0.0-rc.1.25451.107 77,315 9/9/2025
10.0.0-preview.7.25380.108 35,936 8/12/2025
9.0.13 17,728 2/10/2026
9.0.12 227,589 1/13/2026
9.0.11 1,341,510 11/11/2025
9.0.10 2,423,008 10/14/2025
9.0.9 2,575,326 9/9/2025
8.0.24 31,924 2/10/2026
8.0.23 373,308 1/13/2026
8.0.22 1,932,662 11/11/2025
8.0.21 1,723,016 10/14/2025
8.0.20 1,750,310 9/9/2025
2.3.9 10,832 1/7/2026
2.3.8 16,580 1/7/2026
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