DivertR 4.0.0

dotnet add package DivertR --version 4.0.0                
NuGet\Install-Package DivertR -Version 4.0.0                
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="DivertR" Version="4.0.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add DivertR --version 4.0.0                
#r "nuget: DivertR, 4.0.0"                
#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.
// Install DivertR as a Cake Addin
#addin nuget:?package=DivertR&version=4.0.0

// Install DivertR as a Cake Tool
#tool nuget:?package=DivertR&version=4.0.0                

DivertR

nuget build

DivertR is a .NET proxy framework that can be used to create test doubles. It is similar to existing mocking frameworks like Moq but provides additional features for integration testing of wired-up systems.

Installing

Install DivertR as a NuGet package:

Install-Package DivertR

Or via the .NET command line interface:

dotnet add package DivertR

Example Usage

DivertR works by decorating dependency injection services with proxies that behave the same as the originals but that can be manipulated and reset dynamically. This facilitate a style of testing where you start with the integrated, wired-up system and only mock out specific parts required per test.

For example, it can significantly speed up integration tests running against a WebApplicationFactory (TestServer) instance by altering and mocking dependencies between tests without requiring reinitialisation like this:

[Fact]
public async Task GivenBookExists_WhenGetBookById_ThenReturnsBook()
{
    // ARRANGE
    var mockedBook = new Book { Id = Guid.NewGuid(), Name = "Test Book" };
    
    // Configure IBookService to return a mocked result
    _diverter
        .Redirect<IBookService>() // Redirect IFooService calls 
        .To(x => x.GetBookAsync(mockedBook.Id)) // matching this method and argument value
        .Via(() => Task.FromResult(mockedBook)); // via this delegate
    
    // ACT
    var bookResult = await _httpClient.GetFromJsonAsync<Book>($"/books/{mockedBook.Id}");
    
    // ASSERT
    Assert.NotNull(bookResult);
    Assert.Equal(mockedBook.Id, bookResult.Id);
    Assert.Equal(mockedBook.Name, bookResult.Name);
}

[Fact]
public async Task GivenBookServiceError_WhenGetBookById_ThenReturns500InternalServerError()
{
    // ARRANGE
    var bookId = Guid.NewGuid();
    
    // Configure IBookService to throw an exception
    _diverter
        .Redirect<IBookService>()
        .To(x => x.GetBookAsync(bookId)) // match on bookId value only
        .Via(() => throw new Exception("Test"));
    
    // ACT
    var controlResponse = await _httpClient.GetAsync($"/books/{Guid.NewGuid()}");
    var testResponse = await _httpClient.GetAsync($"/books/{bookId}");
    
    
    // ASSERT
    Assert.Equal(HttpStatusCode.NotFound, controlResponse.StatusCode);
    Assert.Equal(HttpStatusCode.InternalServerError, testResponse.StatusCode);
}

Note
The source code for the example above is available here.

Follow the Resources section below for more examples, quickstart, documentation, etc.

Resources

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on DivertR:

Package Downloads
DivertR.DynamicProxy

A DivertR proxy factory implementation that supports proxying class types using Castle DynamicProxy

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
4.0.0 2,556 5/22/2023
3.1.0 83,999 1/27/2023
3.0.0 2,208 1/7/2023
2.2.0 601 11/26/2022
2.1.0 3,830 11/13/2022
2.0.1 5,492 8/16/2022
2.0.0 409 8/12/2022
1.3.1 483 5/19/2022
1.3.0 4,458 1/30/2022
1.2.0 3,192 12/7/2021
1.1.0 2,197 11/28/2021
1.0.0 3,179 11/25/2021
0.1.0 1,334 10/6/2021