MockQueryable.NSubstitute 10.0.13

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package MockQueryable.NSubstitute --version 10.0.13
                    


                    

                
NuGet\Install-Package MockQueryable.NSubstitute -Version 10.0.13
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="MockQueryable.NSubstitute" Version="10.0.13" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="MockQueryable.NSubstitute" Version="10.0.13" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="MockQueryable.NSubstitute" />
                    


                            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 MockQueryable.NSubstitute --version 10.0.13
                    


                    

                
#r "nuget: MockQueryable.NSubstitute, 10.0.13"
#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 MockQueryable.NSubstitute@10.0.13
#: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=MockQueryable.NSubstitute&version=10.0.13
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=MockQueryable.NSubstitute&version=10.0.13
                    


                            Install as a Cake Tool

MockQueryable

Extensions for mocking Entity Framework Core async queries like ToListAsync, FirstOrDefaultAsync, and more using popular mocking libraries such as Moq, NSubstitute, and FakeItEasy — all without hitting the database.

❤️ If you really like the tool, please 👉 Support the project or ☕ Buy me a coffee.

📦 NuGet Packages: Total Downloads

Package Latest Version Install via Package Manager
Download Version Install-Package MockQueryable.Core
Download Version Install-Package MockQueryable.EntityFrameworkCore
Download Version Install-Package MockQueryable.Moq
Download Version Install-Package MockQueryable.NSubstitute
Download Version Install-Package MockQueryable.FakeItEasy

✅ Build & Status

codecov build License

⭐ GitHub Stats

Stars Contributors Last Commit Commit Activity Open Issues

💡 Why Use MockQueryable?

Avoid hitting the real database in unit tests when querying via IQueryable:

var query = _userRepository.GetQueryable();

await query.AnyAsync(x => ...);
await query.FirstOrDefaultAsync(x => ...);
await query.ToListAsync();
// etc.

How It Works

MockQueryable creates a custom implementation of:

  • IQueryable<T>
  • IAsyncEnumerable<T>
  • IAsyncQueryProvider

allowing EF Core async extensions to execute against in-memory collections.

👷🏻‍See Architecture.

🚀 Getting Started

1. Create Test Data

var users = new List<UserEntity>
{
    new UserEntity { LastName = "Smith", DateOfBirth = new DateTime(2012, 1, 20) },
    // More test data...
};

2. Build the Mock

var mock = users.BuildMock(); // for IQueryable

3. Set Up in Your favorite Mocking Framework

Moq
_userRepository.Setup(x => x.GetQueryable()).Returns(mock);
NSubstitute
_userRepository.GetQueryable().Returns(mock);
FakeItEasy
A.CallTo(() => userRepository.GetQueryable()).Returns(mock);

🗃️ Mocking DbSet<T>

var mockDbSet = users.BuildMockDbSet();

// Moq
var repo = new TestDbSetRepository(mockDbSet.Object);

// NSubstitute / FakeItEasy
var repo = new TestDbSetRepository(mockDbSet);

🔧 Adding Custom Logic

Example: Custom FindAsync

mock.Setup(x => x.FindAsync(userId)).ReturnsAsync((object[] ids) =>
{
    var id = (Guid)ids[0];
    return users.FirstOrDefault(x => x.Id == id);
});

Example: Custom Expression Visitor

Build a mock with the custom SampleLikeExpressionVisitor for testing EF.Functions.Like

var mockDbSet = users.BuildMockDbSet<UserEntity, SampleLikeExpressionVisitor>();

🧩 Extend for Other Frameworks

You can even create your own extensions. Check the example here.

🔍 Sample Project

See the sample project for working examples.

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.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories (4)

Showing the top 4 popular GitHub repositories that depend on MockQueryable.NSubstitute:

Repository Stars
nuyonu/N-Tier-Architecture
This is a n-layer architecture based on Common web application architectures.
kaybi-gh/K7
Self-hosted media server for a small circle of family and friends.
alex289/CleanArchitecture
Sample .NET 10 API project including Clean Architecture principles, Onion Architecture, MediatR, and Entity Framework with unit and integration tests using xUnit
suxrobGM/logistics-app
AI-powered fleet management platform with an agentic dispatcher that matches loads to trucks, ensures HOS compliance, and optimizes routes. Built for trucking companies.
Version Downloads Last Updated
10.0.13 614 10/19/2026
10.0.12 79,015 9/13/2026
10.0.8 366,295 5/16/2026
10.0.5 387,290 3/15/2026
10.0.2 207,910 1/29/2026
10.0.1 140,110 11/22/2025
10.0.0 6,150 11/22/2025
9.0.0 187,820 10/6/2025
8.0.1 141,719 10/6/2025
8.0.0 314,054 7/27/2025
7.0.4-beta 64,793 9/24/2024
7.0.3 2,263,744 9/2/2024
7.0.2 73,918 8/20/2024
7.0.1 1,046,621 3/7/2024
7.0.0 1,162,270 11/21/2022
6.0.1 975,273 3/28/2022
6.0.0 139,080 3/24/2022
5.0.2 92,729 3/24/2022
5.0.1 498,639 5/25/2021
5.0.0 171,429 11/12/2020
Loading failed

Bump Microsoft.NET.Test.Sdk from 18.10.0 to 18.10.1  in #159
 Bump coverlet.msbuild from 10.0.1 to 10.1.0  in #161
 Bump NUnit3TestAdapter from 6.3.0 to 6.3.1 in #163
 Bump Microsoft.NET.Test.Sdk from 18.10.1 to 18.11.0  in #165
 Bump Moq from 4.20.72 to 4.21.0  in #160
 Bump Microsoft.EntityFrameworkCore from 10.0.12 to 10.0.13 in #164