MockQueryable.NSubstitute
9.0.0
dotnet add package MockQueryable.NSubstitute --version 9.0.0
NuGet\Install-Package MockQueryable.NSubstitute -Version 9.0.0
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="MockQueryable.NSubstitute" Version="9.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
<PackageVersion Include="MockQueryable.NSubstitute" Version="9.0.0" />
<PackageReference Include="MockQueryable.NSubstitute" />
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 9.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: MockQueryable.NSubstitute, 9.0.0"
#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.
#:package MockQueryable.NSubstitute@9.0.0
#: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=9.0.0
#tool nuget:?package=MockQueryable.NSubstitute&version=9.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
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
| Package | Downloads | Latest Version | Install via Package Manager |
|---|---|---|---|
| MockQueryable.Core |  |
 |
Install-Package MockQueryable.Core |
| MockQueryable.EntityFrameworkCore |  |
 |
Install-Package MockQueryable.EntityFrameworkCore |
| MockQueryable.Moq |  |
 |
Install-Package MockQueryable.Moq |
| MockQueryable.NSubstitute |  |
 |
Install-Package MockQueryable.NSubstitute |
| MockQueryable.FakeItEasy |  |
 |
Install-Package MockQueryable.FakeItEasy |
✅ Build & Status
⭐ GitHub Stats
💡 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.
🚀 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 | Versions Compatible and additional computed target framework versions. |
|---|---|
| .NET | net9.0 is compatible. net9.0-android was computed. net9.0-browser was computed. net9.0-ios was computed. net9.0-maccatalyst was computed. net9.0-macos was computed. net9.0-tvos was computed. net9.0-windows was computed. net10.0 was computed. 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.
-
net9.0
- MockQueryable.EntityFrameworkCore (>= 9.0.0)
- NSubstitute (>= 5.3.0)
NuGet packages
This package is not used by any NuGet packages.
GitHub repositories (2)
Showing the top 2 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.
|
|
|
alex289/CleanArchitecture
Sample .NET 9 API project including Clean Architecture principles, Onion Architecture, MediatR, and Entity Framework with unit and integration tests using xUnit
|
| Version | Downloads | Last Updated |
|---|---|---|
| 9.0.0 | 11,020 | 10/6/2025 |
| 8.0.1 | 3,464 | 10/6/2025 |
| 8.0.0 | 79,631 | 7/27/2025 |
| 7.0.4-beta | 38,832 | 9/24/2024 |
| 7.0.3 | 1,128,606 | 9/2/2024 |
| 7.0.2 | 61,158 | 8/20/2024 |
| 7.0.1 | 729,038 | 3/7/2024 |
| 7.0.0 | 896,210 | 11/21/2022 |
| 6.0.1 | 695,869 | 3/28/2022 |
| 6.0.0 | 130,392 | 3/24/2022 |
| 5.0.2 | 64,885 | 3/24/2022 |
| 5.0.1 | 468,137 | 5/25/2021 |
| 5.0.0 | 142,856 | 11/12/2020 |
| 5.0.0-preview.7 | 670 | 7/28/2020 |
| 3.1.3 | 161,016 | 5/19/2020 |
| 3.1.2 | 19,731 | 4/17/2020 |
| 3.1.1 | 33,111 | 1/25/2020 |
| 3.0.2 | 5,557 | 12/20/2019 |
| 3.0.1 | 29,831 | 10/11/2019 |
| 3.0.1-alpha | 649 | 10/6/2019 |
| 3.0.0 | 1,171 | 9/30/2019 |
| 1.1.0 | 115,648 | 2/28/2019 |
| 1.0.4 | 19,671 | 1/29/2019 |
| 1.0.3 | 14,328 | 8/30/2018 |
| 1.0.2 | 6,383 | 7/6/2018 |
Upgrade to .Net 9 and EntityFrameworkCore 9