entity-framework-mock

KO | EN

gitlite — search

#typescript #ai-agents #ai #dsh-plugin #deepseek-harness #open-source #claude-code #codex #cli #developer-tools #react #windows

entity-framework-mock

★ 49 Open GitHub ↗

Easy Mock wrapper for mocking EF6 DbContext and DbSet using Moq or NSubstitute

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

# EntityFrameworkMock

[![Build status](https://ci.appveyor.com/api/projects/status/5ung41elf64ahshg/branch/master?svg=true)](https://ci.appveyor.com/project/huysentruitw/entity-framework-mock/branch/master)

Easy Mock wrapper for mocking EF6 DbContext and DbSet in your unit-tests. Integrates with Moq or NSubstitute.

For mocking Entity Framework Core (EF Core) see <https://github.com/huysentruitw/entity-framework-core-mock>

## Get it on NuGet

### Moq integration

```powershell
PM> Install-Package EntityFrameworkMock.Moq
```

### NSubstitute integration

```powershell
PM> Install-Package EntityFrameworkMock.NSubstitute
```

## Supports

* In-memory storage of test data
* Querying of in-memory test data (synchronous or asynchronous)
* Tracking of updates, inserts and deletes of in-memory test data
* Emulation of `SaveChanges` and `SaveChangesAsync` (only saves tracked changes to the mocked in-memory DbSet when one of these methods are called)
* Auto-increment identity columns, annotated by the `[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]` attribute
* Primary key on multiple columns, annotated by the `[Key, Column(Order = X)]` attributes
* Throwing a `DbUpdateException` when inserting 2 or more entities with the same primary key while calling `SaveChanges` / `SaveChangesAsync` (emulating EF behavior)
* Throwing a `DbUpdateConcurrencyException` when removing a model that no longer exists (emulating EF behavior)

For the Moq version, you can use all known [Moq](https://github.com/Moq/moq4/wiki/Quickstart) features, since both `DbSetMock` and `DbContextMock` inherit from `Mock<DbSet>` and `Mock<DbContext>` respectively.

## Example usage

```csharp
public class User
{
    [Key, Column(Order = 0)]
    public Guid Id { get; set; }

public string FullName { get; set; }
}

public class TestDbContext : DbContext
{
    public TestDbContext(string connectionString)
        : base(connectionString)
    {
    }

public virtual DbSet<User> Users { get; set; }
}

[TestFixture]
public class MyTests
{
    var initialEntities = new[]
        {
            new User { Id = Guid.NewGuid(), FullName = "Eric Cartoon" },
            new User { Id = Guid.NewGuid(), FullName = "Billy Jewel" },
        };

var dbContextMock = new DbContextMock<TestDbContext>("fake connectionstring");
    var usersDbSetMock = dbContextMock.CreateDbSetMock(x => x.Users, initialEntities);

// Pass dbContextMock.Object to the class/method you want to test

// Query dbContextMock.Object.Users to see if certain users were added or removed
    // or use Mock Verify functionality to verify if certain methods were called: usersDbSetMock.Verify(x => x.Add(...), Times.Once);
}
```

entity-framework-mock

Explore Similar Repositories

Was this content helpful?

Recent Feedback

Download README