unit testing a unit of work

Question

new to unit testing. I have a unit of work that I am trying to unit test. I am probably missing something simple here. I am trying to unit test the Commit method. I am using nunit and moq.

public class  UnitOfWork : IUnitOfWork
{
    private readonly DbContext _context;
    public UnitOfWork(DbContext ctx)
    {
        _context = ctx;
    }

    public void Commit()
    {
        _context.SaveChanges();
    }
}

What do I need to do to test this?

Answer 1

You would insert a mock of the DBContext and then verify that the SaveChanges method is called on commit.

[Test]
public void Will_call_save_changes() {

  var mockContext = new Mock<DBContext>();
  var unitOfWork = new UnitOfWork(mockContext.Object);

  unitOfWork.Commit();


  mockContext.Verify(x => x.SaveChanges());

}

Answer 2

You'll need to mock the DbContext, and then verify that SaveChanges was called. Something like Moq can help you here.