Testing Entity framework using Moq and extension method

Moq extension to transform a list to Moq of DBSet for testing the Entity Framework DbSet.

public static class Extensions
{
    public static Mock<DbSet<T>> GetMockSet<T>(this IQueryable<T> data) where T : class
    {
        var mockSet = new Mock<DbSet<T>>();
        mockSet.As<IQueryable<T>>().Setup(m => m.Provider).Returns(data.Provider);
        mockSet.As<IQueryable<T>>().Setup(m => m.Expression).Returns(data.Expression);
        mockSet.As<IQueryable<T>>().Setup(m => m.ElementType).Returns(data.ElementType);
        mockSet.As<IQueryable<T>>().Setup(m => m.GetEnumerator()).Returns<T>(x => data.GetEnumerator());
 
        return mockSet;
    }
}

To use it in the test as following:

[TestMethod]
public void GetCustomer_Mocked_With_Extension()
{
    var mockedContext = new Mock<IDbContext>();
 
    var data = new List<Customer>
    {
        new Customer { FirstName = "Rahman", LastName = "Mahmoodi", Id = 1 }
    }.AsQueryable();
 
    var mockSet = data.GetMockSet<Customer>(); // This is how to use it
 
    mockedContext.Setup(x => x.Customers).Returns(mockSet.Object);
 
    var cbo = new CustomerBusinessObject(mockedContext.Object);
    var c = cbo.Get(1);
    Assert.IsTrue(c.FirstName == "Rahman");
 
}