public void Get_Current_Holds()
{
var holds = GetCurrentHolds().AsQueryable();
var mockDbSet = new Mock <DbSet <Hold> >();
mockDbSet.As <IQueryable <Hold> >().Setup(p => p.Provider).Returns(holds.Provider);
mockDbSet.As <IQueryable <Hold> >().Setup(p => p.Expression).Returns(holds.Expression);
mockDbSet.As <IQueryable <Hold> >().Setup(p => p.ElementType).Returns(holds.ElementType);
mockDbSet.As <IQueryable <Hold> >().Setup(p => p.GetEnumerator()).Returns(holds.GetEnumerator);
var mockContext = new Mock <RentalContext>();
mockContext.Setup(r => r.Holds).Returns(mockDbSet.Object);
var service = new RentalService(mockContext.Object);
var hold = service.GetCurrentHolds(1);
hold.Should().HaveCount(2);
hold.Should().Contain(h => h.Subscriber.FirstName == "Mary");
hold.Should().Contain(h => h.Subscriber.FirstName == "Brad");
}