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"); }