public void Add_DistributionCenter_To_Db()
{
var mockDbSet = new Mock <DbSet <DistributionCenter> >();
var mockContext = new Mock <RentalContext>();
mockContext.Setup(d => d.DistributionCenters).Returns(mockDbSet.Object);
var svc = new DistributionService(mockContext.Object);
svc.Add(new DistributionCenter());
mockContext.Verify(a => a.Add(It.IsAny <DistributionCenter>()), Times.Once);
mockContext.Verify(s => s.SaveChanges(), Times.Once);
}
