public void Delete_ValidGroup_ShouldRemoveGroupViaContext()
{
supplierGroupDal.Delete(supplierGroupId);
groups.Verify(s => s.Remove(It.IsAny <SqlSupplierGroup>()), Times.Once);
context.Verify(c => c.SaveChanges(), Times.Once);
}
public void DeleteSupplierGroup(int id)
{
supplierGroupDal.Delete(id);
}