public void GetItems()
        {
            IReferenceDataSource source;

            source = new ApiReferenceDataSrouce();
            Assert.Equal(2, source.GetItems().Count());

            source = new SqlReferenceDataSource();
            Assert.Equal(2, source.GetItems().Count());

            source = new XmlReferenceDataSource();
            Assert.Equal(2, source.GetItems().Count());
        }
        public void GetItemsByCode_Api()
        {
            var source = new ApiReferenceDataSrouce();

            Assert.Equal(2, source.GetItemsByCode("xyz").Count());
        }