public void should_caculate_ZT_postage_for_book_More_Than_5KG()
{
var book = new Book(7);
var postage = new PostageCalculator().GetPostage(new List<IPostable> { book }, m_Zt);
Assert.AreEqual(18, postage);
}
public void should_caculate_SF_postage_for_book()
{
var book = new Book(3);
var postage = new PostageCalculator().GetPostage(new List<IPostable> { book }, m_Sf);
Assert.AreEqual(9, postage);
}