public void TestLibraryBookUsing()
{
LibraryBook newBook = new LibraryBook(BookType.Comedy, 23);
int res1 = newBook.GetFromStack();
bool res2 = newBook.isInStack();
int res3 = newBook.PutToStack();
bool res4 = newBook.isInStack();
Assert.AreEqual(0, res1);
Assert.AreEqual(false, res2);
Assert.AreEqual(1, res3);
Assert.AreEqual(true, res4);
}