def testAddBookToIndex(self):
'''
Function that checks whether a book is correctly inserted in a list or nah
input:-
preconditions:-
output:-
postconditions: If the book isn't correctly inserted, an error will appear
'''
myListOfBooks = [Book(1, "a", "b", "c"), Book(3, "g", "h", "i")]
myBook = Book(2, "d", "e", "f")
index = [1]
myBook._Book__addBookToIndex(index, myListOfBooks)
self.assertEqual(myListOfBooks[1]._Book__Id, 2)
self.assertEqual(myListOfBooks[1]._Book__title, "d")
self.assertEqual(myListOfBooks[1]._Book__description, "e")
self.assertEqual(myListOfBooks[1]._Book__author, "f")
