class Buku dan Pengguna

from book import Book

# 1. Buat object Book
book = Book("1984", "George Orwell", "345678")

# 2. Periksa atribut
print(book.title)       # Seharusnya mencetak: 1984
print(book.author)      # Seharusnya mencetak: George Orwell
print(book.isbn)        # Seharusnya mencetak: 345678
print(book.available)   # Seharusnya mencetak: True
print(book.borrower)    # Seharusnya mencetak: None

# 3. Uji __str__ saat tersedia
print(book)  # Seharusnya mencetak: 1984 by George Orwell (ISBN: 345678) - Available

# 4. Uji __str__ saat tidak tersedia
book.available = False
print(book)  # Seharusnya mencetak: 1984 by George Orwell (ISBN: 345678) - Not Available