public void TestBorrowerCanReturnBook()
{
borrower.ReturnBook(library, book2);
Assert.AreEqual(2, library.CountCollection());
}
public void TestCanRemoveFromBorrowedBooks()
{
borrower.BorrowBook(library, book);
borrower.ReturnBook(library, book);
Assert.AreEqual(0, borrower.CountBorrowedBooks());
}