public function testUseAIteratorAndValidateAuthors($expected)
{
$iterator = new BookListIterator($this->bookList);
while ($iterator->valid()) {
$expectedBook = array_shift($expected);
$this->assertEquals($expectedBook, $iterator->current()->getAuthorAndTitle());
$iterator->next();
}
}
<?php
require 'Book.php';
require 'BookList.php';
require 'BookListIterator.php';
$firstBook = new Book('Core PHP Programming, Third Edition', 'Atkinson and Suraski');
$secondBook = new Book('PHP Bible', 'Converse and Park');
$thirdBook = new Book('Design Patterns', 'Gamma, Helm, Johnson, and Vlissides');
$books = new BookList();
$books->addBook($firstBook);
$books->addBook($secondBook);
$books->addBook($thirdBook);
$booksIterator = new BookListIterator($books);
while ($booksIterator->hasNextBook()) {
$book = $booksIterator->getNextBook();
echo $book->getAuthorAndTitle();
}
