<?php

/**
 * This file is part of the Propel package.
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license    MIT License
 */

require_once 'tools/helpers/bookstore/BookstoreEmptyTestBase.php';

/**
 * Test the utility class PropelPager
 *
 * @author		 Francois Zaninotto
 * @version		 $Id: PropelModelPagerTest.php
 * @package		 runtime.util
 */
class PropelModelPagerTest extends BookstoreEmptyTestBase
{
	private $authorId;
	private $books;
	
	protected function createBooks($nb = 15, $con = null)
	{
		BookQuery::create()->deleteAll($con);
		$books = new PropelObjectCollection();
		$books->setModel('Book');
		for ($i=0; $i < $nb; $i++) { 
			$b = new Book();
			$b->setTitle('Book' . $i);
			$books[]= $b;
		}
		$books->save($con);
	}
	
	protected function getPager($maxPerPage, $page = 1)
	{
		$pager = new PropelModelPager(BookQuery::create(), $maxPerPage);
		$pager->setPage($page);
		$pager->init();
		return $pager;
	}
	
	public function testHaveToPaginate()
	{
		BookQuery::create()->deleteAll();
		$this->assertEquals(false, $this->getPager(0)->haveToPaginate(), 'haveToPaginate() returns false when there is no result');
		$this->createBooks(5);
		$this->assertEquals(false, $this->getPager(0)->haveToPaginate(), 'haveToPaginate() returns false when the maxPerPage is null');
		$this->assertEquals(true, $this->getPager(2)->haveToPaginate(), 'haveToPaginate() returns true when the maxPerPage is less than the number of results');
		$this->assertEquals(false, $this->getPager(6)->haveToPaginate(), 'haveToPaginate() returns false when the maxPerPage is greater than the number of results');
		$this->assertEquals(false, $this->getPager(5)->haveToPaginate(), 'haveToPaginate() returns false when the maxPerPage is equal to the number of results');
	}

	public function testGetNbResults()
	{
		BookQuery::create()->deleteAll();
		$pager = $this->getPager(4, 1);
		$this->assertEquals(0, $pager->getNbResults(), 'getNbResults() returns 0 when there are no results');
		$this->createBooks(5);
		$pager = $this->getPager(4, 1);
		$this->assertEquals(5, $pager->getNbResults(), 'getNbResults() returns the total number of results');
		$pager = $this->getPager(2, 1);
		$this->assertEquals(5, $pager->getNbResults(), 'getNbResults() returns the total number of results');
		$pager = $this->getPager(2, 2);
		$this->assertEquals(5, $pager->getNbResults(), 'getNbResults() returns the total number of results');
		$pager = $this->getPager(7, 6);
		$this->assertEquals(5, $pager->getNbResults(), 'getNbResults() returns the total number of results');
		$pager = $this->getPager(0, 0);
		$this->assertEquals(5, $pager->getNbResults(), 'getNbResults() returns the total number of results');
	}
	
	public function testGetResults()
	{
		$this->createBooks(5);
		$pager = $this->getPager(4, 1);
		$this->assertTrue($pager->getResults() instanceof PropelObjectCollection, 'getResults() returns a PropelObjectCollection');
		$this->assertEquals(4, count($pager->getResults()), 'getResults() returns at most $maxPerPage results');
		$pager = $this->getPager(4, 2);
		$this->assertEquals(1, count($pager->getResults()), 'getResults() returns the remaining results when in the last page');
		$pager = $this->getPager(4, 3);
		$this->assertEquals(1, count($pager->getResults()), 'getResults() returns the results of the last page when called on nonexistent pages');
	}

	public function testGetIterator()
	{
		$this->createBooks(5);

		$pager = $this->getPager(4, 1);
		$i = 0;
		foreach ($pager as $book) {
			$this->assertEquals('Book' . $i, $book->getTitle(), 'getIterator() returns an iterator');
			$i++;
		}
		$this->assertEquals(4, $i, 'getIterator() uses the results collection');
	}

	public function testIterateTwice()
	{
		$this->createBooks(5);
		$pager = $this->getPager(4, 1);
		
		$i = 0;
		foreach ($pager as $book) {
			$this->assertEquals('Book' . $i, $book->getTitle(), 'getIterator() returns an iterator');
			$i++;
		}
		$this->assertEquals(4, $i, 'getIterator() uses the results collection');
		
		$i = 0;
		foreach ($pager as $book) {
			$this->assertEquals('Book' . $i, $book->getTitle());
			$i++;
		}
		$this->assertEquals(4, $i, 'getIterator() can be called several times');
	}
	
	public function testSetPage()
	{
		$this->createBooks(5);
		$pager = $this->getPager(2, 2);
		$i = 2;
		foreach ($pager as $book) {
			$this->assertEquals('Book' . $i, $book->getTitle(), 'setPage() sets the list to start on a given page');
			$i++;
		}
		$this->assertEquals(4, $i, 'setPage() doesn\'t change the page count');
	}
	
	public function testIsFirstPage()
	{
		$this->createBooks(5);
		$pager = $this->getPager(4, 1);
		$this->assertTrue($pager->isFirstPage(), 'isFirstPage() returns true on the first page');
		$pager = $this->getPager(4, 2);
		$this->assertFalse($pager->isFirstPage(), 'isFirstPage() returns false when not on the first page');
	}

	public function testIsLastPage()
	{
		$this->createBooks(5);
		$pager = $this->getPager(4, 1);
		$this->assertFalse($pager->isLastPage(), 'isLastPage() returns false when not on the last page');
		$pager = $this->getPager(4, 2);
		$this->assertTrue($pager->isLastPage(), 'isLastPage() returns true on the last page');
	}
}