public function testMultiSortArrayItems()
{
$this->assertCount(0, ObjectUtils::multiSort($this->_provideCollection(0, '_provideArray'), 'id'));
$collection = $this->_provideCollection(125, '_provideArray');
$collectionNamed = ObjectUtils::keyExplode($collection, 'name');
$this->assertCount(count($collection), ObjectUtils::multiSort($collection, 'id'));
$this->assertTrue(ArrayUtils::isCollection(ObjectUtils::multiSort($collectionNamed, 'id')));
// make sure the same order
$this->assertEquals($collection->toArray(), ObjectUtils::multiSort($collection, 'id'));
// make sure proper order
$collection = $this->_provideCollection(5, '_provideArray');
$sortedCollection = ObjectUtils::multiSort($collection, 'categoryId');
$this->assertEquals(array(5, 1, 2, 3, 4), ObjectUtils::keyFilter($sortedCollection, 'id'));
$sortedCollection = ObjectUtils::multiSort($collection, 'categoryId', true);
$this->assertEquals(array(4, 3, 2, 1, 5), ObjectUtils::keyFilter($sortedCollection, 'id'));
$sortedCollection = ObjectUtils::multiSort($collection, 'date');
$this->assertEquals(array(1, 2, 3, 4, 5), ObjectUtils::keyFilter($sortedCollection, 'id'));
$sortedCollection = ObjectUtils::multiSort($collection, 'date', true);
$this->assertEquals(array(5, 4, 3, 2, 1), ObjectUtils::keyFilter($sortedCollection, 'id'));
}
