/** @test */
public function testMainFunctionality()
{
$count = 0;
$it = new CachingIterator(new MapIterator(new ArrayIterator(range(0, 10)), function ($i) use(&$count) {
$count += 1;
return $i;
}));
$it->rewind();
$this->assertEquals(0, $count);
$it->valid();
$this->assertEquals(0, $it->current());
$it->valid();
$it->next();
$this->assertEquals(1, $it->current());
$this->assertEquals(1, $it->current());
$this->assertEquals(1, $it->current());
$it->valid();
$it->next();
$this->assertEquals(2, $it->current());
$this->assertEquals(3, $count);
}
/**
* Rewinds the Iterator.
* @return void
*/
public function rewind()
{
parent::rewind();
$this->counter = parent::valid() ? 1 : 0;
}
<?php
$data = array('Mela', 'Pera', 'Kiwi', 'Banana', 'Pompelmo');
$it = new ArrayIterator($data);
$iterator = new CachingIterator($it);
for ($iterator->rewind(); $iterator->valid(); $iterator->next()) {
echo $iterator, PHP_EOL;
}
next(){parent::next();if(parent::valid()){$this->counter++;}}function
rewind(){parent::rewind();$this->counter=parent::valid()?1:0;}function
