public function testChunk()
{
/**
* @var Collection[] $chunks
*/
$chunks = $this->collection->chunk(2);
$this->assertCount(2, $chunks);
$this->assertEquals($this->_0, $chunks[0]->get(0));
$this->assertEquals($this->_1, $chunks[0]->get(1));
$this->assertEquals($this->_2, $chunks[1]->get(0));
$this->assertEquals($this->_3, $chunks[1]->get(1));
}