public function testSplit()
{
$collection = new Collection([$e1 = new Entity(['id' => 1]), $e2 = new Entity(['id' => 2]), $e3 = new Entity(['id' => 3]), $e4 = new Entity(['id' => 4]), $e5 = new Entity(['id' => 5])]);
$splitted = $collection->split(2);
$this->assertEquals([$e1, $e2, $e3], [$splitted[0][0], $splitted[0][1], $splitted[0][2]]);
$this->assertEquals([$e4, $e5], [$splitted[1][0], $splitted[1][1]]);
}
