public function test_key_by_attribute()
{
$data = new Collection(array(array('rating' => 1, 'name' => '1'), array('rating' => 2, 'name' => '2'), array('rating' => 3, 'name' => '3')));
$actual = $data->keyBy('rating');
$expected = array(1 => array('rating' => 1, 'name' => '1'), 2 => array('rating' => 2, 'name' => '2'), 3 => array('rating' => 3, 'name' => '3'));
$this->assertEquals($expected, $actual->all());
$actual = $data->keyBy(function ($item) {
return $item['rating'] * 2;
});
$expected = array(2 => array('rating' => 1, 'name' => '1'), 4 => array('rating' => 2, 'name' => '2'), 6 => array('rating' => 3, 'name' => '3'));
$this->assertEquals($expected, $actual->all());
}
