public function testLast()
{
$this->assertEquals(9, last([1, 2, 3, 4, 5, 6, 7, 8, 9]));
$this->assertEquals(9, last(new \ArrayIterator([1, 2, 3, 4, 5, 6, 7, 8, 9])));
$this->assertEquals(9, call_user_func(last, [1, 2, 3, 4, 5, 6, 7, 8, 9]));
$this->assertEquals('\\nspl\\a\\last', last);
}