public function testUniq()
{
$this->assertEquals([1, 2, 3, 4], P::uniq([1, 1, 2, 2, 3, 4, 3, 4, 1]));
$a = function () {
(yield 1);
(yield 2);
(yield 3);
(yield 4);
};
$this->assertEquals([1, 2, 3, 4], P::uniq($a()));
}