Pinq\Tests\Integration\Traversable\GroupJoinTest::testThatGroupJoinMaintainsGroupedDataReferences PHP Метод

    public function testThatGroupJoinMaintainsGroupedDataReferences(\Pinq\ITraversable $traversable)
    {
        $joinData = $this->makeRefs(range(1, 100));
        $traversable->append(range(1, 100, 10))->groupJoin($joinData)->on(function ($o, $i) {
            return (int) ($o / 10) === (int) ($i / 10);
        })->to(function ($o, \Pinq\ITraversable $group) {
            return $group;
        })[3]->iterate(function (&$i) {
            $i *= 10;
        });
        $this->assertSame(array_merge(range(1, 29), range(300, 390, 10), range(40, 100)), $joinData);
    }