DusanKasan / Knapsack

            ->shouldReturn([0, 1, 2, 3]);

    }

    function it_can_interpose()

    {

        $this->beConstructedWith([1, 3, 3, 2,]);

        $this

            ->interpose('a')

            ->values()

            ->toArray()

            ->shouldReturn([1, 'a', 3, 'a', 3, 'a', 2]);

    }

    function it_can_drop_elements_from_end_of_the_collection()

    {

            ->shouldReturn([1, 'a', 3, 'b', 3, 'c', 2, 'd', 'e']);

    }

    function it_can_repeat_items_of_collection_infinitely()

    {

        $this->beConstructedWith([1, 3, 3, 2,]);

        $this

            ->cycle()

            ->take(8)

            ->values()

            ->toArray()

            ->shouldReturn([1, 3, 3, 2, 1, 3, 3, 2]);

    }

    function it_can_prepend_item()

    {