DusanKasan / Knapsack

            ->shouldReturn(true);

    }

    function it_can_check_if_it_contains_a_value()

    {

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

        $this

            ->contains(3)

            ->shouldReturn(true);

        $this

            ->contains(true)

            ->shouldReturn(false);

    }

    function it_can_reverse()

    {

        $this->intersect([1], [3])->values()->toArray()->shouldReturn([1, 3]);

    }

    function it_can_check_if_size_is_exactly_n()

    {

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

        $this->sizeIs(2)->shouldReturn(true);

        $this->sizeIs(3)->shouldReturn(false);

        $this->sizeIs(0)->shouldReturn(false);

    }

    function it_can_check_if_size_is_less_than_n()

    {

        $this->sizeIs(0)->shouldReturn(false);

    }

    function it_can_check_if_size_is_less_than_n()

    {

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

        $this->sizeIsLessThan(0)->shouldReturn(false);

        $this->sizeIsLessThan(2)->shouldReturn(false);

        $this->sizeIsLessThan(3)->shouldReturn(true);

    }

    function it_can_check_if_size_is_greater_than_n()

    {

        $this->sizeIsLessThan(3)->shouldReturn(true);

    }

    function it_can_check_if_size_is_greater_than_n()

    {

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

        $this->sizeIsGreaterThan(2)->shouldReturn(false);

        $this->sizeIsGreaterThan(1)->shouldReturn(true);

        $this->sizeIsGreaterThan(0)->shouldReturn(true);

    }

    function it_can_check_if_size_is_between_n_and_m()

    {