require 'spec_helper'

describe Immutable::Deque do
  let(:deque) { D['A', 'B', 'C', 'D'] }

  describe '#to_ary' do
    context 'enables implicit conversion to' do
      it 'block parameters' do
        def func(&block)
          yield(deque)
        end

        func do |a, b, *c|
          expect(a).to eq('A')
          expect(b).to eq('B')
          expect(c).to eq(%w[C D])
        end
      end

      it 'method arguments' do
        def func(a, b, *c)
          expect(a).to eq('A')
          expect(b).to eq('B')
          expect(c).to eq(%w[C D])
        end
        func(*deque)
      end

      it 'works with splat' do
        array = *deque
        expect(array).to eq(%w[A B C D])
      end
    end
  end
end