File: to_ary_spec.rb

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require 'spec_helper'

describe Immutable::List do
  let(:list) { L['A', 'B', 'C', 'D'] }

  describe '#to_ary' do
    context 'on a really big list' do
      it "doesn't run out of stack" do
        -> { BigList.to_ary }.should_not raise_error
      end
    end

    context 'enables implicit conversion to' do
      it 'block parameters' do
        def func(&block)
          yield(list)
        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(*list)
      end

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