File: pop_spec.rb

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ruby-immutable-ruby 0.1.0-2
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require 'spec_helper'

describe Immutable::List do
  let(:list) { L[*values] }

  describe '#pop' do
    let(:pop) { list.pop }

    context 'with an empty list' do
      let(:values) { [] }

      it 'returns an empty list' do
        expect(pop).to eq(L.empty)
      end
    end

    context 'with a list with a few items' do
      let(:values) { %w[a b c] }

      it 'removes the last item' do
        expect(pop).to eq(L['a', 'b'])
      end
    end
  end
end