File: sum_spec.rb

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

describe Immutable::Set do
  describe '#sum' do
    [
      [[], 0],
      [[2], 2],
      [[1, 3, 5, 7, 11], 27],
    ].each do |values, expected|
      context "on #{values.inspect}" do
        let(:set) { S[*values] }

        it "returns #{expected.inspect}" do
          set.sum.should == expected
        end

        it "doesn't change the original Set" do
          set.should eql(S.new(values))
        end
      end
    end
  end
end