require 'spec_helper'

describe Immutable::Set do
  describe '#join' do
    context 'with a separator' do
      [
        [[], ''],
        [['A'], 'A'],
        [[DeterministicHash.new('A', 1), DeterministicHash.new('B', 2), DeterministicHash.new('C', 3)], 'A|B|C']
      ].each do |values, expected|
        context "on #{values.inspect}" do
          let(:set) { S[*values] }

          it 'preserves the original' do
            set.join('|')
            set.should eql(S[*values])
          end

          it "returns #{expected.inspect}" do
            set.join('|').should eql(expected)
          end
        end
      end
    end

    context 'without a separator' do
      [
        [[], ''],
        [['A'], 'A'],
        [[DeterministicHash.new('A', 1), DeterministicHash.new('B', 2), DeterministicHash.new('C', 3)], 'ABC']
      ].each do |values, expected|
        context "on #{values.inspect}" do
          let(:set) { S[*values] }

          it 'preserves the original' do
            set.join
            set.should eql(S[*values])
          end

          it "returns #{expected.inspect}" do
            set.join.should eql(expected)
          end
        end
      end
    end

    context 'without a separator (with global default separator set)' do
      before { $, = '**' }
      let(:set) { S[DeterministicHash.new('A', 1), DeterministicHash.new('B', 2), DeterministicHash.new('C', 3)] }
      after  { $, = nil }

      context "on ['A', 'B', 'C']" do
        it 'preserves the original' do
          set.join
          set.should eql(S[DeterministicHash.new('A', 1), DeterministicHash.new('B', 2), DeterministicHash.new('C', 3)])
        end

        it "returns #{@expected.inspect}" do
          set.join.should == 'A**B**C'
        end
      end
    end
  end
end