spec/ruby/core/matchdata/named_captures_spec.rb


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require File.expand_path('../../../spec_helper', __FILE__)

ruby_version_is '2.4' do
  describe 'MatchData#named_captures' do
    it 'returns a Hash that has captured name and the matched string pairs' do
      /(?<a>.)(?<b>.)?/.match('0').named_captures.should == { 'a' => '0', 'b' => nil }
    end

    it 'prefers later captures' do
      /\A(?<a>.)(?<b>.)(?<b>.)(?<a>.)\z/.match('0123').named_captures.should == { 'a' => '3', 'b' => '2' }
    end
  end
end