local variables in eval

gistfile1.rb

require 'rubygems'
require 'rspec'

describe 'Local variable in eval' do
  context 'Assignment in eval' do
    it 'works' do
      expect {
        eval <<-EOS
          var = true
          raise unless var
        EOS
      }.not_to raise_error
    end
  end

  context 'Assignment in eval in eval' do
    it 'fails with NameError' do
      expect {
        eval <<-EOS
          eval "var = true"
          var
        EOS
      }.to raise_error(NameError)
    end

    it 'succeeds if assigned in advance' do
      expect {
        eval <<-EOS
          var = false
          eval "var = true"
          raise unless var
        EOS
      }.not_to raise_error
    end
  end

end