Ruby's Kernel#catch and #throw

catchAndThrow.rb

def catchAndThrow(flow)
  i = 0
  if (flow == :return) then
    return i
  end

  catch do |label|
    # TODO:  something useful
    i += 1
    throw label if (flow == :throw)

    # TODO:  moar good stuffs
    i += 1
  end

  return i
end


require 'minitest/autorun'

describe 'catchAndThrow' do
  it 'executes a return flow' do
    _( catchAndThrow(:return) ).must_equal 0
  end
  it 'executes a catch-and-throw flow' do
    _( catchAndThrow(:throw) ).must_equal 1
  end
  it 'executes any other flow' do
    _( catchAndThrow(:other) ).must_equal 2
  end
end