zoomer_sentence_reversor.rb

# zoomer_sentence_reversor.rb
def sentence_reversor(str=nil)
  return "ERROR: Pass-in a string to reverse as an argument" if str.nil?
  str.split.reverse.join(" ")
end

# puts sentence_reversor(ARGV[0])

# zoomer_sentence_reversor_test.rb
require 'test/unit'
require './zoomer_sentence_reversor'

class ZoomerSentenceReversorTest < Test::Unit::TestCase
  def test_single_word_remains_unchanged
    assert(sentence_reversor('one') == 'one')
  end
  
  def test_sentence_gets_reversed
    assert(sentence_reversor('the big black cat') == 'cat black big the')
  end

  def test_error_message_when_no_input_provided
    assert(sentence_reversor() == 'ERROR: Pass-in a string to reverse as an argument')
  end
end