Example specs for https://groups.google.com/forum/#!topic/rspec/GndcucJCgEM

sentence_spec.rb

class Sentence
  def test(sen)
    first = sen[0]
    last = sen.split('').last
    rest = sen[1..-1]
    word_arr = sen.split
    word_arr_len = word_arr.length

    unless first == first.upcase then
      puts "the first letter is not in uppercase"
    end

    if word_arr_len == 1 then
      puts "there must be spaces between words"
    end

    unless last == "." || last = last.upcase then
      puts "the sentence should end with a full stop"
    end

    unless (sen =~ /[A-Z]{2,}/) == nil then
      puts "no two consecutive upper case letters are allowed"
    end

    unless sen == word_arr.join(" ")  then
      puts "no two consecutive spaces are allowed"
    end
  end
end

RSpec.describe Sentence do
  let(:sentence) { Sentence.new }

  it "prints nothing when given a valid sentence" do
    expect {
      sentence.test("Hello world.")
    }.not_to output.to_stdout
  end

  it "requires the first word to be capitalized" do
    expect {
      sentence.test("hello world.")
    }.to output(/first letter is not in uppercase/).to_stdout
  end
end

Hello Myron,

Thank you so much for the solved code!