input-test-two.rb

class Fancy
  def self.test
    puts "Ask me a question:"
    t = gets
    puts "You said: #{t}"
    puts "What about this other thing?"
    t2 = gets
    puts "Now you said: #{t2}"
  end
end

require 'test/unit'
require 'stringio'

require 'rubygems'
require 'minitest/autorun'
class FancyTest < MiniTest::Unit::TestCase

  def preload_stdin(*values)
    orig_stdin = $stdin.dup
    fake_stdin = StringIO.new(values.join("\n"))
    $stdin = fake_stdin
    yield
  ensure
    $stdin = orig_stdin
  end

  def test_can_provide_input
    output,err = capture_io do
      preload_stdin("Some text","Some other text") do
        Fancy.test
      end
    end
    assert_match /You said: Some text/, output
    assert_match /Now you said: Some other text/, output
  end
end