bountytest.rb

require 'minitest/autorun'

system "gem install psych -v 1.3.4 > /dev/null"
system "gem install bundler > /dev/null"

class PsychBundler < MiniTest::Unit::TestCase
  def test_ruby_version
    assert_equal 35410, RUBY_REVISION, 'you must be on 1.9.3-p194'
  end

  def test_psych_versions
    assert_equal '1.3.2', `ruby -rpsych -e'puts Psych::VERSION'`.chomp
    assert_equal '1.3.4', `ruby -e'gem "psych"; require "psych"; puts Psych::VERSION'`.chomp
  end

  def test_stdlib_with_bundler
    File.open('Gemfile', 'wb').close # make sure the Gemfile is empty

    assert_equal '1.3.2', `ruby -rbundler -e'Bundler.setup; require "psych"; p Psych::VERSION' 2>&1`.chomp
  end

  def test_gem_with_bundler
    File.open('Gemfile', 'wb') { |f|
      f.puts "source 'https://rubygems.org/'"
      f.puts "gem 'psych', '= 1.3.4'"
    }
    system "bundle install > /dev/null"
    assert_equal '1.3.4', `ruby -rbundler -e'Bundler.setup; require "psych"; puts Psych::VERSION'`.chomp
  end
end