class Gem::TestCase

# File lib/rubygems/test_case.rb, line 1133
def self.java_platform?
  Gem.java_platform?
end

# File lib/rubygems/test_case.rb, line 1165
def self.make_command
  ENV["make"] || ENV["MAKE"] || (vc_windows? ? 'nmake' : 'make')
end

# File lib/rubygems/test_case.rb, line 1198
def self.process_based_port
  @@process_based_port ||= 8000 + $$ % 1000
end

# File lib/rubygems/test_case.rb, line 1231
def self.rubybin
  ruby = ENV["RUBY"]
  return ruby if ruby
  ruby = "ruby"
  rubyexe = "#{ruby}.exe"

  3.times do
    if File.exist? ruby and File.executable? ruby and !File.directory? ruby
      return File.expand_path(ruby)
    end
    if File.exist? rubyexe and File.executable? rubyexe
      return File.expand_path(rubyexe)
    end
    ruby = File.join("..", ruby)
  end

  begin
    require "rbconfig"
    File.join(RbConfig::CONFIG["bindir"],
              RbConfig::CONFIG["ruby_install_name"] +
              RbConfig::CONFIG["EXEEXT"])
  rescue LoadError
    "ruby"
  end
end

# File lib/rubygems/test_case.rb, line 1148
def self.vc_windows?
  RUBY_PLATFORM.match('mswin')
end

# File lib/rubygems/test_case.rb, line 1119
def self.win_platform?
  Gem.win_platform?
end

# File lib/rubygems/test_case.rb, line 998
def add_to_fetcher(spec, path=nil, repo=@gem_repo)
  path ||= spec.cache_file
  @fetcher.data["#{@gem_repo}gems/#{spec.file_name}"] = read_binary(path)
end

# File lib/rubygems/test_case.rb, line 647
def all_spec_names
  Gem::Specification.map(&:full_name)
end

# File lib/rubygems/test_case.rb, line 600
def ask_if_ok(spec)
  true
end

# File lib/rubygems/test_case.rb, line 101
def assert_activate(expected, *specs)
  specs.each do |spec|
    case spec
    when String then
      Gem::Specification.find_by_name(spec).activate
    when Gem::Specification then
      spec.activate
    else
      flunk spec.inspect
    end
  end

  loaded = Gem.loaded_specs.values.map(&:full_name)

  assert_equal expected.sort, loaded.sort if expected
end

# File lib/rubygems/test_case.rb, line 251
def assert_contains_make_command(target, output, msg = nil)
  if output.match(/\n/)
    msg = message(msg) do
      'Expected output containing make command "%s": %s' % [
        ('%s %s' % [make_command, target]).rstrip,
        output.inspect
      ]
    end
  else
    msg = message(msg) do
      'Expected make command "%s": %s' % [
        ('%s %s' % [make_command, target]).rstrip,
        output.inspect
      ]
    end
  end

  assert scan_make_command_lines(output).any? { |line|
    make = parse_make_command_line(line)

    if make[:targets].include?(target)
      yield make, line if block_given?
      true
    else
      false
    end
  }, msg
end

# File lib/rubygems/test_case.rb, line 124
def assert_directory_exists(path, msg = nil)
  msg = message(msg) { "Expected path '#{path}' to be a directory" }
  assert_path_exists path
  assert File.directory?(path), msg
end

# File lib/rubygems/test_case.rb, line 119
def assert_path_exists(path, msg = nil)
  msg = message(msg) { "Expected path '#{path}' to exist" }
  assert File.exist?(path), msg
end

# File lib/rubygems/test_case.rb, line 173
def bindir(value)
  with_clean_path_to_ruby do
    bindir = RbConfig::CONFIG['bindir']

    if value
      RbConfig::CONFIG['bindir'] = value
    else
      RbConfig::CONFIG.delete 'bindir'
    end

    begin
      yield
    ensure
      if bindir
        RbConfig::CONFIG['bindir'] = bindir
      else
        RbConfig::CONFIG.delete 'bindir'
      end
    end
  end
end

# File lib/rubygems/test_case.rb, line 1212
def build_rake_in(good=true)
  gem_ruby = Gem.ruby
  Gem.ruby = @@ruby
  env_rake = ENV["rake"]
  rake = (good ? @@good_rake : @@bad_rake)
  ENV["rake"] = rake
  yield rake
ensure
  Gem.ruby = gem_ruby
  if env_rake
    ENV["rake"] = env_rake
  else
    ENV.delete("rake")
  end
end

# File lib/rubygems/test_case.rb, line 471
def common_installer_setup
  common_installer_teardown

  Gem.post_build do |installer|
    @post_build_hook_arg = installer
    true
  end

  Gem.post_install do |installer|
    @post_install_hook_arg = installer
  end

  Gem.post_uninstall do |uninstaller|
    @post_uninstall_hook_arg = uninstaller
  end

  Gem.pre_install do |installer|
    @pre_install_hook_arg = installer
    true
  end

  Gem.pre_uninstall do |uninstaller|
    @pre_uninstall_hook_arg = uninstaller
  end
end

# File lib/rubygems/test_case.rb, line 497
def common_installer_teardown
  Gem.post_build_hooks.clear
  Gem.post_install_hooks.clear
  Gem.done_installing_hooks.clear
  Gem.post_reset_hooks.clear
  Gem.post_uninstall_hooks.clear
  Gem.pre_install_hooks.clear
  Gem.pre_reset_hooks.clear
  Gem.pre_uninstall_hooks.clear
end

# File lib/rubygems/test_case.rb, line 134
def enable_shared(value)
  enable_shared = RbConfig::CONFIG['ENABLE_SHARED']
  RbConfig::CONFIG['ENABLE_SHARED'] = value

  yield
ensure
  if enable_shared
    RbConfig::CONFIG['enable_shared'] = enable_shared
  else
    RbConfig::CONFIG.delete 'enable_shared'
  end
end

# File lib/rubygems/test_case.rb, line 199
def exeext(value)
  exeext = RbConfig::CONFIG['EXEEXT']

  if value
    RbConfig::CONFIG['EXEEXT'] = value
  else
    RbConfig::CONFIG.delete 'EXEEXT'
  end

  yield
ensure
  if exeext
    RbConfig::CONFIG['EXEEXT'] = exeext
  else
    RbConfig::CONFIG.delete 'EXEEXT'
  end
end

# File lib/rubygems/test_case.rb, line 514
def git_gem(name = 'a', version = 1)
  have_git?

  directory = File.join 'git', name
  directory = File.expand_path directory

  git_spec = Gem::Specification.new name, version do |specification|
    yield specification if block_given?
  end

  FileUtils.mkdir_p directory

  gemspec = "#{name}.gemspec"

  File.open File.join(directory, gemspec), 'w' do |io|
    io.write git_spec.to_ruby
  end

  head = nil

  Dir.chdir directory do
    unless File.exist? '.git'
      system @git, 'init', '--quiet'
      system @git, 'config', 'user.name',  'RubyGems Tests'
      system @git, 'config', 'user.email', 'rubygems@example'
    end

    system @git, 'add', gemspec
    system @git, 'commit', '-a', '-m', 'a non-empty commit message', '--quiet'
    head = Gem::Util.popen(@git, 'rev-parse', 'master').strip
  end

  return name, git_spec.version, directory, head
end

# File lib/rubygems/test_case.rb, line 552
def have_git?
  return if in_path? @git

  skip 'cannot find git executable, use GIT environment variable to set'
end

# File lib/rubygems/test_case.rb, line 747
def install_default_gems(*specs)
  install_default_specs(*specs)

  specs.each do |spec|
    File.open spec.loaded_from, 'w' do |io|
      io.write spec.to_ruby_for_cache
    end
  end
end

# File lib/rubygems/test_case.rb, line 760
def install_default_specs(*specs)
  specs.each do |spec|
    installer = Gem::Installer.for_spec(spec, :install_as_default => true)
    installer.install
    Gem.register_default_spec(spec)
  end
end

# File lib/rubygems/test_case.rb, line 569
def install_gem(spec, options = {})
  require 'rubygems/installer'

  gem = File.join @tempdir, "gems", "#{spec.full_name}.gem"

  unless File.exist? gem
    use_ui Gem::MockGemUi.new do
      Dir.chdir @tempdir do
        Gem::Package.build spec
      end
    end

    gem = File.join(@tempdir, File.basename(spec.cache_file)).tap(&Gem::UNTAINT)
  end

  Gem::Installer.at(gem, options.merge({:wrappers => true})).install
end

# File lib/rubygems/test_case.rb, line 590
def install_gem_user(spec)
  install_gem spec, :user_install => true
end

# File lib/rubygems/test_case.rb, line 736
def install_specs(*specs)
  specs.each do |spec|
    Gem::Installer.for_spec(spec).install
  end

  Gem.searcher = nil
end

# File lib/rubygems/test_case.rb, line 1140
def java_platform?
  Gem.java_platform?
end

# File lib/rubygems/test_case.rb, line 768
def loaded_spec_names
  Gem.loaded_specs.values.map(&:full_name).sort
end

# File lib/rubygems/test_case.rb, line 1174
def make_command
  ENV["make"] || ENV["MAKE"] || (vc_windows? ? 'nmake' : 'make')
end

# File lib/rubygems/test_case.rb, line 609
def mu_pp(obj)
  s = String.new
  s = PP.pp obj, s
  s = s.force_encoding(Encoding.default_external)
  s.chomp
end

# File lib/rubygems/test_case.rb, line 786
def new_default_spec(name, version, deps = nil, *files)
  spec = util_spec name, version, deps

  spec.loaded_from = File.join(@default_spec_dir, spec.spec_name)
  spec.files = files

  lib_dir = File.join(@tempdir, "default_gems", "lib")
  lib_dir.instance_variable_set(:@gem_prelude_index, lib_dir)
  $LOAD_PATH.unshift(lib_dir)
  files.each do |file|
    rb_path = File.join(lib_dir, file)
    FileUtils.mkdir_p(File.dirname(rb_path))
    File.open(rb_path, "w") do |rb|
      rb << "# #{file}"
    end
  end

  spec
end

# File lib/rubygems/test_case.rb, line 1181
def nmake_found?
  system('nmake /? 1>NUL 2>&1')
end

# File lib/rubygems/test_case.rb, line 227
def parse_make_command_line(line)
  command, *args = line.shellsplit

  targets = []
  macros = {}

  args.each do |arg|
    case arg
    when /\A(\w+)=/
      macros[$1] = $'
    else
      targets << arg
    end
  end

  targets << '' if targets.empty?

  {
    :command => command,
    :targets => targets,
    :macros => macros,
  }
end

# File lib/rubygems/test_case.rb, line 1205
def process_based_port
  self.class.process_based_port
end

# File lib/rubygems/test_case.rb, line 661
def quick_gem(name, version='2')
  require 'rubygems/specification'

  spec = Gem::Specification.new do |s|
    s.platform    = Gem::Platform::RUBY
    s.name        = name
    s.version     = version
    s.author      = 'A User'
    s.email       = 'example@example.com'
    s.homepage    = 'http://example.com'
    s.summary     = "this is a summary"
    s.description = "This is a test description"

    yield(s) if block_given?
  end

  Gem::Specification.map # HACK: force specs to (re-)load before we write

  written_path = write_file spec.spec_file do |io|
    io.write spec.to_ruby_for_cache
  end

  spec.loaded_from = written_path

  Gem::Specification.reset

  return spec
end

# File lib/rubygems/test_case.rb, line 628
def read_binary(path)
  Gem.read_binary path
end

# File lib/rubygems/test_case.rb, line 619
def read_cache(path)
  File.open path.dup.tap(&Gem::UNTAINT), 'rb' do |io|
    Marshal.load io.read
  end
end

# File lib/rubygems/test_case.rb, line 218
def refute_path_exists(path, msg = nil)
  msg = message(msg) { "Expected path '#{path}' to not exist" }
  refute File.exist?(path), msg
end

# File lib/rubygems/test_case.rb, line 776
def save_loaded_features
  old_loaded_features = $LOADED_FEATURES.dup
  yield
ensure
  prefix = File.dirname(__FILE__) + "/"
  new_features = ($LOADED_FEATURES - old_loaded_features)
  old_loaded_features.concat(new_features.select {|f| f.rindex(prefix, 0)})
  $LOADED_FEATURES.replace old_loaded_features
end

# File lib/rubygems/test_case.rb, line 223
def scan_make_command_lines(output)
  output.scan(/^#{Regexp.escape make_command}(?:[[:blank:]].*)?$/)
end

# File lib/rubygems/test_case.rb, line 293
def setup
  super

  @orig_env = ENV.to_hash

  ENV['GEM_VENDOR'] = nil
  ENV['GEMRC'] = nil
  ENV['SOURCE_DATE_EPOCH'] = nil

  @current_dir = Dir.pwd
  @fetcher     = nil

  @back_ui                       = Gem::DefaultUserInteraction.ui
  @ui                            = Gem::MockGemUi.new
  # This needs to be a new instance since we call use_ui(@ui) when we want to
  # capture output
  Gem::DefaultUserInteraction.ui = Gem::MockGemUi.new

  tmpdir = File.realpath Dir.tmpdir
  tmpdir.tap(&Gem::UNTAINT)

  @tempdir = File.join(tmpdir, "test_rubygems_#{$$}")
  @tempdir.tap(&Gem::UNTAINT)

  FileUtils.mkdir_p @tempdir

  # This makes the tempdir consistent on Windows.
  # Dir.tmpdir may return short path name, but Dir[Dir.tmpdir] returns long
  # path name. https://bugs.ruby-lang.org/issues/10819
  # File.expand_path or File.realpath doesn't convert path name to long path
  # name. Only Dir[] (= Dir.glob) works.
  # Short and long path name is specific to Windows filesystem.
  if win_platform?
    @tempdir = Dir[@tempdir][0]
    @tempdir.tap(&Gem::UNTAINT)
  end

  @gemhome  = File.join @tempdir, 'gemhome'
  @userhome = File.join @tempdir, 'userhome'
  ENV["GEM_SPEC_CACHE"] = File.join @tempdir, 'spec_cache'

  @orig_ruby = if ENV['RUBY']
                 ruby = Gem.ruby
                 Gem.ruby = ENV['RUBY']
                 ruby
               end

  @git = ENV['GIT'] || 'git'

  Gem.ensure_gem_subdirectories @gemhome

  @orig_LOAD_PATH = $LOAD_PATH.dup
  $LOAD_PATH.map! do |s|
    expand_path = File.realpath(s) rescue File.expand_path(s)
    if expand_path != s
      expand_path.tap(&Gem::UNTAINT)
      if s.instance_variable_defined?(:@gem_prelude_index)
        expand_path.instance_variable_set(:@gem_prelude_index, expand_path)
      end
      expand_path.freeze if s.frozen?
      s = expand_path
    end
    s
  end

  Dir.chdir @tempdir

  ENV['HOME'] = @userhome
  Gem.instance_variable_set :@user_home, nil
  Gem.instance_variable_set :@gemdeps, nil
  Gem.instance_variable_set :@env_requirements_by_name, nil
  Gem.send :remove_instance_variable, :@ruby_version if
    Gem.instance_variables.include? :@ruby_version

  FileUtils.mkdir_p @gemhome
  FileUtils.mkdir_p @userhome

  ENV['GEM_PRIVATE_KEY_PASSPHRASE'] = PRIVATE_KEY_PASSPHRASE

  @default_dir = File.join @tempdir, 'default'
  @default_spec_dir = File.join @default_dir, "specifications", "default"
  if Gem.java_platform?
    @orig_default_gem_home = RbConfig::CONFIG['default_gem_home']
    RbConfig::CONFIG['default_gem_home'] = @default_dir
  else
    Gem.instance_variable_set(:@default_dir, @default_dir)
  end
  FileUtils.mkdir_p @default_spec_dir

  Gem::Specification.unresolved_deps.clear
  Gem.use_paths(@gemhome)

  Gem::Security.reset

  Gem.loaded_specs.clear
  Gem.instance_variable_set(:@activated_gem_paths, 0)
  Gem.clear_default_specs
  Bundler.reset!

  Gem.configuration.verbose = true
  Gem.configuration.update_sources = true

  Gem::RemoteFetcher.fetcher = Gem::FakeFetcher.new

  @gem_repo = "http://gems.example.com/"
  @uri = URI.parse @gem_repo
  Gem.sources.replace [@gem_repo]

  Gem.searcher = nil
  Gem::SpecFetcher.fetcher = nil

  @orig_arch = RbConfig::CONFIG['arch']

  if win_platform?
    util_set_arch 'i386-mswin32'
  else
    util_set_arch 'i686-darwin8.10.1'
  end

  @orig_hooks = {}
  %w[post_install_hooks done_installing_hooks post_uninstall_hooks pre_uninstall_hooks pre_install_hooks pre_reset_hooks post_reset_hooks post_build_hooks].each do |name|
    @orig_hooks[name] = Gem.send(name).dup
  end

  @marshal_version = "#{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}"
  @orig_LOADED_FEATURES = $LOADED_FEATURES.dup
end

# File lib/rubygems/test_case.rb, line 425
def teardown
  $LOAD_PATH.replace @orig_LOAD_PATH if @orig_LOAD_PATH
  if @orig_LOADED_FEATURES
    if @orig_LOAD_PATH
      paths = @orig_LOAD_PATH.map {|path| File.join(File.expand_path(path), "/")}
      ($LOADED_FEATURES - @orig_LOADED_FEATURES).each do |feat|
        unless paths.any? {|path| feat.start_with?(path)}
          $LOADED_FEATURES.delete(feat)
        end
      end
    else
      $LOADED_FEATURES.replace @orig_LOADED_FEATURES
    end
  end

  RbConfig::CONFIG['arch'] = @orig_arch

  if defined? Gem::RemoteFetcher
    Gem::RemoteFetcher.fetcher = nil
  end

  Dir.chdir @current_dir

  FileUtils.rm_rf @tempdir

  ENV.replace(@orig_env)

  Gem.ruby = @orig_ruby if @orig_ruby

  if Gem.java_platform?
    RbConfig::CONFIG['default_gem_home'] = @orig_default_gem_home
  else
    Gem.instance_variable_set :@default_dir, nil
  end

  Gem::Specification._clear_load_cache
  Gem::Specification.unresolved_deps.clear
  Gem::refresh

  @orig_hooks.each do |name, hooks|
    Gem.send(name).replace hooks
  end

  @back_ui.close
end

# File lib/rubygems/test_case.rb, line 596
def uninstall_gem(spec)
  require 'rubygems/uninstaller'

  Class.new(Gem::Uninstaller) do
    def ask_if_ok(spec)
      true
    end
  end.new(spec.name, :executables => true, :user_install => true).uninstall
end

# File lib/rubygems/test_case.rb, line 772
def unresolved_names
  Gem::Specification.unresolved_deps.values.map(&:to_s).sort
end

# File lib/rubygems/test_case.rb, line 694
def util_build_gem(spec)
  dir = spec.gem_dir
  FileUtils.mkdir_p dir

  Dir.chdir dir do
    spec.files.each do |file|
      next if File.exist? file
      FileUtils.mkdir_p File.dirname(file)

      File.open file, 'w' do |fp|
        fp.puts "# #{file}"
      end
    end

    use_ui Gem::MockGemUi.new do
      Gem::Package.build spec
    end

    cache = spec.cache_file
    FileUtils.mv File.basename(cache), cache
  end
end

# File lib/rubygems/test_case.rb, line 1107
def util_clear_RUBY_VERSION
  Object.send :remove_const, :RUBY_VERSION
  Object.send :remove_const, :RUBY_PATCHLEVEL     if defined?(RUBY_PATCHLEVEL)
  Object.send :remove_const, :RUBY_REVISION       if defined?(RUBY_REVISION)
  Object.send :remove_const, :RUBY_DESCRIPTION    if defined?(RUBY_DESCRIPTION)
  Object.send :remove_const, :RUBY_ENGINE
  Object.send :remove_const, :RUBY_ENGINE_VERSION if defined?(RUBY_ENGINE_VERSION)
end

# File lib/rubygems/test_case.rb, line 725
def util_clear_gems
  FileUtils.rm_rf File.join(@gemhome, "gems")
  FileUtils.mkdir File.join(@gemhome, "gems")
  FileUtils.rm_rf File.join(@gemhome, "specifications")
  FileUtils.mkdir File.join(@gemhome, "specifications")
  Gem::Specification.reset
end

# File lib/rubygems/test_case.rb, line 858
def util_gem(name, version, deps = nil, &block)
  if deps
    block = proc do |s|
      # Since Hash#each is unordered in 1.8, sort
      # the keys and iterate that way so the tests are
      # deterministic on all implementations.
      deps.keys.sort.each do |n|
        s.add_dependency n, (deps[n] || '>= 0')
      end
    end
  end

  spec = quick_gem(name, version, &block)

  util_build_gem spec

  cache_file = File.join @tempdir, 'gems', "#{spec.original_name}.gem"
  FileUtils.mkdir_p File.dirname cache_file
  FileUtils.mv spec.cache_file, cache_file
  FileUtils.rm spec.spec_file

  spec.loaded_from = nil

  [spec, cache_file]
end

# File lib/rubygems/test_case.rb, line 887
def util_gzip(data)
  out = StringIO.new

  Zlib::GzipWriter.wrap out do |io|
    io.write data
  end

  out.string
end

# File lib/rubygems/test_case.rb, line 915
  def util_make_gems(prerelease = false)
    @a1 = quick_gem 'a', '1' do |s|
      s.files = %w[lib/code.rb]
      s.require_paths = %w[lib]
      s.date = Gem::Specification::TODAY - 86400
      s.homepage = 'http://a.example.com'
      s.email = %w[example@example.com example2@example.com]
      s.authors = %w[Example Example2]
      s.description = <<-DESC
This line is really, really long.  So long, in fact, that it is more than eighty characters long!  The purpose of this line is for testing wrapping behavior because sometimes people don't wrap their text to eighty characters.  Without the wrapping, the text might not look good in the RSS feed.

Also, a list:
  * An entry that\'s actually kind of sort
  * an entry that\'s really long, which will probably get wrapped funny.  That's ok, somebody wasn't thinking straight when they made it more than eighty characters.
      DESC
    end

    init = proc do |s|
      s.files = %w[lib/code.rb]
      s.require_paths = %w[lib]
    end

    @a2      = quick_gem('a', '2',      &init)
    @a3a     = quick_gem('a', '3.a',    &init)
    @a_evil9 = quick_gem('a_evil', '9', &init)
    @b2      = quick_gem('b', '2',      &init)
    @c1_2    = quick_gem('c', '1.2',    &init)
    @x       = quick_gem('x', '1',      &init)
    @dep_x   = quick_gem('dep_x', '1') do |s|
      s.files = %w[lib/code.rb]
      s.require_paths = %w[lib]
      s.add_dependency 'x', '>= 1'
    end

    @pl1 = quick_gem 'pl', '1' do |s| # l for legacy
      s.files = %w[lib/code.rb]
      s.require_paths = %w[lib]
      s.platform = Gem::Platform.new 'i386-linux'
      s.instance_variable_set :@original_platform, 'i386-linux'
    end

    if prerelease
      @a2_pre = quick_gem('a', '2.a', &init)
      write_file File.join(*%W[gems #{@a2_pre.original_name} lib code.rb])
      util_build_gem @a2_pre
    end

    write_file File.join(*%W[gems #{@a1.original_name}      lib code.rb])
    write_file File.join(*%W[gems #{@a2.original_name}      lib code.rb])
    write_file File.join(*%W[gems #{@a3a.original_name}     lib code.rb])
    write_file File.join(*%W[gems #{@a_evil9.original_name} lib code.rb])
    write_file File.join(*%W[gems #{@b2.original_name}      lib code.rb])
    write_file File.join(*%W[gems #{@c1_2.original_name}    lib code.rb])
    write_file File.join(*%W[gems #{@pl1.original_name}     lib code.rb])
    write_file File.join(*%W[gems #{@x.original_name}       lib code.rb])
    write_file File.join(*%W[gems #{@dep_x.original_name}   lib code.rb])

    [@a1, @a2, @a3a, @a_evil9, @b2, @c1_2, @pl1, @x, @dep_x].each do |spec|
      util_build_gem spec
    end

    FileUtils.rm_r File.join(@gemhome, "gems", @pl1.original_name)
  end

# File lib/rubygems/test_case.rb, line 717
def util_remove_gem(spec)
  FileUtils.rm_rf spec.cache_file
  FileUtils.rm_rf spec.spec_file
end

# File lib/rubygems/test_case.rb, line 1092
def util_restore_RUBY_VERSION
  util_clear_RUBY_VERSION

  Object.const_set :RUBY_VERSION,        @RUBY_VERSION
  Object.const_set :RUBY_PATCHLEVEL,     @RUBY_PATCHLEVEL  if
    defined?(@RUBY_PATCHLEVEL)
  Object.const_set :RUBY_REVISION,       @RUBY_REVISION    if
    defined?(@RUBY_REVISION)
  Object.const_set :RUBY_DESCRIPTION,    @RUBY_DESCRIPTION if
    defined?(@RUBY_DESCRIPTION)
  Object.const_set :RUBY_ENGINE,         @RUBY_ENGINE
  Object.const_set :RUBY_ENGINE_VERSION, @RUBY_ENGINE_VERSION if
    defined?(@RUBY_ENGINE_VERSION)
end

# File lib/rubygems/test_case.rb, line 1070
def util_set_RUBY_VERSION(version, patchlevel = nil, revision = nil, description = nil, engine = "ruby", engine_version = nil)
  if Gem.instance_variables.include? :@ruby_version
    Gem.send :remove_instance_variable, :@ruby_version
  end

  @RUBY_VERSION        = RUBY_VERSION
  @RUBY_PATCHLEVEL     = RUBY_PATCHLEVEL     if defined?(RUBY_PATCHLEVEL)
  @RUBY_REVISION       = RUBY_REVISION       if defined?(RUBY_REVISION)
  @RUBY_DESCRIPTION    = RUBY_DESCRIPTION    if defined?(RUBY_DESCRIPTION)
  @RUBY_ENGINE         = RUBY_ENGINE
  @RUBY_ENGINE_VERSION = RUBY_ENGINE_VERSION if defined?(RUBY_ENGINE_VERSION)

  util_clear_RUBY_VERSION

  Object.const_set :RUBY_VERSION,        version
  Object.const_set :RUBY_PATCHLEVEL,     patchlevel     if patchlevel
  Object.const_set :RUBY_REVISION,       revision       if revision
  Object.const_set :RUBY_DESCRIPTION,    description    if description
  Object.const_set :RUBY_ENGINE,         engine
  Object.const_set :RUBY_ENGINE_VERSION, engine_version if engine_version
end

# File lib/rubygems/test_case.rb, line 982
def util_set_arch(arch)
  RbConfig::CONFIG['arch'] = arch
  platform = Gem::Platform.new arch

  Gem.instance_variable_set :@platforms, nil
  Gem::Platform.instance_variable_set :@local, nil

  yield if block_given?

  platform
end

# File lib/rubygems/test_case.rb, line 1006
def util_setup_spec_fetcher(*specs)
  all_specs = Gem::Specification.to_a + specs
  Gem::Specification._resort! all_specs

  spec_fetcher = Gem::SpecFetcher.fetcher

  prerelease, all = all_specs.partition { |spec| spec.version.prerelease?  }
  latest = Gem::Specification._latest_specs all_specs

  spec_fetcher.specs[@uri] = []
  all.each do |spec|
    spec_fetcher.specs[@uri] << spec.name_tuple
  end

  spec_fetcher.latest_specs[@uri] = []
  latest.each do |spec|
    spec_fetcher.latest_specs[@uri] << spec.name_tuple
  end

  spec_fetcher.prerelease_specs[@uri] = []
  prerelease.each do |spec|
    spec_fetcher.prerelease_specs[@uri] << spec.name_tuple
  end

  # HACK for test_download_to_cache
  unless Gem::RemoteFetcher === @fetcher
    v = Gem.marshal_version

    specs = all.map { |spec| spec.name_tuple }
    s_zip = util_gzip Marshal.dump Gem::NameTuple.to_basic specs

    latest_specs = latest.map do |spec|
      spec.name_tuple
    end

    l_zip = util_gzip Marshal.dump Gem::NameTuple.to_basic latest_specs

    prerelease_specs = prerelease.map { |spec| spec.name_tuple }
    p_zip = util_gzip Marshal.dump Gem::NameTuple.to_basic prerelease_specs

    @fetcher.data["#{@gem_repo}specs.#{v}.gz"]            = s_zip
    @fetcher.data["#{@gem_repo}latest_specs.#{v}.gz"]     = l_zip
    @fetcher.data["#{@gem_repo}prerelease_specs.#{v}.gz"] = p_zip

    v = Gem.marshal_version

    all_specs.each do |spec|
      path = "#{@gem_repo}quick/Marshal.#{v}/#{spec.original_name}.gemspec.rz"
      data = Marshal.dump spec
      data_deflate = Zlib::Deflate.deflate data
      @fetcher.data[path] = data_deflate
    end
  end

  nil # force errors
end

# File lib/rubygems/test_case.rb, line 810
def util_spec(name, version = 2, deps = nil, *files) # :yields: specification
  raise "deps or block, not both" if deps and block_given?

  spec = Gem::Specification.new do |s|
    s.platform    = Gem::Platform::RUBY
    s.name        = name
    s.version     = version
    s.author      = 'A User'
    s.email       = 'example@example.com'
    s.homepage    = 'http://example.com'
    s.summary     = "this is a summary"
    s.description = "This is a test description"

    s.files.push(*files) unless files.empty?

    yield s if block_given?
  end

  if deps
    # Since Hash#each is unordered in 1.8, sort the keys and iterate that
    # way so the tests are deterministic on all implementations.
    deps.keys.sort.each do |n|
      spec.add_dependency n, (deps[n] || '>= 0')
    end
  end

  unless files.empty?
    write_file spec.spec_file do |io|
      io.write spec.to_ruby_for_cache
    end

    util_build_gem spec

    cache_file = File.join @tempdir, 'gems', "#{spec.full_name}.gem"
    FileUtils.mkdir_p File.dirname cache_file
    FileUtils.mv spec.cache_file, cache_file
    FileUtils.rm spec.spec_file
  end

  return spec
end

# File lib/rubygems/test_case.rb, line 1066
def util_zip(data)
  Zlib::Deflate.deflate data
end

# File lib/rubygems/test_case.rb, line 1156
def vc_windows?
  RUBY_PLATFORM.match('mswin')
end

# File lib/rubygems/test_case.rb, line 151
def vendordir(value)
  vendordir = RbConfig::CONFIG['vendordir']

  if value
    RbConfig::CONFIG['vendordir'] = value
  else
    RbConfig::CONFIG.delete 'vendordir'
  end

  yield
ensure
  if vendordir
    RbConfig::CONFIG['vendordir'] = vendordir
  else
    RbConfig::CONFIG.delete 'vendordir'
  end
end

# File lib/rubygems/test_case.rb, line 1188
def wait_for_child_process_to_exit
  Process.wait if Process.respond_to?(:fork)
rescue Errno::ECHILD
end

# File lib/rubygems/test_case.rb, line 1126
def win_platform?
  Gem.win_platform?
end

# File lib/rubygems/test_case.rb, line 1257
def with_clean_path_to_ruby
  orig_ruby = Gem.ruby

  Gem.instance_variable_set :@ruby, nil

  yield
ensure
  Gem.instance_variable_set :@ruby, orig_ruby
end

# File lib/rubygems/test_case.rb, line 635
def write_file(path)
  path = File.join @gemhome, path unless Pathname.new(path).absolute?
  dir = File.dirname path
  FileUtils.mkdir_p dir unless File.directory? dir

  File.open path, 'wb' do |io|
    yield io if block_given?
  end

  path
end