added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 868 insertions, 0 deletions

diff --git a/trunk/test/rubygems/test_gem_installer.rb b/trunk/test/rubygems/test_gem_installer.rb
new file mode 100644
index 0000000000..eb9743dd42
--- /dev/null
+++ b/trunk/test/rubygems/test_gem_installer.rb
@@ -0,0 +1,868 @@
+#--
+# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
+# All rights reserved.
+# See LICENSE.txt for permissions.
+#++
+
+require File.join(File.expand_path(File.dirname(__FILE__)),
+                  'gem_installer_test_case')
+
+class TestGemInstaller < GemInstallerTestCase
+
+  def test_app_script_text
+    util_make_exec '2', ''
+
+    expected = <<-EOF
+#!#{Gem.ruby}
+#
+# This file was generated by RubyGems.
+#
+# The application 'a' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+require 'rubygems'
+
+version = \">= 0\"
+
+if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
+  version = $1
+  ARGV.shift
+end
+
+gem 'a', version
+load 'my_exec'
+    EOF
+
+    wrapper = @installer.app_script_text 'my_exec'
+    assert_equal expected, wrapper
+  end
+
+  def test_build_extensions_none
+    use_ui @ui do
+      @installer.build_extensions
+    end
+
+    assert_equal '', @ui.output
+    assert_equal '', @ui.error
+
+    assert !File.exist?('gem_make.out')
+  end
+
+  def test_build_extensions_extconf_bad
+    @spec.extensions << 'extconf.rb'
+
+    e = assert_raise Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @installer.build_extensions
+      end
+    end
+
+    assert_match(/\AERROR: Failed to build gem native extension.$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    gem_make_out = File.join @gemhome, 'gems', @spec.full_name, 'gem_make.out'
+    expected = <<-EOF
+#{Gem.ruby} extconf.rb
+#{Gem.ruby}: No such file or directory -- extconf.rb (LoadError)
+    EOF
+
+    assert_equal expected, File.read(gem_make_out)
+  end
+
+  def test_build_extensions_unsupported
+    @spec.extensions << nil
+
+    e = assert_raise Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @installer.build_extensions
+      end
+    end
+
+    assert_match(/^No builder for extension ''$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    assert_equal "No builder for extension ''\n", File.read('gem_make.out')
+  ensure
+    FileUtils.rm_f 'gem_make.out'
+  end
+
+  def test_ensure_dependency
+    dep = Gem::Dependency.new 'a', '>= 2'
+    assert @installer.ensure_dependency(@spec, dep)
+
+    dep = Gem::Dependency.new 'b', '> 2'
+    e = assert_raise Gem::InstallError do
+      @installer.ensure_dependency @spec, dep
+    end
+
+    assert_equal 'a requires b (> 2, runtime)', e.message
+  end
+
+  def test_expand_and_validate_gem_dir
+    @installer.gem_dir = '/nonexistent'
+    expanded_gem_dir = @installer.send(:expand_and_validate_gem_dir)
+    if win_platform?
+      expected = File.expand_path('/nonexistent').downcase
+      expanded_gem_dir = expanded_gem_dir.downcase
+    else
+      expected = '/nonexistent'
+    end
+
+    assert_equal expected, expanded_gem_dir
+  end
+
+  def test_extract_files
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 7, 'mode' => 0400, 'path' => 'thefile'}, 'thefile']]
+    end
+
+    @installer.format = format
+
+    @installer.extract_files
+
+    thefile_path = File.join(util_gem_dir, 'thefile')
+    assert_equal 'thefile', File.read(thefile_path)
+
+    unless Gem.win_platform? then
+      assert_equal 0400, File.stat(thefile_path).mode & 0777
+    end
+  end
+
+  def test_extract_files_bad_dest
+    @installer.gem_dir = 'somedir'
+    @installer.format = nil
+    e = assert_raise ArgumentError do
+      @installer.extract_files
+    end
+
+    assert_equal 'format required to extract from', e.message
+  end
+
+  def test_extract_files_relative
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 10, 'mode' => 0644, 'path' => '../thefile'}, '../thefile']]
+    end
+
+    @installer.format = format
+
+    e = assert_raise Gem::InstallError do
+      @installer.extract_files
+    end
+
+    assert_equal "attempt to install file into \"../thefile\" under #{util_gem_dir.inspect}",
+                 e.message
+    assert_equal false, File.file?(File.join(@tempdir, '../thefile')),
+                 "You may need to remove this file if you broke the test once"
+  end
+
+  def test_extract_files_absolute
+    format = Object.new
+    def format.file_entries
+      [[{'size' => 8, 'mode' => 0644, 'path' => '/thefile'}, '/thefile']]
+    end
+
+    @installer.format = format
+
+    e = assert_raise Gem::InstallError do
+      @installer.extract_files
+    end
+
+    assert_equal 'attempt to install file into "/thefile"', e.message
+    assert_equal false, File.file?(File.join('/thefile')),
+                 "You may need to remove this file if you broke the test once"
+  end
+
+  def test_generate_bin_bindir
+    @installer.wrappers = true
+
+    @spec.executables = ["my_exec"]
+    @spec.bindir = '.'
+
+    exec_file = @installer.formatted_program_filename "my_exec"
+    exec_path = File.join util_gem_dir(@spec.version), exec_file
+    File.open exec_path, 'w' do |f|
+      f.puts '#!/usr/bin/ruby'
+    end
+
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_script
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_script_format
+    @installer.format_executable = true
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    Gem::Installer.exec_format = 'foo-%s-bar'
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join util_inst_bindir, 'foo-my_exec-bar'
+    assert_equal true, File.exist?(installed_exec)
+  ensure
+    Gem::Installer.exec_format = nil
+  end
+
+  def test_generate_bin_script_format_disabled
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    Gem::Installer.exec_format = 'foo-%s-bar'
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join util_inst_bindir, 'my_exec'
+    assert_equal true, File.exist?(installed_exec)
+  ensure
+    Gem::Installer.exec_format = nil
+  end
+
+  def test_generate_bin_script_install_dir
+    @installer.wrappers = true
+    @spec.executables = ["my_exec"]
+
+    gem_dir = File.join "#{@gemhome}2", 'gems', @spec.full_name
+    gem_bindir = File.join gem_dir, 'bin'
+    FileUtils.mkdir_p gem_bindir
+    File.open File.join(gem_bindir, "my_exec"), 'w' do |f|
+      f.puts "#!/bin/ruby"
+    end
+
+    @installer.gem_home = "#{@gemhome}2"
+    @installer.gem_dir = gem_dir
+
+    @installer.generate_bin
+
+    installed_exec = File.join("#{@gemhome}2", 'bin', 'my_exec')
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_script_no_execs
+    @installer.wrappers = true
+    @installer.generate_bin
+    assert_equal false, File.exist?(util_inst_bindir)
+  end
+
+  def test_generate_bin_script_no_perms
+    @installer.wrappers = true
+    util_make_exec
+
+    Dir.mkdir util_inst_bindir
+    File.chmod 0000, util_inst_bindir
+
+    assert_raises Gem::FilePermissionError do
+      @installer.generate_bin
+    end
+
+  ensure
+    File.chmod 0700, util_inst_bindir unless $DEBUG
+  end
+
+  def test_generate_bin_script_no_shebang
+    @installer.wrappers = true
+    @spec.executables = ["my_exec"]
+
+    gem_dir = File.join @gemhome, 'gems', @spec.full_name
+    gem_bindir = File.join gem_dir, 'bin'
+    FileUtils.mkdir_p gem_bindir
+    File.open File.join(gem_bindir, "my_exec"), 'w' do |f|
+      f.puts "blah blah blah"
+    end
+
+    @installer.generate_bin
+
+    installed_exec = File.join @gemhome, 'bin', 'my_exec'
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal 0100755, File.stat(installed_exec).mode unless win_platform?
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+    # HACK some gems don't have #! in their executables, restore 2008/06
+    #assert_no_match %r|generated by RubyGems|, wrapper
+  end
+
+  def test_generate_bin_script_wrappers
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+
+    real_exec = File.join util_gem_dir, 'bin', 'my_exec'
+
+    # fake --no-wrappers for previous install
+    unless Gem.win_platform? then
+      FileUtils.mkdir_p File.dirname(installed_exec)
+      FileUtils.ln_s real_exec, installed_exec
+    end
+
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    assert_equal true, File.exist?(installed_exec)
+    assert_equal(0100755, File.stat(installed_exec).mode) unless win_platform?
+
+    assert_match %r|generated by RubyGems|, File.read(installed_exec)
+
+    assert_no_match %r|generated by RubyGems|, File.read(real_exec),
+                    'real executable overwritten'
+  end
+
+  def test_generate_bin_symlink
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.symlink?(installed_exec)
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+  end
+
+  def test_generate_bin_symlink_no_execs
+    @installer.wrappers = false
+    @installer.generate_bin
+    assert_equal false, File.exist?(util_inst_bindir)
+  end
+
+  def test_generate_bin_symlink_no_perms
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    Dir.mkdir util_inst_bindir
+    File.chmod 0000, util_inst_bindir
+
+    assert_raises Gem::FilePermissionError do
+      @installer.generate_bin
+    end
+
+  ensure
+    File.chmod 0700, util_inst_bindir unless $DEBUG
+  end
+
+  def test_generate_bin_symlink_update_newer
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+
+    @spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "3"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    util_make_exec '3'
+    @installer.gem_dir = File.join util_gem_dir('3')
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_bindir('3'), "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink moved to latest version")
+  end
+
+  def test_generate_bin_symlink_update_older
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir, "bin", "my_exec"),
+                 File.readlink(installed_exec))
+
+    spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "1"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    util_make_exec '1'
+    @installer.gem_dir = util_gem_dir('1')
+    @installer.spec = spec
+
+    @installer.generate_bin
+
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir('2'), "bin", "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink not moved")
+  end
+
+  def test_generate_bin_symlink_update_remove_wrapper
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = true
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+
+    @spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "3"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    @installer.wrappers = false
+    util_make_exec '3'
+    @installer.gem_dir = util_gem_dir '3'
+    @installer.generate_bin
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal(File.join(util_gem_dir('3'), "bin", "my_exec"),
+                 File.readlink(installed_exec),
+                 "Ensure symlink moved to latest version")
+  end
+
+  def test_generate_bin_symlink_win32
+    old_win_platform = Gem.win_platform?
+    Gem.win_platform = true
+    @installer.wrappers = false
+    util_make_exec
+    @installer.gem_dir = util_gem_dir
+
+    use_ui @ui do
+      @installer.generate_bin
+    end
+
+    assert_equal true, File.directory?(util_inst_bindir)
+    installed_exec = File.join(util_inst_bindir, "my_exec")
+    assert_equal true, File.exist?(installed_exec)
+
+    assert_match(/Unable to use symlinks on Windows, installing wrapper/i,
+                 @ui.error)
+
+    wrapper = File.read installed_exec
+    assert_match(/generated by RubyGems/, wrapper)
+  ensure
+    Gem.win_platform = old_win_platform
+  end
+
+  def test_generate_bin_uses_default_shebang
+    return if win_platform? #Windows FS do not support symlinks
+
+    @installer.wrappers = true
+    util_make_exec
+
+    @installer.generate_bin
+
+    default_shebang = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
+    shebang_line = open("#{@gemhome}/bin/my_exec") { |f| f.readlines.first }
+    assert_match(/\A#!/, shebang_line)
+    assert_match(/#{default_shebang}/, shebang_line)
+  end
+
+  def test_initialize
+    spec = quick_gem 'a' do |s| s.platform = Gem::Platform.new 'mswin32' end
+    gem = File.join @tempdir, "#{spec.full_name}.gem"
+
+    Dir.mkdir util_inst_bindir
+    util_build_gem spec
+    FileUtils.mv File.join(@gemhome, 'cache', "#{spec.full_name}.gem"),
+                 @tempdir
+
+    installer = Gem::Installer.new gem
+
+    assert_equal File.join(@gemhome, 'gems', spec.full_name), installer.gem_dir
+  end
+
+  def test_install
+    Dir.mkdir util_inst_bindir
+    util_setup_gem
+
+    build_rake_in do
+      use_ui @ui do
+        assert_equal @spec, @installer.install
+      end
+    end
+
+    gemdir = File.join @gemhome, 'gems', @spec.full_name
+    assert File.exist?(gemdir)
+
+    exe = File.join(gemdir, 'bin', 'executable')
+    assert File.exist?(exe)
+    exe_mode = File.stat(exe).mode & 0111
+    assert_equal 0111, exe_mode, "0%o" % exe_mode unless win_platform?
+
+    assert File.exist?(File.join(gemdir, 'lib', 'code.rb'))
+
+    assert File.exist?(File.join(gemdir, 'ext', 'a', 'Rakefile'))
+
+    spec_file = File.join(@gemhome, 'specifications',
+                          "#{@spec.full_name}.gemspec")
+
+    assert_equal spec_file, @spec.loaded_from
+    assert File.exist?(spec_file)
+  end
+
+  def test_install_bad_gem
+    gem = nil
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+      gem = File.join @tempdir, "#{@spec.full_name}.gem"
+    end
+
+    gem_data = File.open gem, 'rb' do |fp| fp.read 1024 end
+    File.open gem, 'wb' do |fp| fp.write gem_data end
+
+    e = assert_raise Gem::InstallError do
+      use_ui @ui do
+        @installer = Gem::Installer.new gem
+        @installer.install
+      end
+    end
+
+    assert_equal "invalid gem format for #{gem}", e.message
+  end
+
+  def test_install_check_dependencies
+    @spec.add_dependency 'b', '> 5'
+    util_setup_gem
+
+    use_ui @ui do
+      assert_raise Gem::InstallError do
+        @installer.install
+      end
+    end
+  end
+
+  def test_install_force
+    use_ui @ui do
+      installer = Gem::Installer.new old_ruby_required, :force => true
+      installer.install
+    end
+
+    gem_dir = File.join(@gemhome, 'gems', 'old_ruby_required-1')
+    assert File.exist?(gem_dir)
+  end
+
+  def test_install_ignore_dependencies
+    Dir.mkdir util_inst_bindir
+    @spec.add_dependency 'b', '> 5'
+    util_setup_gem
+    @installer.ignore_dependencies = true
+
+    build_rake_in do
+      use_ui @ui do
+        assert_equal @spec, @installer.install
+      end
+    end
+
+    gemdir = File.join @gemhome, 'gems', @spec.full_name
+    assert File.exist?(gemdir)
+
+    exe = File.join(gemdir, 'bin', 'executable')
+    assert File.exist?(exe)
+    exe_mode = File.stat(exe).mode & 0111
+    assert_equal 0111, exe_mode, "0%o" % exe_mode unless win_platform?
+    assert File.exist?(File.join(gemdir, 'lib', 'code.rb'))
+
+    assert File.exist?(File.join(@gemhome, 'specifications',
+                                 "#{@spec.full_name}.gemspec"))
+  end
+
+  def test_install_missing_dirs
+    FileUtils.rm_f File.join(Gem.dir, 'cache')
+    FileUtils.rm_f File.join(Gem.dir, 'docs')
+    FileUtils.rm_f File.join(Gem.dir, 'specifications')
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+      gem = File.join @tempdir, "#{@spec.full_name}.gem"
+
+      @installer.install
+    end
+
+    File.directory? File.join(Gem.dir, 'cache')
+    File.directory? File.join(Gem.dir, 'docs')
+    File.directory? File.join(Gem.dir, 'specifications')
+
+    assert File.exist?(File.join(@gemhome, 'cache', "#{@spec.full_name}.gem"))
+    assert File.exist?(File.join(@gemhome, 'specifications',
+                                 "#{@spec.full_name}.gemspec"))
+  end
+  unless win_platform? # File.chmod doesn't work
+    def test_install_user_local_fallback
+      Dir.mkdir util_inst_bindir
+      File.chmod 0755, @userhome
+      File.chmod 0000, util_inst_bindir
+      File.chmod 0000, Gem.dir
+      install_dir = File.join @userhome, '.gem', 'gems', @spec.full_name
+      @spec.executables = ["executable"]
+
+      build_rake_in do
+        use_ui @ui do
+          util_setup_gem
+          @installer.install
+        end
+      end
+    
+      assert File.exist?(File.join(install_dir, 'lib', 'code.rb'))
+      assert File.exist?(File.join(@userhome, '.gem', 'bin', 'executable'))
+    ensure
+      File.chmod 0755, Gem.dir
+      File.chmod 0755, util_inst_bindir
+    end
+
+    def test_install_bindir_read_only
+      Dir.mkdir util_inst_bindir
+      File.chmod 0755, @userhome
+      File.chmod 0000, util_inst_bindir
+
+      build_rake_in do
+        use_ui @ui do
+          setup
+          util_setup_gem
+          @installer.install
+        end
+      end
+      
+      assert File.exist?(File.join(@userhome, '.gem', 'bin', 'executable'))
+    ensure
+      File.chmod 0755, util_inst_bindir
+    end
+  end
+  
+  def test_install_with_message
+    @spec.post_install_message = 'I am a shiny gem!'
+
+    use_ui @ui do
+      Dir.chdir @tempdir do Gem::Builder.new(@spec).build end
+
+      @installer.install
+    end
+
+    assert_match %r|I am a shiny gem!|, @ui.output
+  end
+
+  def test_install_wrong_ruby_version
+    use_ui @ui do
+      installer = Gem::Installer.new old_ruby_required
+      e = assert_raise Gem::InstallError do
+        installer.install
+      end
+      assert_equal 'old_ruby_required requires Ruby version = 1.4.6',
+                   e.message
+    end
+  end
+
+  def test_install_wrong_rubygems_version
+    spec = quick_gem 'old_rubygems_required', '1' do |s|
+      s.required_rubygems_version = '< 0'
+    end
+
+    util_build_gem spec
+
+    gem = File.join @gemhome, 'cache', "#{spec.full_name}.gem"
+
+    use_ui @ui do
+      @installer = Gem::Installer.new gem
+      e = assert_raise Gem::InstallError do
+        @installer.install
+      end
+      assert_equal 'old_rubygems_required requires RubyGems version < 0',
+                   e.message
+    end
+  end
+
+  def test_installation_satisfies_dependency_eh
+    dep = Gem::Dependency.new 'a', '>= 2'
+    assert @installer.installation_satisfies_dependency?(dep)
+
+    dep = Gem::Dependency.new 'a', '> 2'
+    assert ! @installer.installation_satisfies_dependency?(dep)
+  end
+
+  def test_shebang
+    util_make_exec '2', "#!/usr/bin/ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_arguments
+    util_make_exec '2', "#!/usr/bin/ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_empty
+    util_make_exec '2', ''
+
+    shebang = @installer.shebang 'my_exec'
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_env
+    util_make_exec '2', "#!/usr/bin/env ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_env_arguments
+    util_make_exec '2', "#!/usr/bin/env ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_env_shebang
+    util_make_exec '2', ''
+    @installer.env_shebang = true
+
+    shebang = @installer.shebang 'my_exec'
+    assert_equal "#!/usr/bin/env #{Gem::ConfigMap[:RUBY_INSTALL_NAME]}", shebang
+  end
+
+  def test_shebang_nested
+    util_make_exec '2', "#!/opt/local/ruby/bin/ruby"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_nested_arguments
+    util_make_exec '2', "#!/opt/local/ruby/bin/ruby -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_version
+    util_make_exec '2', "#!/usr/bin/ruby18"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_version_arguments
+    util_make_exec '2', "#!/usr/bin/ruby18 -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_shebang_version_env
+    util_make_exec '2', "#!/usr/bin/env ruby18"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby}", shebang
+  end
+
+  def test_shebang_version_env_arguments
+    util_make_exec '2', "#!/usr/bin/env ruby18 -ws"
+
+    shebang = @installer.shebang 'my_exec'
+
+    assert_equal "#!#{Gem.ruby} -ws", shebang
+  end
+
+  def test_unpack
+    util_setup_gem
+
+    dest = File.join @gemhome, 'gems', @spec.full_name
+
+    @installer.unpack dest
+
+    assert File.exist?(File.join(dest, 'lib', 'code.rb'))
+    assert File.exist?(File.join(dest, 'bin', 'executable'))
+  end
+
+  def test_write_spec
+    spec_dir = File.join @gemhome, 'specifications'
+    spec_file = File.join spec_dir, "#{@spec.full_name}.gemspec"
+    FileUtils.rm spec_file
+    assert !File.exist?(spec_file)
+
+    @installer.spec = @spec
+    @installer.gem_home = @gemhome
+
+    @installer.write_spec
+
+    assert File.exist?(spec_file)
+    assert_equal @spec, eval(File.read(spec_file))
+  end
+
+  def old_ruby_required
+    spec = quick_gem 'old_ruby_required', '1' do |s|
+      s.required_ruby_version = '= 1.4.6'
+    end
+
+    util_build_gem spec
+
+    File.join @gemhome, 'cache', "#{spec.full_name}.gem"
+  end
+
+end
+