Merge bundler to standard libraries.

  rubygems 2.7.x depends bundler-1.15.x. This is preparation for
  rubygems and bundler migration.

  * lib/bundler.rb, lib/bundler/*: files of bundler-1.15.4
  * spec/bundler/*: rspec examples of bundler-1.15.4. I applied patches.
    * https://github.com/bundler/bundler/pull/6007
    * Exclude not working examples on ruby repository.
    * Fake ruby interpriter instead of installed ruby.
  * Makefile.in: Added test task named `test-bundler`. This task is only
    working macOS/linux yet. I'm going to support Windows environment later.
  * tool/sync_default_gems.rb: Added sync task for bundler.

  [Feature #12733][ruby-core:77172]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59779 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

5 files changed, 708 insertions, 0 deletions

diff --git a/spec/bundler/realworld/dependency_api_spec.rb b/spec/bundler/realworld/dependency_api_spec.rb
new file mode 100644
index 0000000000..468fa3644c
--- /dev/null
+++ b/spec/bundler/realworld/dependency_api_spec.rb
@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe "gemcutter's dependency API", :realworld => true do
+  context "when Gemcutter API takes too long to respond" do
+    before do
+      require_rack
+
+      port = find_unused_port
+      @server_uri = "http://127.0.0.1:#{port}"
+
+      require File.expand_path("../../support/artifice/endpoint_timeout", __FILE__)
+      require "thread"
+      @t = Thread.new do
+        server = Rack::Server.start(:app       => EndpointTimeout,
+                                    :Host      => "0.0.0.0",
+                                    :Port      => port,
+                                    :server    => "webrick",
+                                    :AccessLog => [],
+                                    :Logger    => Spec::SilentLogger.new)
+        server.start
+      end
+      @t.run
+
+      wait_for_server("127.0.0.1", port)
+    end
+
+    after do
+      Artifice.deactivate
+      @t.kill
+      @t.join
+    end
+
+    it "times out and falls back on the modern index" do
+      gemfile <<-G
+        source "#{@server_uri}"
+        gem "rack"
+
+        old_v, $VERBOSE = $VERBOSE, nil
+        Bundler::Fetcher.api_timeout = 1
+        $VERBOSE = old_v
+      G
+
+      bundle :install
+      expect(out).to include("Fetching source index from #{@server_uri}/")
+      expect(the_bundle).to include_gems "rack 1.0.0"
+    end
+  end
+end
diff --git a/spec/bundler/realworld/edgecases_spec.rb b/spec/bundler/realworld/edgecases_spec.rb
new file mode 100644
index 0000000000..302fd57cf0
--- /dev/null
+++ b/spec/bundler/realworld/edgecases_spec.rb
@@ -0,0 +1,382 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe "real world edgecases", :realworld => true, :sometimes => true do
+  def rubygems_version(name, requirement)
+    require "bundler/source/rubygems/remote"
+    require "bundler/fetcher"
+    source = Bundler::Source::Rubygems::Remote.new(URI("https://rubygems.org"))
+    fetcher = Bundler::Fetcher.new(source)
+    index = fetcher.specs([name], nil)
+    rubygem = index.search(Gem::Dependency.new(name, requirement)).last
+    if rubygem.nil?
+      raise "Could not find #{name} (#{requirement}) on rubygems.org!\n" \
+        "Found specs:\n#{index.send(:specs).inspect}"
+    end
+    "#{name} (#{rubygem.version})"
+  end
+
+  # there is no rbx-relative-require gem that will install on 1.9
+  it "ignores extra gems with bad platforms", :ruby => "~> 1.8.7" do
+    gemfile <<-G
+      source "https://rubygems.org"
+      gem "linecache", "0.46"
+    G
+    bundle :lock
+    expect(err).to lack_errors
+    expect(exitstatus).to eq(0) if exitstatus
+  end
+
+  # https://github.com/bundler/bundler/issues/1202
+  it "bundle cache works with rubygems 1.3.7 and pre gems",
+    :ruby => "~> 1.8.7", :rubygems => "~> 1.3.7" do
+    install_gemfile <<-G
+      source "https://rubygems.org"
+      gem "rack",          "1.3.0.beta2"
+      gem "will_paginate", "3.0.pre2"
+    G
+    bundle :cache
+    expect(out).not_to include("Removing outdated .gem files from vendor/cache")
+  end
+
+  # https://github.com/bundler/bundler/issues/1486
+  # this is a hash collision that only manifests on 1.8.7
+  it "finds the correct child versions", :ruby => "~> 1.8.7" do
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem 'i18n', '~> 0.6.0'
+      gem 'activesupport', '~> 3.0.5'
+      gem 'activerecord', '~> 3.0.5'
+      gem 'builder', '~> 2.1.2'
+    G
+    bundle :lock
+    expect(lockfile).to include("activemodel (3.0.5)")
+  end
+
+  it "resolves dependencies correctly", :ruby => "1.9.3" do
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem 'rails', '~> 3.0'
+      gem 'capybara', '~> 2.2.0'
+      gem 'rack-cache', '1.2.0' # last version that works on Ruby 1.9
+    G
+    bundle! :lock
+    expect(lockfile).to include(rubygems_version("rails", "~> 3.0"))
+    expect(lockfile).to include("capybara (2.2.1)")
+  end
+
+  it "installs the latest version of gxapi_rails", :ruby => "1.9.3" do
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem "sass-rails"
+      gem "rails", "~> 3"
+      gem "gxapi_rails", "< 0.1.0" # 0.1.0 was released way after the test was written
+      gem 'rack-cache', '1.2.0' # last version that works on Ruby 1.9
+    G
+    bundle :lock
+    expect(lockfile).to include("gxapi_rails (0.0.6)")
+  end
+
+  it "installs the latest version of i18n" do
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem "i18n", "~> 0.6.0"
+      gem "activesupport", "~> 3.0"
+      gem "activerecord", "~> 3.0"
+      gem "builder", "~> 2.1.2"
+    G
+    bundle :lock
+    expect(lockfile).to include(rubygems_version("i18n", "~> 0.6.0"))
+    expect(lockfile).to include(rubygems_version("activesupport", "~> 3.0"))
+  end
+
+  it "is able to update a top-level dependency when there is a conflict on a shared transitive child", :ruby => "2.1" do
+    # from https://github.com/bundler/bundler/issues/5031
+
+    gemfile <<-G
+      source "https://rubygems.org"
+      gem 'rails', '~> 4.2.7.1'
+      gem 'paperclip', '~> 5.1.0'
+    G
+
+    lockfile <<-L
+      GEM
+        remote: https://rubygems.org/
+        specs:
+          actionmailer (4.2.7.1)
+            actionpack (= 4.2.7.1)
+            actionview (= 4.2.7.1)
+            activejob (= 4.2.7.1)
+            mail (~> 2.5, >= 2.5.4)
+            rails-dom-testing (~> 1.0, >= 1.0.5)
+          actionpack (4.2.7.1)
+            actionview (= 4.2.7.1)
+            activesupport (= 4.2.7.1)
+            rack (~> 1.6)
+            rack-test (~> 0.6.2)
+            rails-dom-testing (~> 1.0, >= 1.0.5)
+            rails-html-sanitizer (~> 1.0, >= 1.0.2)
+          actionview (4.2.7.1)
+            activesupport (= 4.2.7.1)
+            builder (~> 3.1)
+            erubis (~> 2.7.0)
+            rails-dom-testing (~> 1.0, >= 1.0.5)
+            rails-html-sanitizer (~> 1.0, >= 1.0.2)
+          activejob (4.2.7.1)
+            activesupport (= 4.2.7.1)
+            globalid (>= 0.3.0)
+          activemodel (4.2.7.1)
+            activesupport (= 4.2.7.1)
+            builder (~> 3.1)
+          activerecord (4.2.7.1)
+            activemodel (= 4.2.7.1)
+            activesupport (= 4.2.7.1)
+            arel (~> 6.0)
+          activesupport (4.2.7.1)
+            i18n (~> 0.7)
+            json (~> 1.7, >= 1.7.7)
+            minitest (~> 5.1)
+            thread_safe (~> 0.3, >= 0.3.4)
+            tzinfo (~> 1.1)
+          arel (6.0.3)
+          builder (3.2.2)
+          climate_control (0.0.3)
+            activesupport (>= 3.0)
+          cocaine (0.5.8)
+            climate_control (>= 0.0.3, < 1.0)
+          concurrent-ruby (1.0.2)
+          erubis (2.7.0)
+          globalid (0.3.7)
+            activesupport (>= 4.1.0)
+          i18n (0.7.0)
+          json (1.8.3)
+          loofah (2.0.3)
+            nokogiri (>= 1.5.9)
+          mail (2.6.4)
+            mime-types (>= 1.16, < 4)
+          mime-types (3.1)
+            mime-types-data (~> 3.2015)
+          mime-types-data (3.2016.0521)
+          mimemagic (0.3.2)
+          mini_portile2 (2.1.0)
+          minitest (5.9.1)
+          nokogiri (1.6.8)
+            mini_portile2 (~> 2.1.0)
+            pkg-config (~> 1.1.7)
+          paperclip (5.1.0)
+            activemodel (>= 4.2.0)
+            activesupport (>= 4.2.0)
+            cocaine (~> 0.5.5)
+            mime-types
+            mimemagic (~> 0.3.0)
+          pkg-config (1.1.7)
+          rack (1.6.4)
+          rack-test (0.6.3)
+            rack (>= 1.0)
+          rails (4.2.7.1)
+            actionmailer (= 4.2.7.1)
+            actionpack (= 4.2.7.1)
+            actionview (= 4.2.7.1)
+            activejob (= 4.2.7.1)
+            activemodel (= 4.2.7.1)
+            activerecord (= 4.2.7.1)
+            activesupport (= 4.2.7.1)
+            bundler (>= 1.3.0, < 2.0)
+            railties (= 4.2.7.1)
+            sprockets-rails
+          rails-deprecated_sanitizer (1.0.3)
+            activesupport (>= 4.2.0.alpha)
+          rails-dom-testing (1.0.7)
+            activesupport (>= 4.2.0.beta, < 5.0)
+            nokogiri (~> 1.6.0)
+            rails-deprecated_sanitizer (>= 1.0.1)
+          rails-html-sanitizer (1.0.3)
+            loofah (~> 2.0)
+          railties (4.2.7.1)
+            actionpack (= 4.2.7.1)
+            activesupport (= 4.2.7.1)
+            rake (>= 0.8.7)
+            thor (>= 0.18.1, < 2.0)
+          rake (11.3.0)
+          sprockets (3.7.0)
+            concurrent-ruby (~> 1.0)
+            rack (> 1, < 3)
+          sprockets-rails (3.2.0)
+            actionpack (>= 4.0)
+            activesupport (>= 4.0)
+            sprockets (>= 3.0.0)
+          thor (0.19.1)
+          thread_safe (0.3.5)
+          tzinfo (1.2.2)
+            thread_safe (~> 0.1)
+
+      PLATFORMS
+        ruby
+
+      DEPENDENCIES
+        paperclip (~> 5.1.0)
+        rails (~> 4.2.7.1)
+
+      BUNDLED WITH
+         1.13.1
+    L
+
+    bundle! "lock --update paperclip"
+
+    expect(lockfile).to include(rubygems_version("paperclip", "~> 5.1.0"))
+  end
+
+  # https://github.com/bundler/bundler/issues/1500
+  it "does not fail install because of gem plugins" do
+    realworld_system_gems("open_gem --version 1.4.2", "rake --version 0.9.2")
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem 'rack', '1.0.1'
+    G
+
+    bundle "install --path vendor/bundle"
+    expect(err).not_to include("Could not find rake")
+    expect(err).to lack_errors
+  end
+
+  it "checks out git repos when the lockfile is corrupted" do
+    gemfile <<-G
+      source "https://rubygems.org"
+
+      gem 'activerecord',  :github => 'carlhuda/rails-bundler-test', :branch => 'master'
+      gem 'activesupport', :github => 'carlhuda/rails-bundler-test', :branch => 'master'
+      gem 'actionpack',    :github => 'carlhuda/rails-bundler-test', :branch => 'master'
+    G
+
+    lockfile <<-L
+      GIT
+        remote: git://github.com/carlhuda/rails-bundler-test.git
+        revision: 369e28a87419565f1940815219ea9200474589d4
+        branch: master
+        specs:
+          actionpack (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+            erubis (~> 2.7.0)
+            journey (~> 1.0.1)
+            rack (~> 1.4.0)
+            rack-cache (~> 1.2)
+            rack-test (~> 0.6.1)
+            sprockets (~> 2.1.2)
+          activemodel (3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+          activerecord (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            arel (~> 3.0.2)
+            tzinfo (~> 0.3.29)
+          activesupport (3.2.2)
+            i18n (~> 0.6)
+            multi_json (~> 1.0)
+
+      GIT
+        remote: git://github.com/carlhuda/rails-bundler-test.git
+        revision: 369e28a87419565f1940815219ea9200474589d4
+        branch: master
+        specs:
+          actionpack (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+            erubis (~> 2.7.0)
+            journey (~> 1.0.1)
+            rack (~> 1.4.0)
+            rack-cache (~> 1.2)
+            rack-test (~> 0.6.1)
+            sprockets (~> 2.1.2)
+          activemodel (3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+          activerecord (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            arel (~> 3.0.2)
+            tzinfo (~> 0.3.29)
+          activesupport (3.2.2)
+            i18n (~> 0.6)
+            multi_json (~> 1.0)
+
+      GIT
+        remote: git://github.com/carlhuda/rails-bundler-test.git
+        revision: 369e28a87419565f1940815219ea9200474589d4
+        branch: master
+        specs:
+          actionpack (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+            erubis (~> 2.7.0)
+            journey (~> 1.0.1)
+            rack (~> 1.4.0)
+            rack-cache (~> 1.2)
+            rack-test (~> 0.6.1)
+            sprockets (~> 2.1.2)
+          activemodel (3.2.2)
+            activesupport (= 3.2.2)
+            builder (~> 3.0.0)
+          activerecord (3.2.2)
+            activemodel (= 3.2.2)
+            activesupport (= 3.2.2)
+            arel (~> 3.0.2)
+            tzinfo (~> 0.3.29)
+          activesupport (3.2.2)
+            i18n (~> 0.6)
+            multi_json (~> 1.0)
+
+      GEM
+        remote: https://rubygems.org/
+        specs:
+          arel (3.0.2)
+          builder (3.0.0)
+          erubis (2.7.0)
+          hike (1.2.1)
+          i18n (0.6.0)
+          journey (1.0.3)
+          multi_json (1.1.0)
+          rack (1.4.1)
+          rack-cache (1.2)
+            rack (>= 0.4)
+          rack-test (0.6.1)
+            rack (>= 1.0)
+          sprockets (2.1.2)
+            hike (~> 1.2)
+            rack (~> 1.0)
+            tilt (~> 1.1, != 1.3.0)
+          tilt (1.3.3)
+          tzinfo (0.3.32)
+
+      PLATFORMS
+        ruby
+
+      DEPENDENCIES
+        actionpack!
+        activerecord!
+        activesupport!
+    L
+
+    bundle :lock
+    expect(err).to eq("")
+    expect(exitstatus).to eq(0) if exitstatus
+  end
+
+  it "outputs a helpful error message when gems have invalid gemspecs" do
+    install_gemfile <<-G, :standalone => true
+      source 'https://rubygems.org'
+      gem "resque-scheduler", "2.2.0"
+    G
+    expect(out).to include("You have one or more invalid gemspecs that need to be fixed.")
+    expect(out).to include("resque-scheduler 2.2.0 has an invalid gemspec")
+  end
+end
diff --git a/spec/bundler/realworld/gemfile_source_header_spec.rb b/spec/bundler/realworld/gemfile_source_header_spec.rb
new file mode 100644
index 0000000000..ba888d43bd
--- /dev/null
+++ b/spec/bundler/realworld/gemfile_source_header_spec.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+require "spec_helper"
+require "thread"
+
+RSpec.describe "fetching dependencies with a mirrored source", :realworld => true, :rubygems => ">= 2.0" do
+  let(:mirror) { "https://server.example.org" }
+  let(:original) { "http://127.0.0.1:#{@port}" }
+
+  before do
+    setup_server
+    bundle "config --local mirror.#{mirror} #{original}"
+  end
+
+  after do
+    Artifice.deactivate
+    @t.kill
+    @t.join
+  end
+
+  it "sets the 'X-Gemfile-Source' header and bundles successfully" do
+    gemfile <<-G
+      source "#{mirror}"
+      gem 'weakling'
+    G
+
+    bundle :install
+
+    expect(out).to include("Installing weakling")
+    expect(out).to include("Bundle complete")
+    expect(the_bundle).to include_gems "weakling 0.0.3"
+  end
+
+  private
+
+  def setup_server
+    require_rack
+    @port = find_unused_port
+    @server_uri = "http://127.0.0.1:#{@port}"
+
+    require File.expand_path("../../support/artifice/endpoint_mirror_source", __FILE__)
+
+    @t = Thread.new do
+      Rack::Server.start(:app       => EndpointMirrorSource,
+                         :Host      => "0.0.0.0",
+                         :Port      => @port,
+                         :server    => "webrick",
+                         :AccessLog => [],
+                         :Logger    => Spec::SilentLogger.new)
+    end.run
+
+    wait_for_server("127.0.0.1", @port)
+  end
+end
diff --git a/spec/bundler/realworld/mirror_probe_spec.rb b/spec/bundler/realworld/mirror_probe_spec.rb
new file mode 100644
index 0000000000..93dca0c173
--- /dev/null
+++ b/spec/bundler/realworld/mirror_probe_spec.rb
@@ -0,0 +1,143 @@
+# frozen_string_literal: true
+require "spec_helper"
+require "thread"
+
+RSpec.describe "fetching dependencies with a not available mirror", :realworld => true do
+  let(:mirror) { @mirror_uri }
+  let(:original) { @server_uri }
+  let(:server_port) { @server_port }
+  let(:host) { "127.0.0.1" }
+
+  before do
+    require_rack
+    setup_server
+    setup_mirror
+  end
+
+  after do
+    Artifice.deactivate
+    @server_thread.kill
+    @server_thread.join
+  end
+
+  context "with a specific fallback timeout" do
+    before do
+      global_config("BUNDLE_MIRROR__HTTP://127__0__0__1:#{server_port}/__FALLBACK_TIMEOUT/" => "true",
+                    "BUNDLE_MIRROR__HTTP://127__0__0__1:#{server_port}/" => mirror)
+    end
+
+    it "install a gem using the original uri when the mirror is not responding" do
+      gemfile <<-G
+        source "#{original}"
+        gem 'weakling'
+      G
+
+      bundle :install
+
+      expect(out).to include("Installing weakling")
+      expect(out).to include("Bundle complete")
+      expect(the_bundle).to include_gems "weakling 0.0.3"
+    end
+  end
+
+  context "with a global fallback timeout" do
+    before do
+      global_config("BUNDLE_MIRROR__ALL__FALLBACK_TIMEOUT/" => "1",
+                    "BUNDLE_MIRROR__ALL" => mirror)
+    end
+
+    it "install a gem using the original uri when the mirror is not responding" do
+      gemfile <<-G
+        source "#{original}"
+        gem 'weakling'
+      G
+
+      bundle :install
+
+      expect(out).to include("Installing weakling")
+      expect(out).to include("Bundle complete")
+      expect(the_bundle).to include_gems "weakling 0.0.3"
+    end
+  end
+
+  context "with a specific mirror without a fallback timeout" do
+    before do
+      global_config("BUNDLE_MIRROR__HTTP://127__0__0__1:#{server_port}/" => mirror)
+    end
+
+    it "fails to install the gem with a timeout error" do
+      gemfile <<-G
+        source "#{original}"
+        gem 'weakling'
+      G
+
+      bundle :install
+
+      expect(out).to include("Fetching source index from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (2/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (3/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (4/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Could not fetch specs from #{mirror}")
+    end
+
+    it "prints each error and warning on a new line" do
+      gemfile <<-G
+        source "#{original}"
+        gem 'weakling'
+      G
+
+      bundle :install
+
+      expect(out).to eq "Fetching source index from #{mirror}/
+
+Retrying fetcher due to error (2/4): Bundler::HTTPError Could not fetch specs from #{mirror}/
+Retrying fetcher due to error (3/4): Bundler::HTTPError Could not fetch specs from #{mirror}/
+Retrying fetcher due to error (4/4): Bundler::HTTPError Could not fetch specs from #{mirror}/
+Could not fetch specs from #{mirror}/"
+    end
+  end
+
+  context "with a global mirror without a fallback timeout" do
+    before do
+      global_config("BUNDLE_MIRROR__ALL" => mirror)
+    end
+
+    it "fails to install the gem with a timeout error" do
+      gemfile <<-G
+        source "#{original}"
+        gem 'weakling'
+      G
+
+      bundle :install
+
+      expect(out).to include("Fetching source index from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (2/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (3/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Retrying fetcher due to error (4/4): Bundler::HTTPError Could not fetch specs from #{mirror}")
+      expect(out).to include("Could not fetch specs from #{mirror}")
+    end
+  end
+
+  def setup_server
+    @server_port = find_unused_port
+    @server_uri = "http://#{host}:#{@server_port}"
+
+    require File.expand_path("../../support/artifice/endpoint", __FILE__)
+
+    @server_thread = Thread.new do
+      Rack::Server.start(:app       => Endpoint,
+                         :Host      => host,
+                         :Port      => @server_port,
+                         :server    => "webrick",
+                         :AccessLog => [],
+                         :Logger    => Spec::SilentLogger.new)
+    end.run
+
+    wait_for_server(host, @server_port)
+  end
+
+  def setup_mirror
+    mirror_port = find_unused_port
+    @mirror_uri = "http://#{host}:#{mirror_port}"
+  end
+end
diff --git a/spec/bundler/realworld/parallel_spec.rb b/spec/bundler/realworld/parallel_spec.rb
new file mode 100644
index 0000000000..6950bead19
--- /dev/null
+++ b/spec/bundler/realworld/parallel_spec.rb
@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+require "spec_helper"
+
+RSpec.describe "parallel", :realworld => true, :sometimes => true do
+  it "installs" do
+    gemfile <<-G
+      source "https://rubygems.org"
+      gem 'activesupport', '~> 3.2.13'
+      gem 'faker', '~> 1.1.2'
+      gem 'i18n', '~> 0.6.0' # Because 0.7+ requires Ruby 1.9.3+
+    G
+
+    bundle :install, :jobs => 4, :env => { "DEBUG" => "1" }
+
+    if Bundler.rubygems.provides?(">= 2.1.0")
+      expect(out).to match(/[1-3]: /)
+    else
+      expect(out).to include("is not threadsafe")
+    end
+
+    bundle "show activesupport"
+    expect(out).to match(/activesupport/)
+
+    bundle "show faker"
+    expect(out).to match(/faker/)
+
+    bundle "config jobs"
+    expect(out).to match(/: "4"/)
+  end
+
+  it "updates" do
+    install_gemfile <<-G
+      source "https://rubygems.org"
+      gem 'activesupport', '3.2.12'
+      gem 'faker', '~> 1.1.2'
+    G
+
+    gemfile <<-G
+      source "https://rubygems.org"
+      gem 'activesupport', '~> 3.2.12'
+      gem 'faker', '~> 1.1.2'
+      gem 'i18n', '~> 0.6.0' # Because 0.7+ requires Ruby 1.9.3+
+    G
+
+    bundle :update, :jobs => 4, :env => { "DEBUG" => "1" }
+
+    if Bundler.rubygems.provides?(">= 2.1.0")
+      expect(out).to match(/[1-3]: /)
+    else
+      expect(out).to include("is not threadsafe")
+    end
+
+    bundle "show activesupport"
+    expect(out).to match(/activesupport-3\.2\.\d+/)
+
+    bundle "show faker"
+    expect(out).to match(/faker/)
+
+    bundle "config jobs"
+    expect(out).to match(/: "4"/)
+  end
+
+  it "works with --standalone" do
+    gemfile <<-G, :standalone => true
+      source "https://rubygems.org"
+      gem "diff-lcs"
+    G
+
+    bundle :install, :standalone => true, :jobs => 4
+
+    ruby <<-RUBY, :no_lib => true
+      $:.unshift File.expand_path("bundle")
+      require "bundler/setup"
+
+      require "diff/lcs"
+      puts Diff::LCS
+    RUBY
+
+    expect(out).to eq("Diff::LCS")
+  end
+end