* lib/rubygems: Update to RubyGems 2.4.1 master(713ab65)

Complete history at:
  https://github.com/rubygems/rubygems/blob/master/History.txt#L3-L216
* test/rubygems:  ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_commands_open_command.rb

@@ -0,0 +1,46 @@
+require 'rubygems/test_case'
+require 'rubygems/commands/open_command'
+
+class TestGemCommandsOpenCommand < Gem::TestCase
+
+  def setup
+    super
+
+    @cmd = Gem::Commands::OpenCommand.new
+  end
+
+  def gem name
+    spec = quick_gem name do |gem|
+      gem.files = %W[lib/#{name}.rb Rakefile]
+    end
+    write_file File.join(*%W[gems #{spec.full_name} lib #{name}.rb])
+    write_file File.join(*%W[gems #{spec.full_name} Rakefile])
+  end
+
+  def test_execute
+    @cmd.options[:args] = %w[foo]
+    @cmd.options[:editor] = "#{Gem.ruby} -e0 --"
+
+    gem 'foo'
+
+    use_ui @ui do
+      @cmd.execute
+    end
+
+    assert_equal "", @ui.error
+  end
+
+  def test_execute_bad_gem
+    @cmd.options[:args] = %w[foo]
+
+    assert_raises Gem::MockGemUi::TermError do
+      use_ui @ui do
+        @cmd.execute
+      end
+    end
+
+    assert_match %r|Unable to find gem 'foo'|, @ui.output
+    assert_equal "", @ui.error
+  end
+
+end