* lib/rubygems: Update to RubyGems 2.4.2.

* test/rubygems:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47748 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/rubygems/test_gem_commands_update_command.rb b/test/rubygems/test_gem_commands_update_command.rb
index 2b3bb56855..6a327068e2 100644
--- a/test/rubygems/test_gem_commands_update_command.rb
+++ b/test/rubygems/test_gem_commands_update_command.rb
@@ -485,6 +485,19 @@ class TestGemCommandsUpdateCommand < Gem::TestCase
     assert_equal expected, @cmd.options
   end
 
+  def test_update_gem_prerelease
+    spec_fetcher do |fetcher|
+      fetcher.spec 'a', '1.a'
+      fetcher.gem  'a', '1.b'
+    end
+
+    @cmd.update_gem 'a', Gem::Requirement.new('= 1.b')
+
+    refute_empty @cmd.updated
+
+    assert @cmd.installer.instance_variable_get :@prerelease
+  end
+
   def test_update_gem_unresolved_dependency
     spec_fetcher do |fetcher|
       fetcher.spec 'a', 1