[rubygems/rubygems] Don't write outside of destdir when regenerating plugins

https://github.com/rubygems/rubygems/commit/141ef4cb9a

1 files changed, 15 insertions, 0 deletions

diff --git a/test/rubygems/test_gem_commands_setup_command.rb b/test/rubygems/test_gem_commands_setup_command.rb
index 08f94d52bf..5cf94a1dc9 100644
--- a/test/rubygems/test_gem_commands_setup_command.rb
+++ b/test/rubygems/test_gem_commands_setup_command.rb
@@ -156,6 +156,21 @@ class TestGemCommandsSetupCommand < Gem::TestCase
     assert_match %r{\A#!\s*#{bin_env}#{ruby_exec}}, File.read(gem_bin_path)
   end
 
+  def test_destdir_flag_does_not_try_to_write_to_the_default_gem_home
+    FileUtils.chmod "-w", File.join(@gemhome, "plugins")
+
+    destdir = File.join(@tempdir, 'foo')
+
+    @cmd.options[:destdir] = destdir
+    @cmd.execute
+
+    spec = Gem::Specification.load("bundler/bundler.gemspec")
+
+    spec.executables.each do |e|
+      assert_path_exist File.join destdir, @gemhome.gsub(/^[a-zA-Z]:/, ''), 'gems', spec.full_name, spec.bindir, e
+    end
+  end
+
   def test_files_in
     assert_equal %w[rubygems.rb rubygems/requirement.rb rubygems/ssl_certs/rubygems.org/foo.pem],
                  @cmd.files_in('lib').sort