Add CI with 3.3 on Windows

.github/workflows/test.yml

@@ -7,16 +7,18 @@ jobs:
     if: ${{ startsWith(github.repository, 'ruby/') || github.event_name != 'schedule' }}
     uses: ruby/actions/.github/workflows/ruby_versions.yml@master
     with:
-      engine: cruby-truffleruby
-      min_version: 2.6
+      engine: cruby
+      min_version: 3.3
 
   build:
     needs: ruby-versions
     name: build (${{ matrix.ruby }} / ${{ matrix.os }})
     strategy:
       matrix:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
-        os: [ ubuntu-latest, macos-latest ]
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        exclude:
+        - { os: windows-latest, ruby: head }
         include:
         - { os: windows-latest, ruby: mingw }
         - { os: windows-latest, ruby: mswin }
@@ -35,7 +37,7 @@ jobs:
         rubygems: ${{ matrix.ruby < '2.7' && '3.4.22' || '' }}
         bundler-cache: true
     - name: Run test
-      run: bundle exec rake compile test
+      run: ruby -I ./bundlelib -S bundle exec rake compile test
     - id: fetch
       run: |
         : Fetch deeper for changelogs

bundlelib/etc.rb

@@ -0,0 +1,7 @@
+require 'rbconfig'
+sysconfdir = RbConfig::CONFIG["sysconfdir"]
+if sysconfdir.empty? and sysconfdir = ENV["ProgramData"]
+  RbConfig::CONFIG["sysconfdir"] = sysconfdir
+end
+$:.remove(__dir__)
+raise LoadError, "Do not load etc"