Add GitHub Action for RSpec on JRuby

Author: biow0lf

.github/workflows/jruby.yml

@@ -0,0 +1,37 @@
+name: RSpec on JRuby
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  schedule:
+    - cron: "0 21 * * 6"
+
+env:
+  JRUBY_OPTS: "--debug"
+
+jobs:
+  rspec:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["jruby-9.4", "jruby-head"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - run: rm -f Gemfile.lock
+      - run: rm -f .ruby-version
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          rubygems: latest
+          bundler: latest
+          bundler-cache: true
+
+      - run: bundle exec rspec