Set up automated test for PID controller

Author: nirmitparikh8

.github/workflows/pid_controller_automated_test.yml

@@ -0,0 +1,59 @@
+---
+name: "PID Controller Automated Test"
+
+# yamllint disable-line rule:truthy
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  pid-controller-automated-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install dependencies
+        run: |
+          sudo apt-get update && sudo apt-get install -y build-essential libssl-dev libmysqlclient-dev imagemagick libmagickwand-dev
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+      - uses: ruby/setup-ruby@0481980f17b760ef6bca5e8c55809102a0af1e5a # v1.263.0
+        with:
+          bundler-cache: true
+
+      - name: Update Graphs
+        run: |
+          bundle install
+          bundle exec rake compile
+          cd experiments
+          bundle install
+          # Improve the experiment data collection and graphing
+          sed -i 's/sleep(0.1)/sleep(0.005)/' example_with_circuit_breaker.rb
+          # Make graph larger and more visible
+          sed -i 's/Gruff::Line.new/Gruff::Line.new(1200)/' example_with_circuit_breaker.rb
+          sed -i 's/graph.line_width = 3/graph.line_width = 5/' example_with_circuit_breaker.rb
+          # Add debugging
+          sed -i 's/puts "Generating graph/puts "DEBUG: Total data points:"; puts outcomes.size; puts "Sample data:"; puts outcomes.first(3).inspect; puts "Generating graph/' example_with_circuit_breaker.rb
+          bundle exec ruby example_with_circuit_breaker.rb
+          echo "=== Generated files ==="
+          ls -la *.png
+          echo "=== File contents check ==="
+          file *.png
+
+      - name: Commit Graphs
+        run: |
+          git checkout ${{ github.head_ref }}
+          git config user.name shopify-actions
+          git config user.email [email protected]
+          git add experiments/*.png
+          if git diff --staged --quiet; then
+            echo "No changes to commit"
+          else
+            git commit -m "Update experiment graphs"
+            git push
+          fi
+

experiments/Gemfile

@@ -3,6 +3,7 @@
 source "https://rubygems.org"
 
 # Graphing library for visualization
+gemspec path: ".."
 gem "gruff", "~> 0.23"
 
 # Alternative: Use rubyplot for pure Ruby plotting (no ImageMagick dependency)