Smoke test viz preview after deploy

Author: adewale

.github/workflows/preview-viz.yml

@@ -48,6 +48,23 @@ jobs:
             --name viz \
             --message "${{ github.sha }}" \
             --json
+      - name: Smoke test deployed Preview
+        run: |
+          set -euo pipefail
+          base="https://viz-pythonbyexample.adewale-883.workers.dev"
+          for path in \
+            "/" \
+            "/examples/values" \
+            "/prototyping/journey-figures-gestalt"; do
+            url="${base}${path}"
+            echo "Checking ${url}"
+            curl --fail --show-error --silent --location --output /tmp/preview-smoke.html --write-out "%{http_code} %{url_effective}\n" "${url}"
+            if grep -qiE "error code: 1101|PythonError|Traceback" /tmp/preview-smoke.html; then
+              echo "Preview rendered an exception for ${url}"
+              head -200 /tmp/preview-smoke.html
+              exit 1
+            fi
+          done
       - name: Dump wrangler logs on failure
         if: failure()
         run: |