explicitly confirm grafana dashboard was created

the test script was previously doing a basic HTTP check on the grafana
port to determine that it was alive. this upgrades that test to
explicitly confirm that not only is grafana alive, but that the CNPG
dashboard was created successfully.

Author: ardentperf

test-1-setup.sh

@@ -79,14 +79,14 @@ for region in eu us; do
   [ "${CONTAINER_METRICS}" -ge 1 ] && \
     pass "${region}: Container metrics available (${CONTAINER_METRICS})" || fail "${region}: Container metrics missing"
 
-  # Test Grafana HTTP
+  # Test Grafana dashboard
   GPORT=3000; [ "$region" = "us" ] && GPORT=3001
   kubectl port-forward -n grafana service/grafana-service ${GPORT}:3000 --context "${CTX}" &
   sleep 3
 
-  GSTATUS=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:${GPORT}/login || echo "000")
-  [ "${GSTATUS}" = "200" ] && \
-    pass "${region}: Grafana HTTP" || fail "${region}: Grafana HTTP failed"
+  DASHBOARD_COUNT=$(curl -s -u admin:admin "http://localhost:${GPORT}/api/search?query=cloudnativepg" | jq 'length' 2>/dev/null || echo "0")
+  [ "${DASHBOARD_COUNT}" -ge 1 ] && \
+    pass "${region}: CloudNativePG dashboard exists" || fail "${region}: CloudNativePG dashboard missing"
 done
 
 cleanup