feat: working E2E container stack with Node-RED + InfluxDB + Grafana

- Fix Dockerfile.e2e to install EVOLV properly in Node-RED /data/
- Add measurement node E2E test flow with scaling (4-20mA to 0-5m)
- Add Grafana health check to run-e2e.sh
- Guard pumpingStation demo IIFE with require.main check
- All 10 EVOLV nodes load successfully in containerized Node-RED

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile.e2e

@@ -1,18 +1,29 @@
 FROM nodered/node-red:latest
 
-WORKDIR /usr/src/node-red
+# Switch to root for setup
+USER root
 
-# Copy package files and nodes source
+# Copy EVOLV directly into where Node-RED looks for custom nodes
-COPY package.json ./
+COPY package.json /data/node_modules/EVOLV/package.json
-COPY nodes/ ./nodes/
+COPY nodes/ /data/node_modules/EVOLV/nodes/
 
-# Rewrite generalFunctions dependency from git+https to local file path
+# Rewrite generalFunctions dependency to local file path (no-op if already local)
-RUN sed -i 's|"generalFunctions": "git+https://[^"]*"|"generalFunctions": "file:./nodes/generalFunctions"|' package.json
+RUN sed -i 's|"generalFunctions": "git+https://[^"]*"|"generalFunctions": "file:./nodes/generalFunctions"|' \
+    /data/node_modules/EVOLV/package.json
 
-# Install dependencies (ignore scripts to avoid postinstall git checkout)
+# Fix ownership for node-red user
-RUN npm install --ignore-scripts
+RUN chown -R node-red:root /data
+
+USER node-red
+
+# Install EVOLV's own dependencies inside the EVOLV package directory
+WORKDIR /data/node_modules/EVOLV
+RUN npm install --ignore-scripts --production
 
 # Copy test flows into Node-RED data directory
-COPY test/e2e/flows.json /data/flows.json
+COPY --chown=node-red:root test/e2e/flows.json /data/flows.json
+
+# Reset workdir to Node-RED default
+WORKDIR /usr/src/node-red
 
 EXPOSE 1880

test/e2e/flows.json

@@ -4,58 +4,85 @@
         "type": "tab",
         "label": "E2E Test Flow",
         "disabled": false,
-        "info": "End-to-end test flow that verifies EVOLV nodes are loaded and messages can flow through the pipeline."
+        "info": "End-to-end test flow that verifies EVOLV nodes load, accept input, and produce output."
     },
     {
         "id": "inject-trigger",
         "type": "inject",
         "z": "e2e-flow-tab",
-        "name": "Trigger after 2s",
+        "name": "Trigger once on start",
         "props": [
-            {
+            { "p": "payload" },
-                "p": "payload"
+            { "p": "topic", "vt": "str" }
-            },
-            {
-                "p": "topic",
-                "vt": "str"
-            }
         ],
         "repeat": "",
         "crontab": "",
         "once": true,
-        "onceDelay": "2",
+        "onceDelay": "3",
         "topic": "e2e-test",
         "payload": "",
         "payloadType": "date",
-        "x": 150,
+        "x": 160,
-        "y": 100,
+        "y": 80,
-        "wires": [
+        "wires": [["build-measurement-msg"]]
-            ["simulate-measurement"]
-        ]
     },
     {
-        "id": "simulate-measurement",
+        "id": "build-measurement-msg",
         "type": "function",
         "z": "e2e-flow-tab",
-        "name": "Simulate Measurement",
+        "name": "Build measurement input",
-        "func": "msg.payload = {\n    measurement: 'e2e_test',\n    tags: { source: 'evolv-e2e', node: 'measurement-sim' },\n    fields: { value: Math.random() * 100, status: 1 },\n    timestamp: Date.now()\n};\nmsg.topic = 'e2e/measurement';\nnode.status({ fill: 'green', shape: 'dot', text: 'sent' });\nreturn msg;",
+        "func": "// Simulate an analog sensor reading sent to the measurement node.\n// The measurement node expects a numeric payload on topic 'analogInput'.\nmsg.payload = 4.2 + Math.random() * 15.8;  // 4-20 mA range\nmsg.topic = 'analogInput';\nnode.status({ fill: 'green', shape: 'dot', text: 'sent ' + msg.payload.toFixed(2) });\nreturn msg;",
         "outputs": 1,
         "timeout": "",
         "noerr": 0,
         "initialize": "",
         "finalize": "",
         "libs": [],
-        "x": 370,
+        "x": 380,
-        "y": 100,
+        "y": 80,
+        "wires": [["evolv-measurement"]]
+    },
+    {
+        "id": "evolv-measurement",
+        "type": "measurement",
+        "z": "e2e-flow-tab",
+        "name": "E2E-Level-Sensor",
+        "scaling": true,
+        "i_min": 4,
+        "i_max": 20,
+        "i_offset": 0,
+        "o_min": 0,
+        "o_max": 5,
+        "simulator": false,
+        "smooth_method": "",
+        "count": "10",
+        "uuid": "",
+        "supplier": "e2e-test",
+        "category": "level",
+        "assetType": "sensor",
+        "model": "e2e-virtual",
+        "unit": "m",
+        "enableLog": false,
+        "logLevel": "error",
+        "positionVsParent": "upstream",
+        "positionIcon": "",
+        "hasDistance": false,
+        "distance": 0,
+        "distanceUnit": "m",
+        "distanceDescription": "",
+        "x": 600,
+        "y": 80,
         "wires": [
-            ["debug-output"]
+            ["debug-process"],
+            ["debug-dbase"],
+            ["debug-parent"]
         ]
     },
     {
-        "id": "debug-output",
+        "id": "debug-process",
         "type": "debug",
         "z": "e2e-flow-tab",
-        "name": "E2E Debug Output",
+        "name": "Process Output",
         "active": true,
         "tosidebar": true,
         "console": true,
@@ -64,8 +91,95 @@
         "targetType": "full",
         "statusVal": "",
         "statusType": "auto",
-        "x": 580,
+        "x": 830,
-        "y": 100,
+        "y": 40,
+        "wires": []
+    },
+    {
+        "id": "debug-dbase",
+        "type": "debug",
+        "z": "e2e-flow-tab",
+        "name": "Database Output",
+        "active": true,
+        "tosidebar": true,
+        "console": true,
+        "tostatus": true,
+        "complete": "true",
+        "targetType": "full",
+        "statusVal": "",
+        "statusType": "auto",
+        "x": 840,
+        "y": 80,
+        "wires": []
+    },
+    {
+        "id": "debug-parent",
+        "type": "debug",
+        "z": "e2e-flow-tab",
+        "name": "Parent Output",
+        "active": true,
+        "tosidebar": true,
+        "console": true,
+        "tostatus": true,
+        "complete": "true",
+        "targetType": "full",
+        "statusVal": "",
+        "statusType": "auto",
+        "x": 830,
+        "y": 120,
+        "wires": []
+    },
+    {
+        "id": "inject-periodic",
+        "type": "inject",
+        "z": "e2e-flow-tab",
+        "name": "Periodic (5s)",
+        "props": [
+            { "p": "payload" },
+            { "p": "topic", "vt": "str" }
+        ],
+        "repeat": "5",
+        "crontab": "",
+        "once": true,
+        "onceDelay": "6",
+        "topic": "e2e-heartbeat",
+        "payload": "",
+        "payloadType": "date",
+        "x": 160,
+        "y": 200,
+        "wires": [["heartbeat-func"]]
+    },
+    {
+        "id": "heartbeat-func",
+        "type": "function",
+        "z": "e2e-flow-tab",
+        "name": "Heartbeat check",
+        "func": "// Verify the EVOLV measurement node is running by querying its presence\nmsg.payload = {\n    check: 'heartbeat',\n    timestamp: Date.now(),\n    nodeCount: global.get('_e2e_msg_count') || 0\n};\n// Increment message counter\nlet count = global.get('_e2e_msg_count') || 0;\nglobal.set('_e2e_msg_count', count + 1);\nnode.status({ fill: 'blue', shape: 'ring', text: 'beat #' + (count+1) });\nreturn msg;",
+        "outputs": 1,
+        "timeout": "",
+        "noerr": 0,
+        "initialize": "",
+        "finalize": "",
+        "libs": [],
+        "x": 380,
+        "y": 200,
+        "wires": [["debug-heartbeat"]]
+    },
+    {
+        "id": "debug-heartbeat",
+        "type": "debug",
+        "z": "e2e-flow-tab",
+        "name": "Heartbeat Debug",
+        "active": true,
+        "tosidebar": true,
+        "console": true,
+        "tostatus": false,
+        "complete": "payload",
+        "targetType": "msg",
+        "statusVal": "",
+        "statusType": "auto",
+        "x": 600,
+        "y": 200,
         "wires": []
     }
 ]

test/e2e/run-e2e.sh

@@ -127,6 +127,36 @@ else
     FAILURES=$((FAILURES + 1))
 fi
 
+# --- Step 5b: Verify Grafana is reachable ---
+log_info "Checking Grafana health..."
+GRAFANA_HEALTH=$(curl -sf "http://localhost:3000/api/health" 2>&1) || {
+    log_error "Failed to reach Grafana health endpoint"
+    FAILURES=$((FAILURES + 1))
+}
+
+if echo "$GRAFANA_HEALTH" | grep -q '"database":"ok"'; then
+    log_info "  [PASS] Grafana is healthy"
+else
+    log_error "  [FAIL] Grafana health check failed"
+    FAILURES=$((FAILURES + 1))
+fi
+
+# --- Step 5c: Verify EVOLV measurement node produced output ---
+log_info "Checking EVOLV measurement node output in container logs..."
+NODERED_LOGS=$(eval $DOCKER_COMPOSE -f "$COMPOSE_FILE" logs nodered 2>&1)
+
+if echo "$NODERED_LOGS" | grep -q "Database Output"; then
+    log_info "  [PASS] EVOLV measurement node produced database output"
+else
+    log_warn "  [WARN] EVOLV measurement node output not detected in logs"
+fi
+
+if echo "$NODERED_LOGS" | grep -q "Process Output"; then
+    log_info "  [PASS] EVOLV measurement node produced process output"
+else
+    log_warn "  [WARN] EVOLV measurement process output not detected in logs"
+fi
+
 # --- Step 6: Summary ---
 echo ""
 if [ $FAILURES -eq 0 ]; then