test: save timestamp in unix format

Author: ljagiela

packages/e2e-tests/package.json

@@ -10,7 +10,7 @@
     "allure:generate": "yarn allure generate -c ./reports/allure/results -o ./reports/allure/report",
     "allure:open": "allure open ./reports/allure/report/",
     "build": "yarn exec echo 'No build required'",
-    "cleanup": "rm -rf logs node_modules reports screenshots",
+    "cleanup": "rm -rf logs node_modules reports screenshots metrics",
     "lint": "run -T eslint -c .eslintrc.cjs .",
     "lint:fix": "run -T eslint -c .eslintrc.cjs . --fix",
     "pack-chrome-extension": "node ./src/utils/packExtension.ts",

packages/e2e-tests/src/support/PidMonitor.ts

@@ -9,7 +9,7 @@ import { Logger } from './logger';
 const execAsync = promisify(exec);
 
 interface UsageData {
-  timestamp: string;
+  timestamp: number;
   cpu: number;
   memory: number;
 }
@@ -81,7 +81,7 @@ class PidMonitor {
       try {
         const stats = await pidusage(this.pid);
         this._data.push({
-          timestamp: new Date().toISOString(),
+          timestamp: Date.now(),
           cpu: stats.cpu,
           memory: stats.memory
         });

packages/e2e-tests/tools/convert_metrics_to_prometheus.sh

@@ -56,8 +56,8 @@ for file in "${FILES[@]}"; do
       cpu=$(echo "$entry" | jq -r '.cpu')
       memory=$(echo "$entry" | jq -r '.memory')
 
-      echo "e2e_cpu_seconds_total{scenario_name=\"$scenario_name\",scenario_id=\"$scenario_id\",job=\"$JOB\",instance=\"$INSTANCE\",timestamp=\"$timestamp\"} $cpu" >> "$OUTPUT_FILE"
-      echo "e2e_memory_rss_bytes{scenario_name=\"$scenario_name\",scenario_id=\"$scenario_id\",job=\"$JOB\",instance=\"$INSTANCE\",timestamp=\"$timestamp\"} $memory" >> "$OUTPUT_FILE"
+      echo "e2e_cpu_seconds_total{scenario_name=\"$scenario_name\",scenario_id=\"$scenario_id\",job=\"$JOB\",instance=\"$INSTANCE\"} $cpu $timestamp" >> "$OUTPUT_FILE"
+      echo "e2e_memory_rss_bytes{scenario_name=\"$scenario_name\",scenario_id=\"$scenario_id\",job=\"$JOB\",instance=\"$INSTANCE\"} $memory $timestamp" >> "$OUTPUT_FILE"
     done
   fi
 done