invoke the metric scope

Author: masl2

lambdas/authorizer/src/__tests__/index.test.ts

@@ -18,12 +18,13 @@ jest.mock("aws-embedded-metrics", () => {
 
   return {
     metricScope: jest.fn(
-      (handler: (metrics: typeof metricsMock) => unknown): void => {
-        const wrapped = handler(metricsMock);
-        if (typeof wrapped === "function") {
-          wrapped();
-        }
-      },
+      (handler) =>
+        async () => {
+          const wrapped = handler(metricsMock);
+          if (typeof wrapped === "function") {
+            await wrapped();
+          }
+        },
     ),
     __metricsMock: metricsMock,
   };

lambdas/authorizer/src/authorizer.ts

@@ -120,12 +120,12 @@ async function checkCertificateExpiry(
   const expiry = getCertificateExpiryInDays(certificate);
 
   if (expiry <= deps.env.CLIENT_CERTIFICATE_EXPIRATION_ALERT_DAYS) {
-    metricScope((metrics: MetricsLogger) => async () => {
+    await metricScope((metrics: MetricsLogger) => async () => {
       deps.logger.warn(`APIM Certificated expiry in ${expiry} days`);
       metrics.setNamespace(
-        process.env.AWS_LAMBDA_FUNCTION_NAME || "authorizer",
+      process.env.AWS_LAMBDA_FUNCTION_NAME || "authorizer",
       );
       metrics.putMetric("apim-client-certificate-near-expiry", expiry, "Count");
-    });
+    })();
   }
 }