Bug 1800079 - Count PingCentre send failures r=nanj

Differential Revision: https://phabricator.services.mozilla.com/D161851

browser/modules/PingCentre.jsm

@@ -133,6 +133,7 @@ class PingCentre {
     }
 
     return PingCentre._sendStandalonePing(endpoint, payload).catch(event => {
+      Glean.pingCentre.sendFailures.add(1);
       Cu.reportError(
         `Structured Ingestion ping failure with error: ${event.type}`
       );

browser/modules/metrics.yaml

@@ -69,3 +69,18 @@ browser.engagement:
       - metrics
     no_lint:
       - BASELINE_PING
+
+ping.centre:
+  send_failures:
+    type: counter
+    description: |
+      The number of PingCentre send failures.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1800079
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1800079
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - chutten@mozilla.com
+    expires: 115

browser/modules/test/unit/test_PingCentre.js

@@ -32,7 +32,7 @@ function _setUp() {
   sandbox.restore();
 }
 
-add_task(function setup() {
+add_setup(function setup() {
   sandbox = sinon.createSandbox();
   _setUp();
   pingCentre = new PingCentre({ topic: "test_topic" });
@@ -43,6 +43,12 @@ add_task(function setup() {
     Services.prefs.clearUserPref(PingCentreConstants.FHR_UPLOAD_ENABLED_PREF);
     Services.prefs.clearUserPref(PingCentreConstants.LOGGING_PREF);
   });
+
+  // On Android, FOG is set up through head.js
+  if (AppConstants.platform != "android") {
+    do_get_profile();
+    Services.fog.initializeFOG();
+  }
 });
 
 add_task(function test_enabled() {
@@ -141,3 +147,12 @@ add_task(function test_sendStructuredIngestionPing_success() {
 
   Assert.equal(PingCentre._sendStandalonePing.callCount, 1, "Should be sent");
 });
+
+add_task(async function test_sendStructuredIngestionPing_failure() {
+  _setUp();
+  sandbox.stub(PingCentre, "_sendStandalonePing").rejects();
+  Assert.equal(undefined, Glean.pingCentre.sendFailures.testGetValue());
+  await pingCentre.sendStructuredIngestionPing(FAKE_PING, FAKE_ENDPOINT);
+
+  Assert.equal(1, Glean.pingCentre.sendFailures.testGetValue());
+});