[fenix] Bug28280 - Add telemetry for form data failures

app/metrics.yaml

@@ -540,6 +540,22 @@ events:
     metadata:
       tags:
         - Sharing
+  form_data_failure:
+    type: event
+    description: |
+      Form data retrieval from a tab failed.
+    bugs:
+      - https://github.com/mozilla-mobile/fenix/issues/28280
+    data_reviews:
+      - https://github.com/mozilla-mobile/fenix/issues/28280#issuecomment-1376040252
+    notification_emails:
+      - android-probes@mozilla.com
+    data_sensitivity:
+      - technical
+    expires: 121
+    metadata:
+      tags:
+        - Sharing
 
 onboarding:
   syn_cfr_shown:

app/src/main/java/org/mozilla/fenix/telemetry/TelemetryMiddleware.kt

@@ -19,6 +19,7 @@ import mozilla.components.lib.state.Middleware
 import mozilla.components.lib.state.MiddlewareContext
 import mozilla.components.support.base.android.Clock
 import mozilla.components.support.base.log.logger.Logger
+import mozilla.telemetry.glean.private.NoExtras
 import org.mozilla.fenix.GleanMetrics.Events
 import org.mozilla.fenix.GleanMetrics.Metrics
 import org.mozilla.fenix.components.metrics.MetricController
@@ -59,6 +60,9 @@ class TelemetryMiddleware(
                 val tab = context.state.findTabOrCustomTab(action.tabId)
                 onEngineSessionKilled(context.state, tab)
             }
+            is ContentAction.CheckForFormDataExceptionAction -> {
+                Events.formDataFailure.record(NoExtras())
+            }
             else -> {
                 // no-op
             }

app/src/test/java/org/mozilla/fenix/telemetry/TelemetryMiddlewareTest.kt

@@ -350,6 +350,17 @@ class TelemetryMiddlewareTest {
         assertNull(EngineMetrics.killForegroundAge.testGetValue())
         assertEquals(600_000_000, EngineMetrics.killBackgroundAge.testGetValue()!!.sum)
     }
+
+    @Test
+    fun `GIVEN the request to check for form data WHEN it fails THEN telemetry is sent`() {
+        assertNull(Events.formDataFailure.testGetValue())
+
+        store.dispatch(
+            ContentAction.CheckForFormDataExceptionAction("1", RuntimeException("session form data request failed")),
+        ).joinBlocking()
+
+        assertNotNull(Events.formDataFailure.testGetValue())
+    }
 }
 
 internal class FakeClock : Clock.Delegate {