feat(telemetry): metrics with missing fields are warned in the logs.

packages/core/src/shared/logger/logger.ts

@@ -19,6 +19,7 @@ export type LogTopic =
     | 'stepfunctions'
     | 'unknown'
     | 'resourceCache'
+    | 'telemetry'
 
 class ErrorLog {
     constructor(

packages/core/src/shared/telemetry/util.ts

@@ -19,7 +19,7 @@ import {
 } from '../vscode/env'
 import { addTypeName } from '../utilities/typeConstructors'
 import globals, { isWeb } from '../extensionGlobals'
-import { mapMetadata } from './telemetryLogger'
+import { mapMetadata, MetadataObj } from './telemetryLogger'
 import { Result } from './telemetry.gen'
 import { MetricDatum } from './clienttelemetry'
 import { isValidationExemptMetric } from './exemptMetrics'
@@ -312,32 +312,41 @@ export async function getComputeEnvType(): Promise<EnvType> {
 
 /**
  * Validates that emitted telemetry metrics
- * 1. contain a result property and
+ * 1. contain a result property
  * 2. contain a reason propery if result = 'Failed'.
+ * 3. are not missing fields
  */
-export function validateMetricEvent(event: MetricDatum, fatal: boolean) {
+export function validateMetricEvent(event: MetricDatum, fatal: boolean, isExempt = isValidationExemptMetric) {
+    if (!isExempt(event.MetricName) && event.Metadata) {
+        const metadata = mapMetadata([])(event.Metadata)
+        validateMetadata(event.MetricName, metadata, fatal)
+    }
+}
+
+function validateMetadata(metricName: string, metadata: MetadataObj, fatal: boolean) {
     const failedStr: Result = 'Failed'
-    const telemetryRunDocsStr =
+    const preferRunSuffix =
         ' Consider using `.run()` instead of `.emit()`, which will set these properties automatically. ' +
         'See https://github.com/aws/aws-toolkit-vscode/blob/master/docs/telemetry.md#guidelines'
-
-    if (!isValidationExemptMetric(event.MetricName) && event.Metadata) {
-        const metadata = mapMetadata([])(event.Metadata)
-        let msg = 'telemetry: invalid Metric: '
-
-        if (metadata.result === undefined) {
-            msg += `"${event.MetricName}" emitted without the \`result\` property, which is always required.`
-        } else if (metadata.result === failedStr && metadata.reason === undefined) {
-            msg += `"${event.MetricName}" emitted with result=Failed but without the \`reason\` property.`
-        } else {
-            return // Validation passed.
-        }
-
-        msg += telemetryRunDocsStr
+    const msgPrefix = 'invalid Metric: '
+    const logger = getLogger('telemetry')
+    const logOrThrow = (msg: string, includeSuffix: boolean) => {
+        const fullMsg = msgPrefix + msg + (includeSuffix ? preferRunSuffix : '')
+        logger.warn(fullMsg)
         if (fatal) {
-            throw new Error(msg)
+            throw new Error('telemetry: ' + fullMsg)
         }
-        getLogger().warn(msg)
+    }
+
+    if (metadata.result === undefined) {
+        logOrThrow(`"${metricName}" emitted without the \`result\` property, which is always required.`, true)
+    } else if (metadata.result === failedStr && metadata.reason === undefined) {
+        logOrThrow(`"${metricName}" emitted with result=Failed but without the \`reason\` property.`, true)
+    }
+
+    // TODO: there are many instances in the toolkit where we emit metrics with missing fields. If those can be removed, we can configure this to throw in CI.
+    if (metadata.missingFields) {
+        logger.warn(msgPrefix + `"${metricName} emitted with missing fields: ${metadata.missingFields}`, false)
     }
 }
 

packages/core/src/test/shared/telemetry/util.test.ts

@@ -15,12 +15,15 @@ import {
     SessionId,
     telemetryClientIdEnvKey,
     TelemetryConfig,
+    validateMetricEvent,
 } from '../../../shared/telemetry/util'
 import { extensionVersion } from '../../../shared/vscode/env'
 import { FakeMemento } from '../../fakeExtensionContext'
 import { GlobalState } from '../../../shared/globalState'
 import { randomUUID } from 'crypto'
 import { isUuid } from '../../../shared/crypto'
+import { MetricDatum } from '../../../shared/telemetry/clienttelemetry'
+import { assertLogsContain } from '../../globalSetup.test'
 
 describe('TelemetryConfig', function () {
     const settingKey = 'aws.telemetry'
@@ -281,3 +284,110 @@ describe('getUserAgent', function () {
         assert.strictEqual(beforeClient, platformPair())
     })
 })
+
+describe('validateMetricEvent', function () {
+    it('does not validate exempt metrics', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'exempt_metric',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'result', Value: 'Succeeded' }],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, true, (_) => true)
+        assert.throws(() => assertLogsContain('invalid Metric', false, 'warn'))
+    })
+
+    it('passes validation for metrics with proper result property', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'valid_metric',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'result', Value: 'Succeeded' }],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, true, (_) => false)
+        assert.throws(() => assertLogsContain('invalid Metric', false, 'warn'))
+    })
+
+    it('passes validation for metrics with Failed result and reason property', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'valid_failed_metric',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [
+                { Key: 'result', Value: 'Failed' },
+                { Key: 'reason', Value: 'Something went wrong' },
+            ],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, true, (_) => false)
+    })
+
+    it('fails validation for metrics missing result property when fatal=true', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'invalid_metric_no_result',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'someOtherProperty', Value: 'value' }],
+        } as MetricDatum
+
+        assert.throws(
+            () => validateMetricEvent(metricEvent, true, (_) => false),
+            /emitted without the `result` property/
+        )
+    })
+
+    it('logs warning for metrics missing result property when fatal=false', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'invalid_metric_no_result',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'someOtherProperty', Value: 'value' }],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, false, (_) => false)
+        assertLogsContain('invalid Metric', false, 'warn')
+    })
+
+    it('fails validation for metrics with Failed result but missing reason property when fatal=true', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'invalid_metric_failed_no_reason',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'result', Value: 'Failed' }],
+        } as MetricDatum
+
+        assert.throws(
+            () => validateMetricEvent(metricEvent, true),
+            /emitted with result=Failed but without the `reason` property/
+        )
+    })
+
+    it('logs warning for metrics with Failed result but missing reason property when fatal=false', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'invalid_metric_failed_no_reason',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [{ Key: 'result', Value: 'Failed' }],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, false)
+        assertLogsContain('invalid Metric', false, 'warn')
+    })
+
+    it('does not fail validation for metrics with missing fields with fatal=true', function () {
+        const metricEvent: MetricDatum = {
+            MetricName: 'invalid_metric_missing_fields',
+            Value: 1,
+            Unit: 'None',
+            Metadata: [
+                { Key: 'result', Value: 'Succeeded' },
+                { Key: 'missingFields', Value: 'field1,field2' },
+            ],
+        } as MetricDatum
+
+        validateMetricEvent(metricEvent, false)
+        assertLogsContain('invalid Metric', false, 'warn')
+    })
+})