refactor: publish mileage metric catalog

src/shared/analytics/catalog.test.ts

@@ -0,0 +1,27 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  METRIC_CATALOG,
+  isMetricDomain,
+  listMetricDefinitions,
+} from './catalog.js';
+
+test('metric ids are unique and namespaced by domain', () => {
+  const ids = METRIC_CATALOG.map(metric => metric.id);
+
+  assert.equal(new Set(ids).size, ids.length);
+  assert.ok(METRIC_CATALOG.every(metric => metric.id.startsWith(`${metric.domain}.`)));
+});
+
+test('lists mileage metrics without exposing the catalog array', () => {
+  const metrics = listMetricDefinitions('mileage');
+
+  assert.ok(metrics.length >= 5);
+  assert.notEqual(metrics, METRIC_CATALOG);
+  assert.ok(metrics.every(metric => metric.domain === 'mileage'));
+});
+
+test('validates only published metric domains', () => {
+  assert.equal(isMetricDomain('mileage'), true);
+  assert.equal(isMetricDomain('unknown'), false);
+});