update

test/favorites-cap.test.js

@@ -0,0 +1,21 @@
+'use strict';
+const assert = require('node:assert');
+const { checkAgainstCap, DEFAULT_MAX } = require('../lib/favorites-cap.js');
+
+let passed = 0;
+function check(name, fn) {
+  try { fn(); console.log('  ok -', name); passed++; }
+  catch (e) { console.error('  FAIL -', name, e.message); process.exitCode = 1; }
+}
+
+const mockDb = (n) => ({ prepare: () => ({ get: () => ({ n }) }) });
+
+check('under cap returns ok', () => {
+  assert.deepStrictEqual(checkAgainstCap(mockDb(0)), { ok: true });
+});
+
+check('at cap returns { ok: false, message }', () => {
+  const r = checkAgainstCap(mockDb(DEFAULT_MAX));
+  assert.strictEqual(r.ok, false);
+  assert.ok(r.message.includes(String(DEFAULT_MAX)));
+});