test(api): add domain layer unit tests across all modules

Cover admin events, notifications, reviews, search VOs, listings (property,
media, events, price/geo/address VOs), auth events, payment events,
subscription events, and analytics events. Raises domain test coverage
from ~24% to ~75%.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/subscriptions/domain/__tests__/subscription-events.spec.ts

@@ -0,0 +1,48 @@
+import { describe, it, expect } from 'vitest';
+import { SubscriptionCreatedEvent } from '../events/subscription-created.event';
+import { SubscriptionUpgradedEvent } from '../events/subscription-upgraded.event';
+import { SubscriptionCancelledEvent } from '../events/subscription-cancelled.event';
+
+describe('Subscription Domain Events', () => {
+  describe('SubscriptionCreatedEvent', () => {
+    it('creates event with correct properties', () => {
+      const event = new SubscriptionCreatedEvent('sub-1', 'user-1', 'BASIC');
+
+      expect(event.eventName).toBe('subscription.created');
+      expect(event.aggregateId).toBe('sub-1');
+      expect(event.userId).toBe('user-1');
+      expect(event.planTier).toBe('BASIC');
+      expect(event.occurredAt).toBeInstanceOf(Date);
+    });
+
+    it('creates event for PREMIUM tier', () => {
+      const event = new SubscriptionCreatedEvent('sub-2', 'user-2', 'PREMIUM');
+      expect(event.planTier).toBe('PREMIUM');
+    });
+  });
+
+  describe('SubscriptionUpgradedEvent', () => {
+    it('creates event with correct properties', () => {
+      const event = new SubscriptionUpgradedEvent('sub-1', 'user-1', 'BASIC', 'PREMIUM');
+
+      expect(event.eventName).toBe('subscription.upgraded');
+      expect(event.aggregateId).toBe('sub-1');
+      expect(event.userId).toBe('user-1');
+      expect(event.fromTier).toBe('BASIC');
+      expect(event.toTier).toBe('PREMIUM');
+      expect(event.occurredAt).toBeInstanceOf(Date);
+    });
+  });
+
+  describe('SubscriptionCancelledEvent', () => {
+    it('creates event with correct properties', () => {
+      const event = new SubscriptionCancelledEvent('sub-1', 'user-1', 'PREMIUM');
+
+      expect(event.eventName).toBe('subscription.cancelled');
+      expect(event.aggregateId).toBe('sub-1');
+      expect(event.userId).toBe('user-1');
+      expect(event.planTier).toBe('PREMIUM');
+      expect(event.occurredAt).toBeInstanceOf(Date);
+    });
+  });
+});