feat: implement project development module, transfer management features, and industrial AVM model integration

apps/api/src/modules/listings/domain/__tests__/listing.entity.spec.ts

@@ -142,6 +142,33 @@ describe('ListingEntity', () => {
       const fields = listing.updateContent({});
       expect(fields).toEqual([]);
     });
+
+    it('should emit ListingPriceChangedEvent when price actually changes', () => {
+      const listing = makeDefaultListing();
+      listing.clearDomainEvents();
+
+      listing.updateContent({ priceVND: 6_000_000_000n, areaM2: 100 });
+
+      const events = listing.domainEvents;
+      const priceEvent = events.find((e) => e.eventName === 'listing.price_changed');
+      expect(priceEvent).toBeDefined();
+      expect((priceEvent as { oldPrice: bigint; newPrice: bigint }).oldPrice).toBe(
+        5_000_000_000n,
+      );
+      expect((priceEvent as { oldPrice: bigint; newPrice: bigint }).newPrice).toBe(
+        6_000_000_000n,
+      );
+    });
+
+    it('should NOT emit ListingPriceChangedEvent when price stays the same', () => {
+      const listing = makeDefaultListing();
+      listing.clearDomainEvents();
+
+      listing.updateContent({ priceVND: 5_000_000_000n, areaM2: 100 });
+
+      const events = listing.domainEvents;
+      expect(events.some((e) => e.eventName === 'listing.price_changed')).toBe(false);
+    });
   });
 
   describe('markEditedForReModeration', () => {