feat(event): 10th Birthday Bash

with @CuriousMagpie and @phillipthelen

test/api/unit/libs/payments/skuItem.test.js

@@ -0,0 +1,40 @@
+import {
+  canBuySkuItem,
+} from '../../../../../website/server/libs/payments/skuItem';
+import { model as User } from '../../../../../website/server/models/user';
+
+describe('payments/skuItems', () => {
+  let user;
+  let clock;
+
+  beforeEach(() => {
+    user = new User();
+    clock = null;
+  });
+  afterEach(() => {
+    if (clock !== null) clock.restore();
+  });
+
+  describe('#canBuySkuItem', () => {
+    it('returns true for random sku', () => {
+      expect(canBuySkuItem('something', user)).to.be.true;
+    });
+
+    describe('#gryphatrice', () => {
+      const sku = 'com.habitrpg.android.habitica.iap.pets.gryphatrice-jubilant';
+      it('returns true during birthday week', () => {
+        clock = sinon.useFakeTimers(new Date('2023-01-29'));
+        expect(canBuySkuItem(sku, user)).to.be.true;
+      });
+      it('returns false outside of birthday week', () => {
+        clock = sinon.useFakeTimers(new Date('2023-01-20'));
+        expect(canBuySkuItem(sku, user)).to.be.false;
+      });
+      it('returns false if user already owns it', () => {
+        clock = sinon.useFakeTimers(new Date('2023-02-01'));
+        user.items.pets['Gryphatrice-Jubilant'] = 5;
+        expect(canBuySkuItem(sku, user)).to.be.false;
+      });
+    });
+  });
+});