Added check for balance with respect to quantity (#9469)

test/common/ops/purchase.js

@@ -231,13 +231,30 @@ describe('shared.ops.purchase', () => {
   context('bulk purchase', () => {
     let userGemAmount = 10;
 
-    before(() => {
+    beforeEach(() => {
       user.balance = userGemAmount;
       user.stats.gp = goldPoints;
       user.purchased.plan.gemsBought = 0;
       user.purchased.plan.customerId = 'customer-id';
     });
 
+    it('errors when user does not have enough gems', (done) => {
+      user.balance = 1;
+      let type = 'eggs';
+      let key = 'TigerCub';
+
+      try {
+        purchase(user, {
+          params: {type, key},
+          quantity: 2,
+        });
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.equal(i18n.t('notEnoughGems'));
+        done();
+      }
+    });
+
     it('makes bulk purchases of gems', () => {
       let [, message] = purchase(user, {
         params: {type: 'gems', key: 'gem'},

website/common/script/ops/purchase.js

@@ -138,7 +138,7 @@ module.exports = function purchase (user, req = {}, analytics) {
     throw new NotAuthorized(i18n.t('messageNotAvailable', req.language));
   }
 
-  if (!user.balance || user.balance < price) {
+  if (!user.balance || user.balance < price * quantity) {
     throw new NotAuthorized(i18n.t('notEnoughGems', req.language));
   }