Format pricing, revenue, tax data as strings for GTM

app/assets/javascripts/google_tag_manager/index.js

@@ -8,14 +8,14 @@ const PRODUCT_INFO = {
     // eslint-disable-next-line @gitlab/require-i18n-strings
     name: 'Premium',
     id: '0002',
-    price: 228,
+    price: '228',
     variant: 'SaaS',
   },
   [SKU_ULTIMATE]: {
     // eslint-disable-next-line @gitlab/require-i18n-strings
     name: 'Ultimate',
     id: '0001',
-    price: 1188,
+    price: '1188',
     variant: 'SaaS',
   },
 };
@@ -220,8 +220,8 @@ export const trackTransaction = (transactionDetails) => {
           id: transactionId,
           affiliation: 'GitLab',
           option: paymentOption,
-          revenue,
-          tax,
+          revenue: revenue.toString(),
+          tax: tax.toString(),
         },
         products: [product],
       },

spec/frontend/google_tag_manager/index_spec.js

@@ -234,7 +234,7 @@ describe('~/google_tag_manager/index', () => {
                     category: 'DevOps',
                     id: '0002',
                     name: 'Premium',
-                    price: 228,
+                    price: '228',
                     quantity: 1,
                     variant: 'SaaS',
                   },
@@ -264,7 +264,7 @@ describe('~/google_tag_manager/index', () => {
                   category: 'DevOps',
                   id: '0001',
                   name: 'Ultimate',
-                  price: 1188,
+                  price: '1188',
                   quantity: 1,
                   variant: 'SaaS',
                 },
@@ -301,7 +301,7 @@ describe('~/google_tag_manager/index', () => {
                   category: 'DevOps',
                   id: '0001',
                   name: 'Ultimate',
-                  price: 1188,
+                  price: '1188',
                   quantity: 5,
                   variant: 'SaaS',
                 },
@@ -354,8 +354,8 @@ describe('~/google_tag_manager/index', () => {
                     id: '123',
                     affiliation: 'GitLab',
                     option: 'visa',
-                    revenue,
-                    tax: 10,
+                    revenue: revenue.toString(),
+                    tax: '10',
                   },
                   products: [
                     {
@@ -363,7 +363,7 @@ describe('~/google_tag_manager/index', () => {
                       category: 'DevOps',
                       id,
                       name,
-                      price: revenue,
+                      price: revenue.toString(),
                       quantity: 1,
                       variant: 'SaaS',
                     },