Allows a PricingPromise to be provided to the ApplePay constructor

- Coerces the underlying pricing instance from the PricingPromise

karma.conf.js

@@ -1,5 +1,5 @@
 const {
-  BROWSER,
+  BROWSER = 'Chrome',
   VIRTUALBOX_EDGE_UUID,
   VIRTUALBOX_IE11_UUID,
   ANDROID_HOME,

lib/recurly/apple-pay.js

@@ -1,6 +1,7 @@
 import Emitter from 'component-emitter';
 import errors from './errors';
 import { Pricing } from './pricing';
+import PricingPromise from './pricing/promise';
 import { normalize } from '../util/normalize';
 import decimalize from '../util/decimalize';
 import { FIELDS } from './token';
@@ -172,18 +173,22 @@ class ApplePay extends Emitter {
 
     if ('i18n' in options) Object.assign(this.config.i18n, options.i18n);
 
-    // Listen for pricing changes to update totals and currency
-    const { pricing } = options;
-    if (pricing instanceof Pricing) {
-      this.config.pricing = pricing;
-      pricing.on('change', () => this.onPricingChange());
-      if (pricing.hasPrice) this.onPricingChange();
+    if (options.pricing instanceof PricingPromise) {
+      this.config.pricing = options.pricing.pricing;
+    } else if (options.pricing instanceof Pricing) {
+      this.config.pricing = options.pricing;
     } else if ('total' in options) {
       this.config.total = options.total;
     } else {
       return this.initError = this.error('apple-pay-config-missing', { opt: 'total' });
     }
 
+    // If pricing is provided, attach change listeners
+    if (this.config.pricing) {
+      this.config.pricing.on('change', () => this.onPricingChange());
+      if (this.config.pricing.hasPrice) this.onPricingChange();
+    }
+
     this.recurly.request.get({
       route: '/apple_pay/info',
       data: { currency: options.currency },