PaymentHandler: Implement PaymentRequestEvent constructor.

third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js

Index: third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js b/third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js
index addfad8ac606ffb16adc6fd3d316b541d428235c..986c07e5a4de222409caa4611a5411d33b5b6997 100644
--- a/third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js
+++ b/third_party/WebKit/LayoutTests/http/tests/payments/resources/payment-request-event.js
@@ -12,3 +12,46 @@ test(() => {
   assert_own_property(PaymentRequestEvent.prototype, 'instrumentKey');
   assert_own_property(PaymentRequestEvent.prototype, 'respondWith');
 });
+
+promise_test(() => {
+  return new Promise(resolve => {
+    var eventWithInit = new PaymentRequestEvent('paymentrequest', {
+      topLevelOrigin: 'https://example.com',
+      paymentRequestOrigin: 'https://example.com',
+      paymentRequestId: 'payment-request-id',
+      methodData: [{
+        supportedMethods: ['basic-card']
+      }],
+      total: {
+        label: 'Total',
+        amount: {
+          currency: 'USD',
+          value: '55.00'
+        }
+      },
+      modifiers: [{
+        supportedMethods: ['basic-card']
+      }],
+      instrumentKey: 'payment-instrument-key'
+    });
+
+    self.addEventListener('paymentrequest', e => {
+      assert_equals(e.topLevelOrigin, 'https://example.com');
+      assert_equals(e.paymentRequestOrigin, 'https://example.com');
+      assert_equals(e.paymentRequestId, 'payment-request-id');
+      assert_equals(e.methodData.length, 1);
+      assert_equals(e.methodData[0].supportedMethods.length, 1);
+      assert_equals(e.methodData[0].supportedMethods[0], 'basic-card');
+      assert_equals(e.total.label, 'Total');
+      assert_equals(e.total.amount.currency, 'USD');
+      assert_equals(e.total.amount.value, '55.00');
+      assert_equals(e.modifiers.length, 1);
+      assert_equals(e.modifiers[0].supportedMethods.length, 1);
+      assert_equals(e.modifiers[0].supportedMethods[0], 'basic-card');
+      assert_equals(e.instrumentKey, 'payment-instrument-key');
+      resolve();
+    });
+
+    self.dispatchEvent(eventWithInit);
+  });
+});