[Payments] Support canMakePayment on Desktop

chrome/browser/ui/views/payments/payment_request_can_make_payment_browsertest.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <vector>
+
+#include "base/macros.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/ui/views/payments/payment_request_browsertest_base.h"
+#include "components/autofill/core/browser/autofill_test_utils.h"
+#include "components/autofill/core/browser/credit_card.h"
+#include "content/public/test/browser_test_utils.h"
+
+namespace payments {
+
+class PaymentRequestCanMakePaymentQueryTest
+    : public PaymentRequestBrowserTestBase {
+ protected:
+  PaymentRequestCanMakePaymentQueryTest()
+      : PaymentRequestBrowserTestBase(
+            "/payment_request_can_make_payment_query_test.html") {}
+
+  void CallCanMakePayment() {
+    ASSERT_TRUE(content::ExecuteScript(GetActiveWebContents(), "buy();"));
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PaymentRequestCanMakePaymentQueryTest);
+};
+
+// Visa is required, and user has a visa instrument.
+IN_PROC_BROWSER_TEST_F(PaymentRequestCanMakePaymentQueryTest,
+                       CanMakePayment_Supported) {
+  const autofill::CreditCard card = autofill::test::GetCreditCard();  // Visa.
+  AddCreditCard(card);
+
+  CallCanMakePayment();
+
+  ExpectBodyContains(std::vector<base::string16>{base::ASCIIToUTF16("true")});
+}
+
+// Visa is required, and user doesn't have a visa instrument.
+IN_PROC_BROWSER_TEST_F(PaymentRequestCanMakePaymentQueryTest,
+                       CanMakePayment_NotSupported) {
+  const autofill::CreditCard card = autofill::test::GetCreditCard2();  // Amex.
+  AddCreditCard(card);
+
+  CallCanMakePayment();
+
+  ExpectBodyContains(std::vector<base::string16>{base::ASCIIToUTF16("false")});
+}
+
+}  // namespace payments