[Payment Request] Makes sure only complete credit cards can be selected

ios/chrome/browser/ui/payments/payment_request_mediator_unittest.mm

 // 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.
 
 #import "ios/chrome/browser/ui/payments/payment_request_mediator.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 35 matching lines @@
 using ::payment_request_util::GetShippingAddressLabelFromAutofillProfile;
 }  // namespace
 
 class PaymentRequestMediatorTest : public PlatformTest {
  protected:
   PaymentRequestMediatorTest()
       : autofill_profile_(autofill::test::GetFullProfile()),
         credit_card_(autofill::test::GetCreditCard()) {
     // Add testing profile and credit card to autofill::TestPersonalDataManager.
     personal_data_manager_.AddTestingProfile(&autofill_profile_);
+    credit_card_.set_billing_address_id(autofill_profile_.guid());
     personal_data_manager_.AddTestingCreditCard(&credit_card_);
 
     payment_request_ = base::MakeUnique<TestPaymentRequest>(
         payment_request_test_util::CreateTestWebPaymentRequest(),
         &personal_data_manager_);
 
     TestChromeBrowserState::Builder test_cbs_builder;
     test_cbs_builder.AddTestingFactory(ios::SigninManagerFactory::GetInstance(),
                                        &ios::BuildFakeSigninManager);
     chrome_browser_state_ = test_cbs_builder.Build();
     mediator_ = [[PaymentRequestMediator alloc]
         initWithBrowserState:chrome_browser_state_.get()
               paymentRequest:payment_request_.get()];
   }
 
   PaymentRequestMediator* GetPaymentRequestMediator() { return mediator_; }
 
   web::TestWebThreadBundle thread_bundle_;
 
   autofill::AutofillProfile autofill_profile_;
   autofill::CreditCard credit_card_;
   autofill::TestPersonalDataManager personal_data_manager_;
   std::unique_ptr<TestPaymentRequest> payment_request_;
   std::unique_ptr<TestChromeBrowserState> chrome_browser_state_;
   PaymentRequestMediator* mediator_;
 };
 
 // Tests whether payment can be completed when expected.
 TEST_F(PaymentRequestMediatorTest, TestCanPay) {
+  EXPECT_TRUE(payment_request_->selected_credit_card());
+  EXPECT_TRUE(payment_request_->selected_shipping_profile());
+  EXPECT_TRUE(payment_request_->selected_shipping_option());
+  EXPECT_TRUE(payment_request_->selected_contact_profile());
+  EXPECT_TRUE([GetPaymentRequestMediator() canPay]);
+
   // Payment cannot be completed if there is no selected credit card.
-  EXPECT_TRUE([GetPaymentRequestMediator() canPay]);
   autofill::CreditCard* selected_credit_card =
       payment_request_->selected_credit_card();
   payment_request_->set_selected_credit_card(nullptr);
   EXPECT_FALSE([GetPaymentRequestMediator() canPay]);
 
   // Restore the selected credit card.
   payment_request_->set_selected_credit_card(selected_credit_card);
   EXPECT_TRUE([GetPaymentRequestMediator() canPay]);
 
   // Payment cannot be completed if there is no selected shipping profile,
@@ skipping 340 matching lines @@
   // Fake a signed in user.
   signin_manager->SetAuthenticatedAccountInfo("12345", "username@example.com");
 
   item = [GetPaymentRequestMediator() footerItem];
   footer_item = base::mac::ObjCCastStrict<CollectionViewFooterItem>(item);
   EXPECT_TRUE([footer_item.text
       isEqualToString:l10n_util::GetNSStringF(
                           IDS_PAYMENTS_CARD_AND_ADDRESS_SETTINGS_SIGNED_IN,
                           base::ASCIIToUTF16("username@example.com"))]);
 }