[Payment Request] Refactors the remaining selector view controllers

ios/chrome/browser/payments/shipping_option_selection_view_controller_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/payments/shipping_option_selection_view_controller.h"
-
-#include "base/mac/foundation_util.h"
-#include "base/memory/ptr_util.h"
-#include "base/strings/utf_string_conversions.h"
-#include "components/autofill/core/browser/test_personal_data_manager.h"
-#include "components/strings/grit/components_strings.h"
-#import "ios/chrome/browser/payments/cells/payments_text_item.h"
-#include "ios/chrome/browser/payments/payment_request.h"
-#import "ios/chrome/browser/payments/payment_request_test_util.h"
-#import "ios/chrome/browser/ui/autofill/cells/status_item.h"
-#import "ios/chrome/browser/ui/collection_view/collection_view_controller_test.h"
-#include "ios/web/public/payments/payment_request.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-class PaymentRequestShippingOptionSelectionViewControllerTest
-    : public CollectionViewControllerTest {
- protected:
-  CollectionViewController* InstantiateController() override {
-    payment_request_ = base::MakeUnique<PaymentRequest>(
-        payment_request_test_util::CreateTestWebPaymentRequest(),
-        &personal_data_manager_);
-
-    return [[ShippingOptionSelectionViewController alloc]
-        initWithPaymentRequest:payment_request_.get()];
-  }
-
-  ShippingOptionSelectionViewController*
-  GetShippingOptionSelectionViewController() {
-    return base::mac::ObjCCastStrict<ShippingOptionSelectionViewController>(
-        controller());
-  }
-
-  autofill::TestPersonalDataManager personal_data_manager_;
-  std::unique_ptr<PaymentRequest> payment_request_;
-};
-
-// Tests that the correct number of items are displayed after loading the model
-// and that the correct item appears to be selected.
-TEST_F(PaymentRequestShippingOptionSelectionViewControllerTest, TestModel) {
-  CreateController();
-  CheckController();
-  CheckTitleWithId(IDS_PAYMENTS_SHIPPING_OPTION_LABEL);
-
-  [GetShippingOptionSelectionViewController() loadModel];
-
-  ASSERT_EQ(1, NumberOfSections());
-  // One item for each of shipping options.
-  ASSERT_EQ(2U, static_cast<unsigned int>(NumberOfItemsInSection(0)));
-
-  // The next two items should be of type PaymentsTextItem. The first one
-  // should appear to be selected.
-  id item = GetCollectionViewItem(0, 0);
-  EXPECT_TRUE([item isMemberOfClass:[PaymentsTextItem class]]);
-  PaymentsTextItem* text_item = item;
-  EXPECT_EQ(MDCCollectionViewCellAccessoryCheckmark, text_item.accessoryType);
-
-  item = GetCollectionViewItem(0, 1);
-  EXPECT_TRUE([item isMemberOfClass:[PaymentsTextItem class]]);
-  text_item = item;
-  EXPECT_EQ(MDCCollectionViewCellAccessoryNone, text_item.accessoryType);
-
-  // Test the error state.
-  [GetShippingOptionSelectionViewController() setErrorMessage:@"Lorem ipsum"];
-  [GetShippingOptionSelectionViewController() loadModel];
-
-  ASSERT_EQ(1, NumberOfSections());
-  // There should be 3 items now in total.
-  ASSERT_EQ(3U, static_cast<unsigned int>(NumberOfItemsInSection(0)));
-
-  // The first item should also be of type TextAndMessageItem.
-  item = GetCollectionViewItem(0, 0);
-  EXPECT_TRUE([item isMemberOfClass:[PaymentsTextItem class]]);
-
-  // Test the pending state.
-  [GetShippingOptionSelectionViewController() setPending:YES];
-  [GetShippingOptionSelectionViewController() loadModel];
-
-  ASSERT_EQ(1, NumberOfSections());
-  // There should be only one item.
-  ASSERT_EQ(1U, static_cast<unsigned int>(NumberOfItemsInSection(0)));
-
-  // The item should be of type StatusItem.
-  item = GetCollectionViewItem(0, 0);
-  EXPECT_TRUE([item isMemberOfClass:[StatusItem class]]);
-}