[in_app_purchase_platform_interface] Added additional fields to ProductDetails (#3826)

Author: mvanbeusekom

packages/in_app_purchase/in_app_purchase_platform_interface/lib/src/types/product_details.dart

@@ -10,6 +10,8 @@ class ProductDetails {
     required this.title,
     required this.description,
     required this.price,
+    required this.rawPrice,
+    required this.currencyCode,
   });
 
   /// The identifier of the product.
@@ -31,4 +33,13 @@ class ProductDetails {
   ///
   /// For example, on iOS it is specified in App Store Connect; on Android, it is specified in Google Play Console.
   final String price;
+
+  /// The unformatted price of the product, specified in the App Store Connect or Sku in Google Play console based on the platform.
+  /// The currency unit for this value can be found in the [currencyCode] property.
+  /// The value always describes full units of the currency. (e.g. 2.45 in the case of $2.45)
+  final double rawPrice;
+
+  /// The currency code for the price of the product.
+  /// Based on the price specified in the App Store Connect or Sku in Google Play console based on the platform.
+  final String currencyCode;
 }

packages/in_app_purchase/in_app_purchase_platform_interface/test/src/types/product_details_test.dart

@@ -0,0 +1,28 @@
+// Copyright 2013 The Flutter 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 'package:flutter_test/flutter_test.dart';
+import 'package:in_app_purchase_platform_interface/in_app_purchase_platform_interface.dart';
+
+void main() {
+  group('Constructor Tests', () {
+    test(
+        'fromSkProduct should correctly parse data from a SKProductWrapper instance.',
+        () {
+      final ProductDetails productDetails = ProductDetails(
+          id: 'id',
+          title: 'title',
+          description: 'description',
+          price: '13.37',
+          currencyCode: 'USD',
+          rawPrice: 13.37);
+
+      expect(productDetails.id, 'id');
+      expect(productDetails.title, 'title');
+      expect(productDetails.description, 'description');
+      expect(productDetails.rawPrice, 13.37);
+      expect(productDetails.currencyCode, 'USD');
+    });
+  });
+}