Added unit-test

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

@@ -0,0 +1,29 @@
+// 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');
+    });
+  });
+}