Make DictionaryValue::DeepCopyWithoutEmptyChildren return a scoped_ptr

base/values_unittest.cc

 // Copyright (c) 2012 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 <limits>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 654 matching lines @@
   EXPECT_TRUE(original_list->Equals(copy_list.get()));
 }
 
 TEST(ValuesTest, RemoveEmptyChildren) {
   scoped_ptr<DictionaryValue> root(new DictionaryValue);
   // Remove empty lists and dictionaries.
   root->Set("empty_dict", make_scoped_ptr(new DictionaryValue));
   root->Set("empty_list", make_scoped_ptr(new ListValue));
   root->SetWithoutPathExpansion("a.b.c.d.e",
                                 make_scoped_ptr(new DictionaryValue));
-  root.reset(root->DeepCopyWithoutEmptyChildren());
+  root = root->DeepCopyWithoutEmptyChildren();
   EXPECT_TRUE(root->empty());
 
   // Make sure we don't prune too much.
   root->SetBoolean("bool", true);
   root->Set("empty_dict", make_scoped_ptr(new DictionaryValue));
   root->SetString("empty_string", std::string());
-  root.reset(root->DeepCopyWithoutEmptyChildren());
+  root = root->DeepCopyWithoutEmptyChildren();
   EXPECT_EQ(2U, root->size());
 
   // Should do nothing.
-  root.reset(root->DeepCopyWithoutEmptyChildren());
+  root = root->DeepCopyWithoutEmptyChildren();
   EXPECT_EQ(2U, root->size());
 
   // Nested test cases.  These should all reduce back to the bool and string
   // set above.
   {
     root->Set("a.b.c.d.e", make_scoped_ptr(new DictionaryValue));
-    root.reset(root->DeepCopyWithoutEmptyChildren());
+    root = root->DeepCopyWithoutEmptyChildren();
     EXPECT_EQ(2U, root->size());
   }
   {
     scoped_ptr<DictionaryValue> inner(new DictionaryValue);
     inner->Set("empty_dict", make_scoped_ptr(new DictionaryValue));
     inner->Set("empty_list", make_scoped_ptr(new ListValue));
     root->Set("dict_with_empty_children", inner.Pass());
-    root.reset(root->DeepCopyWithoutEmptyChildren());
+    root = root->DeepCopyWithoutEmptyChildren();
     EXPECT_EQ(2U, root->size());
   }
   {
     scoped_ptr<ListValue> inner(new ListValue);
     inner->Append(make_scoped_ptr(new DictionaryValue));
     inner->Append(make_scoped_ptr(new ListValue));
     root->Set("list_with_empty_children", inner.Pass());
-    root.reset(root->DeepCopyWithoutEmptyChildren());
+    root = root->DeepCopyWithoutEmptyChildren();
     EXPECT_EQ(2U, root->size());
   }
 
   // Nested with siblings.
   {
     scoped_ptr<ListValue> inner(new ListValue());
     inner->Append(make_scoped_ptr(new DictionaryValue));
     inner->Append(make_scoped_ptr(new ListValue));
     root->Set("list_with_empty_children", inner.Pass());
     scoped_ptr<DictionaryValue> inner2(new DictionaryValue);
     inner2->Set("empty_dict", make_scoped_ptr(new DictionaryValue));
     inner2->Set("empty_list", make_scoped_ptr(new ListValue));
     root->Set("dict_with_empty_children", inner2.Pass());
-    root.reset(root->DeepCopyWithoutEmptyChildren());
+    root = root->DeepCopyWithoutEmptyChildren();
     EXPECT_EQ(2U, root->size());
   }
 
   // Make sure nested values don't get pruned.
   {
     scoped_ptr<ListValue> inner(new ListValue);
     scoped_ptr<ListValue> inner2(new ListValue);
     inner2->Append(make_scoped_ptr(new StringValue("hello")));
     inner->Append(make_scoped_ptr(new DictionaryValue));
     inner->Append(inner2.Pass());
     root->Set("list_with_empty_children", inner.Pass());
-    root.reset(root->DeepCopyWithoutEmptyChildren());
+    root = root->DeepCopyWithoutEmptyChildren();
     EXPECT_EQ(3U, root->size());
 
     ListValue* inner_value, *inner_value2;
     EXPECT_TRUE(root->GetList("list_with_empty_children", &inner_value));
     EXPECT_EQ(1U, inner_value->GetSize());  // Dictionary was pruned.
     EXPECT_TRUE(inner_value->GetList(0, &inner_value2));
     EXPECT_EQ(1U, inner_value2->GetSize());
   }
 }
 
@@ skipping 390 matching lines @@
   EXPECT_FALSE(main_list.GetList(1, NULL));
   EXPECT_FALSE(main_list.GetList(2, NULL));
   EXPECT_FALSE(main_list.GetList(3, NULL));
   EXPECT_FALSE(main_list.GetList(4, NULL));
   EXPECT_FALSE(main_list.GetList(5, NULL));
   EXPECT_TRUE(main_list.GetList(6, NULL));
   EXPECT_FALSE(main_list.GetList(7, NULL));
 }
 
 }  // namespace base