Enforce capability spec renderer <--> browser

content/browser/mojo/merge_dictionary_unittest.cc

+// Copyright 2016 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 "base/memory/ptr_util.h"
+#include "content/browser/mojo/merge_dictionary.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+
+using MergeDictionaryTest = testing::Test;
+
+TEST(MergeDictionaryTest, Merge) {
+  // |source| & |target| have three properties, "string", "list" and
+  // "dictionary", which are then merged.
+  base::DictionaryValue target;
+  target.SetString("string", "Hello, ");
+  std::unique_ptr<base::DictionaryValue> dict_value_original(
+      base::MakeUnique<base::DictionaryValue>());
+  dict_value_original->SetString("key1", "original");
+  dict_value_original->SetString("key3", "original");
+  target.Set("dictionary", std::move(dict_value_original));
+  std::unique_ptr<base::ListValue> list(base::MakeUnique<base::ListValue>());
+  list->AppendString("A");
+  list->AppendString("B");
+  target.Set("list", std::move(list));
+
+  base::DictionaryValue source;
+  source.SetString("string", "World!");
+  std::unique_ptr<base::DictionaryValue> dict_value_replacement(
+      base::MakeUnique<base::DictionaryValue>());
+  dict_value_replacement->SetString("key1", "new");
+  dict_value_replacement->SetString("key2", "new");
+  source.Set("dictionary", std::move(dict_value_replacement));
+  list = base::MakeUnique<base::ListValue>();
+  list->AppendString("C");
+  source.Set("list", std::move(list));
+
+  MergeDictionary(&target, &source);
+
+  // Simple string value should have been clobbered.
+  std::string out_string;
+  EXPECT_TRUE(target.GetString("string", &out_string));
+  EXPECT_EQ(out_string, "World!");
+
+  // Dictionary should have been merged, with key1 being clobbered, key2 added
+  // and key3 preserved.
+  base::DictionaryValue* out_dictionary = nullptr;
+  EXPECT_TRUE(target.GetDictionary("dictionary", &out_dictionary));
+  EXPECT_EQ(3u, out_dictionary->size());
+  std::string value1, value2, value3;
+  EXPECT_TRUE(out_dictionary->GetString("key1", &value1));
+  EXPECT_TRUE(out_dictionary->GetString("key2", &value2));
+  EXPECT_TRUE(out_dictionary->GetString("key3", &value3));
+  EXPECT_EQ(value1, "new");
+  EXPECT_EQ(value2, "new");
+  EXPECT_EQ(value3, "original");
+
+  // List should have been merged, with the items from source appended to the
+  // items from target.
+  base::ListValue* out_list = nullptr;
+  EXPECT_TRUE(target.GetList("list", &out_list));
+  EXPECT_EQ(3u, out_list->GetSize());
+  std::string a, b, c;
+  EXPECT_TRUE(out_list->GetString(0, &a));
+  EXPECT_TRUE(out_list->GetString(1, &b));
+  EXPECT_TRUE(out_list->GetString(2, &c));
+  EXPECT_EQ("A", a);
+  EXPECT_EQ("B", b);
+  EXPECT_EQ("C", c);
+}
+
+}  // namespace content