text: // 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 "base/values.h"
  
  #include <stddef.h>
  
  #include <algorithm>
  #include <functional>
  #include <limits>
  #include <memory>
  #include <string>
  #include <type_traits>
  #include <utility>
  #include <vector>
  
  #include "base/as_const.h"
  #include "base/bits.h"
  #include "base/containers/adapters.h"
  #include "base/containers/contains.h"
  #include "base/logging.h"
  #include "base/strings/string_piece.h"
  #include "base/strings/utf_string_conversions.h"
  #include "build/build_config.h"
  #include "testing/gmock/include/gmock/gmock.h"
  #include "testing/gtest/include/gtest/gtest.h"
  
  #if BUILDFLAG(ENABLE_BASE_TRACING)
  #include "third_party/abseil-cpp/absl/types/optional.h"
  #include "third_party/perfetto/include/perfetto/test/traced_value_test_support.h"  // no-presubmit-check nogncheck
  #endif  // BUILDFLAG(ENABLE_BASE_TRACING)
  
  namespace base {
  
  // Ensure that base::Value is as small as possible, i.e. that there is
  // no wasted space after the inner value due to alignment constraints.
  // Distinguish between the 'header' that includes |type_| and and the inner
  // value that follows it, which can be a bool, int, double, string, blob, list
  // or dict.
  //
  // This test is only enabled when NDEBUG is defined. This way the test will not
  // fail in debug builds that sometimes contain larger versions of the standard
  // containers used inside base::Value.
  TEST(ValuesTest, SizeOfValue) {
    static_assert(
        std::max({alignof(size_t), alignof(bool), alignof(int),
                  alignof(Value::DoubleStorage), alignof(std::string),
                  alignof(Value::BlobStorage), alignof(Value::ListStorage),
                  alignof(Value::DictStorage)}) == alignof(Value),
        "Value does not have smallest possible alignof");
  
    static_assert(
        sizeof(size_t) +
                std::max({sizeof(bool), sizeof(int), sizeof(Value::DoubleStorage),
                          sizeof(std::string), sizeof(Value::BlobStorage),
                          sizeof(Value::ListStorage),
                          sizeof(Value::DictStorage)}) ==
            sizeof(Value),
        "Value does not have smallest possible sizeof");
  }
  
  TEST(ValuesTest, TestNothrow) {
    static_assert(std::is_nothrow_move_constructible<Value>::value,
                  "IsNothrowMoveConstructible");
    static_assert(std::is_nothrow_default_constructible<Value>::value,
                  "IsNothrowDefaultConstructible");
    static_assert(std::is_nothrow_constructible<Value, std::string&&>::value,
                  "IsNothrowMoveConstructibleFromString");
    static_assert(
        std::is_nothrow_constructible<Value, Value::BlobStorage&&>::value,
        "IsNothrowMoveConstructibleFromBlob");
    static_assert(
        std::is_nothrow_constructible<Value, Value::ListStorage&&>::value,
        "IsNothrowMoveConstructibleFromList");
    static_assert(std::is_nothrow_move_assignable<Value>::value,
                  "IsNothrowMoveAssignable");
    static_assert(
        std::is_nothrow_constructible<ListValue, Value::ListStorage&&>::value,
        "ListIsNothrowMoveConstructibleFromList");
  }
  
  TEST(ValuesTest, EmptyValue) {
    Value value;
    EXPECT_EQ(Value::Type::NONE, value.type());
    EXPECT_EQ(absl::nullopt, value.GetIfBool());
    EXPECT_EQ(absl::nullopt, value.GetIfInt());
    EXPECT_EQ(absl::nullopt, value.GetIfDouble());
    EXPECT_EQ(nullptr, value.GetIfString());
    EXPECT_EQ(nullptr, value.GetIfBlob());
  }
  
  // Group of tests for the value constructors.
  TEST(ValuesTest, ConstructBool) {
    Value true_value(true);
    EXPECT_EQ(Value::Type::BOOLEAN, true_value.type());
    EXPECT_THAT(true_value.GetIfBool(), testing::Optional(true));
    EXPECT_TRUE(true_value.GetBool());
  
    Value false_value(false);
    EXPECT_EQ(Value::Type::BOOLEAN, false_value.type());
    EXPECT_THAT(false_value.GetIfBool(), testing::Optional(false));
    EXPECT_FALSE(false_value.GetBool());
  }
  
  TEST(ValuesTest, ConstructFromPtrs) {
    static_assert(!std::is_constructible<Value, int*>::value, "");
    static_assert(!std::is_constructible<Value, const int*>::value, "");
    static_assert(!std::is_constructible<Value, wchar_t*>::value, "");
    static_assert(!std::is_constructible<Value, const wchar_t*>::value, "");
  
    static_assert(std::is_constructible<Value, char*>::value, "");
    static_assert(std::is_constructible<Value, const char*>::value, "");
    static_assert(std::is_constructible<Value, char16_t*>::value, "");
    static_assert(std::is_constructible<Value, const char16_t*>::value, "");
  }
  
  TEST(ValuesTest, ConstructInt) {
    Value value(-37);
    EXPECT_EQ(Value::Type::INTEGER, value.type());
    EXPECT_THAT(value.GetIfInt(), testing::Optional(-37));
    EXPECT_EQ(-37, value.GetInt());
  
    EXPECT_THAT(value.GetIfDouble(), testing::Optional(-37.0));
    EXPECT_EQ(-37.0, value.GetDouble());
  }
  
  TEST(ValuesTest, ConstructDouble) {
    Value value(-4.655);
    EXPECT_EQ(Value::Type::DOUBLE, value.type());
    EXPECT_THAT(value.GetIfDouble(), testing::Optional(-4.655));
    EXPECT_EQ(-4.655, value.GetDouble());
  }
  
  TEST(ValuesTest, ConstructStringFromConstCharPtr) {
    const char* str = "foobar";
    Value value(str);
    EXPECT_EQ(Value::Type::STRING, value.type());
    EXPECT_THAT(value.GetIfString(), testing::Pointee(std::string("foobar")));
    EXPECT_EQ("foobar", value.GetString());
  }
  
  TEST(ValuesTest, ConstructStringFromStringPiece) {
    std::string str = "foobar";
    Value value{StringPiece(str)};
    EXPECT_EQ(Value::Type::STRING, value.type());
    EXPECT_THAT(value.GetIfString(), testing::Pointee(std::string("foobar")));
    EXPECT_EQ("foobar", value.GetString());
  }
  
  TEST(ValuesTest, ConstructStringFromStdStringRRef) {
    std::string str = "foobar";
    Value value(std::move(str));
    EXPECT_EQ(Value::Type::STRING, value.type());
    EXPECT_THAT(value.GetIfString(), testing::Pointee(std::string("foobar")));
    EXPECT_EQ("foobar", value.GetString());
  }
  
  TEST(ValuesTest, ConstructStringFromConstChar16Ptr) {
    std::u16string str = u"foobar";
    Value value(str.c_str());
    EXPECT_EQ(Value::Type::STRING, value.type());
    EXPECT_THAT(value.GetIfString(), testing::Pointee(std::string("foobar")));
    EXPECT_EQ("foobar", value.GetString());
  }
  
  TEST(ValuesTest, ConstructStringFromStringPiece16) {
    std::u16string str = u"foobar";
    Value value{StringPiece16(str)};
    EXPECT_EQ(Value::Type::STRING, value.type());
    EXPECT_THAT(value.GetIfString(), testing::Pointee(std::string("foobar")));
    EXPECT_EQ("foobar", value.GetString());
  }
  
  TEST(ValuesTest, ConstructBinary) {
    Value::BlobStorage blob = {0xF, 0x0, 0x0, 0xB, 0xA, 0x2};
    Value value(blob);
    EXPECT_EQ(Value::Type::BINARY, value.type());
    EXPECT_THAT(value.GetIfBlob(), testing::Pointee(blob));
    EXPECT_EQ(blob, value.GetBlob());
  }
  
  TEST(ValuesTest, ConstructDict) {
    DictionaryValue value;
    EXPECT_EQ(Value::Type::DICTIONARY, value.type());
  }
  
  TEST(ValuesTest, ConstructDictFromStorage) {
    Value::DictStorage storage;
    storage.emplace("foo", "bar");
    {
      Value value(storage);
      EXPECT_EQ(Value::Type::DICTIONARY, value.type());
      EXPECT_EQ(Value::Type::STRING, value.FindKey("foo")->type());
      EXPECT_EQ("bar", value.FindKey("foo")->GetString());
    }
  
    storage["foo"] = base::Value("baz");
    {
      Value value(std::move(storage));
      EXPECT_EQ(Value::Type::DICTIONARY, value.type());
      EXPECT_EQ(Value::Type::STRING, value.FindKey("foo")->type());
      EXPECT_EQ("baz", value.FindKey("foo")->GetString());
    }
  }
  
  TEST(ValuesTest, ConstructList) {
    ListValue value;
    EXPECT_EQ(Value::Type::LIST, value.type());
  }
  
  TEST(ValuesTest, ConstructListFromStorage) {
    Value::ListStorage storage;
    storage.emplace_back("foo");
    {
      ListValue value(storage);
      EXPECT_EQ(Value::Type::LIST, value.type());
      EXPECT_EQ(1u, value.GetList().size());
      EXPECT_EQ(Value::Type::STRING, value.GetList()[0].type());
      EXPECT_EQ("foo", value.GetList()[0].GetString());
    }
  
    storage.back() = base::Value("bar");
    {
      ListValue value(std::move(storage));
      EXPECT_EQ(Value::Type::LIST, value.type());
      EXPECT_EQ(1u, value.GetList().size());
      EXPECT_EQ(Value::Type::STRING, value.GetList()[0].type());
      EXPECT_EQ("bar", value.GetList()[0].GetString());
    }
  }
  
  TEST(ValuesTest, HardenTests) {
    Value value;
    ASSERT_EQ(value.type(), Value::Type::NONE);
    EXPECT_DEATH_IF_SUPPORTED(value.GetBool(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.GetInt(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.GetDouble(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.GetString(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.GetBlob(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.DictItems(), "");
    EXPECT_DEATH_IF_SUPPORTED(value.GetList(), "");
  }
  
  // Group of tests for the copy constructors and copy-assigmnent. For equality
  // checks comparisons of the interesting fields are done instead of relying on
  // Equals being correct.
  TEST(ValuesTest, CopyBool) {
    Value true_value(true);
    Value copied_true_value(true_value.Clone());
    EXPECT_EQ(true_value.type(), copied_true_value.type());
    EXPECT_EQ(true_value.GetBool(), copied_true_value.GetBool());
  
    Value false_value(false);
    Value copied_false_value(false_value.Clone());
    EXPECT_EQ(false_value.type(), copied_false_value.type());
    EXPECT_EQ(false_value.GetBool(), copied_false_value.GetBool());
  
    Value blank;
  
    blank = true_value.Clone();
    EXPECT_EQ(true_value.type(), blank.type());
    EXPECT_EQ(true_value.GetBool(), blank.GetBool());
  
    blank = false_value.Clone();
    EXPECT_EQ(false_value.type(), blank.type());
    EXPECT_EQ(false_value.GetBool(), blank.GetBool());
  }
  
  TEST(ValuesTest, CopyInt) {
    Value value(74);
    Value copied_value(value.Clone());
    EXPECT_EQ(value.type(), copied_value.type());
    EXPECT_EQ(value.GetInt(), copied_value.GetInt());
  
    Value blank;
  
    blank = value.Clone();
    EXPECT_EQ(value.type(), blank.type());
    EXPECT_EQ(value.GetInt(), blank.GetInt());
  }
  
  TEST(ValuesTest, CopyDouble) {
    Value value(74.896);
    Value copied_value(value.Clone());
    EXPECT_EQ(value.type(), copied_value.type());
    EXPECT_EQ(value.GetDouble(), copied_value.GetDouble());
  
    Value blank;
  
    blank = value.Clone();
    EXPECT_EQ(value.type(), blank.type());
    EXPECT_EQ(value.GetDouble(), blank.GetDouble());
  }
  
  TEST(ValuesTest, CopyString) {
    Value value("foobar");
    Value copied_value(value.Clone());
    EXPECT_EQ(value.type(), copied_value.type());
    EXPECT_EQ(value.GetString(), copied_value.GetString());
  
    Value blank;
  
    blank = value.Clone();
    EXPECT_EQ(value.type(), blank.type());
    EXPECT_EQ(value.GetString(), blank.GetString());
  }
  
  TEST(ValuesTest, CopyBinary) {
    Value value(Value::BlobStorage({0xF, 0x0, 0x0, 0xB, 0xA, 0x2}));
    Value copied_value(value.Clone());
    EXPECT_EQ(value.type(), copied_value.type());
    EXPECT_EQ(value.GetBlob(), copied_value.GetBlob());
  
    Value blank;
  
    blank = value.Clone();
    EXPECT_EQ(value.type(), blank.type());
    EXPECT_EQ(value.GetBlob(), blank.GetBlob());
  }
  
  TEST(ValuesTest, CopyDictionary) {
    Value::DictStorage storage;
    storage.emplace("Int", 123);
    Value value(std::move(storage));
  
    Value copied_value(value.Clone());
    EXPECT_EQ(value, copied_value);
  
    Value blank;
    blank = value.Clone();
    EXPECT_EQ(value, blank);
  }
  
  TEST(ValuesTest, CopyList) {
    Value::ListStorage storage;
    storage.emplace_back(123);
    Value value(std::move(storage));
  
    Value copied_value(value.Clone());
    EXPECT_EQ(value, copied_value);
  
    Value blank;
    blank = value.Clone();
    EXPECT_EQ(value, blank);
  }
  
  // Group of tests for the move constructors and move-assigmnent.
  TEST(ValuesTest, MoveBool) {
    Value true_value(true);
    Value moved_true_value(std::move(true_value));
    EXPECT_EQ(Value::Type::BOOLEAN, moved_true_value.type());
    EXPECT_TRUE(moved_true_value.GetBool());
  
    Value false_value(false);
    Value moved_false_value(std::move(false_value));
    EXPECT_EQ(Value::Type::BOOLEAN, moved_false_value.type());
    EXPECT_FALSE(moved_false_value.GetBool());
  
    Value blank;
  
    blank = Value(true);
    EXPECT_EQ(Value::Type::BOOLEAN, blank.type());
    EXPECT_TRUE(blank.GetBool());
  
    blank = Value(false);
    EXPECT_EQ(Value::Type::BOOLEAN, blank.type());
    EXPECT_FALSE(blank.GetBool());
  }
  
  TEST(ValuesTest, MoveInt) {
    Value value(74);
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::INTEGER, moved_value.type());
    EXPECT_EQ(74, moved_value.GetInt());
  
    Value blank;
  
    blank = Value(47);
    EXPECT_EQ(Value::Type::INTEGER, blank.type());
    EXPECT_EQ(47, blank.GetInt());
  }
  
  TEST(ValuesTest, MoveDouble) {
    Value value(74.896);
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::DOUBLE, moved_value.type());
    EXPECT_EQ(74.896, moved_value.GetDouble());
  
    Value blank;
  
    blank = Value(654.38);
    EXPECT_EQ(Value::Type::DOUBLE, blank.type());
    EXPECT_EQ(654.38, blank.GetDouble());
  }
  
  TEST(ValuesTest, MoveString) {
    Value value("foobar");
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::STRING, moved_value.type());
    EXPECT_EQ("foobar", moved_value.GetString());
  
    Value blank;
  
    blank = Value("foobar");
    EXPECT_EQ(Value::Type::STRING, blank.type());
    EXPECT_EQ("foobar", blank.GetString());
  }
  
  TEST(ValuesTest, MoveBinary) {
    const Value::BlobStorage buffer = {0xF, 0x0, 0x0, 0xB, 0xA, 0x2};
    Value value(buffer);
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::BINARY, moved_value.type());
    EXPECT_EQ(buffer, moved_value.GetBlob());
  
    Value blank;
  
    blank = Value(buffer);
    EXPECT_EQ(Value::Type::BINARY, blank.type());
    EXPECT_EQ(buffer, blank.GetBlob());
  }
  
  TEST(ValuesTest, MoveConstructDictionary) {
    Value::DictStorage storage;
    storage.emplace("Int", 123);
  
    Value value(std::move(storage));
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::DICTIONARY, moved_value.type());
    EXPECT_EQ(123, moved_value.FindKey("Int")->GetInt());
  }
  
  TEST(ValuesTest, MoveAssignDictionary) {
    Value::DictStorage storage;
    storage.emplace("Int", 123);
  
    Value blank;
    blank = Value(std::move(storage));
    EXPECT_EQ(Value::Type::DICTIONARY, blank.type());
    EXPECT_EQ(123, blank.FindKey("Int")->GetInt());
  }
  
  TEST(ValuesTest, TakeDict) {
    // Prepare a dict with a value of each type.
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
    Value value(std::move(storage));
  
    // Take ownership of the dict and make sure its contents are what we expect.
    auto dict = value.TakeDict();
    EXPECT_EQ(8u, dict.size());
    EXPECT_TRUE(dict["null"].is_none());
    EXPECT_TRUE(dict["bool"].is_bool());
    EXPECT_TRUE(dict["int"].is_int());
    EXPECT_TRUE(dict["double"].is_double());
    EXPECT_TRUE(dict["string"].is_string());
    EXPECT_TRUE(dict["blob"].is_blob());
    EXPECT_TRUE(dict["list"].is_list());
    EXPECT_TRUE(dict["dict"].is_dict());
  
    // Validate that |value| no longer contains values.
    EXPECT_TRUE(value.DictEmpty());
  }
  
  TEST(ValuesTest, MoveList) {
    Value::ListStorage storage;
    storage.emplace_back(123);
    Value value(storage);
    Value moved_value(std::move(value));
    EXPECT_EQ(Value::Type::LIST, moved_value.type());
    EXPECT_EQ(123, moved_value.GetList().back().GetInt());
  
    Value blank;
    blank = Value(std::move(storage));
    EXPECT_EQ(Value::Type::LIST, blank.type());
    EXPECT_EQ(123, blank.GetList().back().GetInt());
  }
  
  TEST(ValuesTest, TakeList) {
    // Prepare a list with a value of each type.
    ListValue value;
    value.Append(Value(Value::Type::NONE));
    value.Append(Value(true));
    value.Append(Value(123));
    value.Append(Value(123.456));
    value.Append(Value("string"));
    value.Append(Value(Value::Type::BINARY));
    value.Append(Value(Value::Type::LIST));
    value.Append(Value(Value::Type::DICTIONARY));
  
    // Take ownership of the list and make sure its contents are what we expect.
    auto list = value.TakeList();
    EXPECT_EQ(8u, list.size());
    EXPECT_TRUE(list[0].is_none());
    EXPECT_TRUE(list[1].is_bool());
    EXPECT_TRUE(list[2].is_int());
    EXPECT_TRUE(list[3].is_double());
    EXPECT_TRUE(list[4].is_string());
    EXPECT_TRUE(list[5].is_blob());
    EXPECT_TRUE(list[6].is_list());
    EXPECT_TRUE(list[7].is_dict());
  
    // Validate that |value| no longer contains values.
    EXPECT_TRUE(value.GetList().empty());
  }
  
  TEST(ValuesTest, Append) {
    ListValue value;
    value.Append(true);
    EXPECT_TRUE(value.GetList().back().is_bool());
  
    value.Append(123);
    EXPECT_TRUE(value.GetList().back().is_int());
  
    value.Append(3.14);
    EXPECT_TRUE(value.GetList().back().is_double());
  
    std::string str = "foo";
    value.Append(str.c_str());
    EXPECT_TRUE(value.GetList().back().is_string());
  
    value.Append(StringPiece(str));
    EXPECT_TRUE(value.GetList().back().is_string());
  
    value.Append(std::move(str));
    EXPECT_TRUE(value.GetList().back().is_string());
  
    std::u16string str16 = u"bar";
    value.Append(str16.c_str());
    EXPECT_TRUE(value.GetList().back().is_string());
  
    value.Append(base::StringPiece16(str16));
    EXPECT_TRUE(value.GetList().back().is_string());
  
    value.Append(Value());
    EXPECT_TRUE(value.GetList().back().is_none());
  
    value.Append(Value(Value::Type::DICTIONARY));
    EXPECT_TRUE(value.GetList().back().is_dict());
  
    value.Append(Value(Value::Type::LIST));
    EXPECT_TRUE(value.GetList().back().is_list());
  }
  
  TEST(ValuesTest, Insert) {
    ListValue value;
    auto GetList = [&value]() -> decltype(auto) { return value.GetList(); };
    auto GetConstList = [&value] { return as_const(value).GetList(); };
  
    auto storage_iter = value.Insert(GetList().end(), Value(true));
    EXPECT_TRUE(GetList().begin() == storage_iter);
    EXPECT_TRUE(storage_iter->is_bool());
  
    auto span_iter = value.Insert(GetConstList().begin(), Value(123));
    EXPECT_TRUE(GetConstList().begin() == span_iter);
    EXPECT_TRUE(span_iter->is_int());
  }
  
  TEST(ValuesTest, EraseListIter) {
    ListValue value;
    value.Append(1);
    value.Append(2);
    value.Append(3);
  
    EXPECT_TRUE(value.EraseListIter(value.GetList().begin() + 1));
    EXPECT_EQ(2u, value.GetList().size());
    EXPECT_EQ(1, value.GetList()[0].GetInt());
    EXPECT_EQ(3, value.GetList()[1].GetInt());
  
    EXPECT_TRUE(value.EraseListIter(value.GetList().begin()));
    EXPECT_EQ(1u, value.GetList().size());
    EXPECT_EQ(3, value.GetList()[0].GetInt());
  
    EXPECT_TRUE(value.EraseListIter(value.GetList().begin()));
    EXPECT_TRUE(value.GetList().empty());
  
    EXPECT_FALSE(value.EraseListIter(value.GetList().begin()));
  }
  
  TEST(ValuesTest, EraseListValue) {
    ListValue value;
    value.Append(1);
    value.Append(2);
    value.Append(2);
    value.Append(3);
  
    EXPECT_EQ(2u, value.EraseListValue(Value(2)));
    EXPECT_EQ(2u, value.GetList().size());
    EXPECT_EQ(1, value.GetList()[0].GetInt());
    EXPECT_EQ(3, value.GetList()[1].GetInt());
  
    EXPECT_EQ(1u, value.EraseListValue(Value(1)));
    EXPECT_EQ(1u, value.GetList().size());
    EXPECT_EQ(3, value.GetList()[0].GetInt());
  
    EXPECT_EQ(1u, value.EraseListValue(Value(3)));
    EXPECT_TRUE(value.GetList().empty());
  
    EXPECT_EQ(0u, value.EraseListValue(Value(3)));
  }
  
  TEST(ValuesTest, EraseListValueIf) {
    ListValue value;
    value.Append(1);
    value.Append(2);
    value.Append(2);
    value.Append(3);
  
    EXPECT_EQ(3u, value.EraseListValueIf(
                      [](const auto& val) { return val >= Value(2); }));
    EXPECT_EQ(1u, value.GetList().size());
    EXPECT_EQ(1, value.GetList()[0].GetInt());
  
    EXPECT_EQ(1u, value.EraseListValueIf([](const auto& val) { return true; }));
    EXPECT_TRUE(value.GetList().empty());
  
    EXPECT_EQ(0u, value.EraseListValueIf([](const auto& val) { return true; }));
  }
  
  TEST(ValuesTest, ClearList) {
    ListValue value;
    value.Append(1);
    value.Append(2);
    value.Append(3);
    EXPECT_EQ(3u, value.GetList().size());
  
    value.ClearList();
    EXPECT_TRUE(value.GetList().empty());
  
    // ClearList() should be idempotent.
    value.ClearList();
    EXPECT_TRUE(value.GetList().empty());
  }
  
  TEST(ValuesTest, FindKey) {
    Value::DictStorage storage;
    storage.emplace("foo", "bar");
    Value dict(std::move(storage));
    EXPECT_NE(nullptr, dict.FindKey("foo"));
    EXPECT_EQ(nullptr, dict.FindKey("baz"));
  
    // Single not found key.
    bool found = dict.FindKey("notfound");
    EXPECT_FALSE(found);
  }
  
  TEST(ValuesTest, FindKeyChangeValue) {
    Value::DictStorage storage;
    storage.emplace("foo", "bar");
    Value dict(std::move(storage));
    Value* found = dict.FindKey("foo");
    EXPECT_NE(nullptr, found);
    EXPECT_EQ("bar", found->GetString());
  
    *found = Value(123);
    EXPECT_EQ(123, dict.FindKey("foo")->GetInt());
  }
  
  TEST(ValuesTest, FindKeyConst) {
    Value::DictStorage storage;
    storage.emplace("foo", "bar");
    const Value dict(std::move(storage));
    EXPECT_NE(nullptr, dict.FindKey("foo"));
    EXPECT_EQ(nullptr, dict.FindKey("baz"));
  }
  
  TEST(ValuesTest, FindKeyOfType) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    Value dict(std::move(storage));
    EXPECT_NE(nullptr, dict.FindKeyOfType("null", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::NONE));
    EXPECT_NE(nullptr, dict.FindKeyOfType("bool", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::BOOLEAN));
    EXPECT_NE(nullptr, dict.FindKeyOfType("int", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::INTEGER));
    EXPECT_NE(nullptr, dict.FindKeyOfType("double", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::DOUBLE));
    EXPECT_NE(nullptr, dict.FindKeyOfType("string", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::STRING));
    EXPECT_NE(nullptr, dict.FindKeyOfType("blob", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::BINARY));
    EXPECT_NE(nullptr, dict.FindKeyOfType("list", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::LIST));
    EXPECT_NE(nullptr, dict.FindKeyOfType("dict", Value::Type::DICTIONARY));
  }
  
  TEST(ValuesTest, FindKeyOfTypeConst) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_NE(nullptr, dict.FindKeyOfType("null", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("null", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::NONE));
    EXPECT_NE(nullptr, dict.FindKeyOfType("bool", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("bool", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::BOOLEAN));
    EXPECT_NE(nullptr, dict.FindKeyOfType("int", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("int", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::INTEGER));
    EXPECT_NE(nullptr, dict.FindKeyOfType("double", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("double", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::DOUBLE));
    EXPECT_NE(nullptr, dict.FindKeyOfType("string", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("string", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::STRING));
    EXPECT_NE(nullptr, dict.FindKeyOfType("blob", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("blob", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::BINARY));
    EXPECT_NE(nullptr, dict.FindKeyOfType("list", Value::Type::LIST));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("list", Value::Type::DICTIONARY));
  
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::NONE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::BOOLEAN));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::INTEGER));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::DOUBLE));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::STRING));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::BINARY));
    EXPECT_EQ(nullptr, dict.FindKeyOfType("dict", Value::Type::LIST));
    EXPECT_NE(nullptr, dict.FindKeyOfType("dict", Value::Type::DICTIONARY));
  }
  
  TEST(ValuesTest, FindBoolKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("null"));
    EXPECT_NE(absl::nullopt, dict.FindBoolKey("bool"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("int"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("double"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("string"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("blob"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("list"));
    EXPECT_EQ(absl::nullopt, dict.FindBoolKey("dict"));
  }
  
  TEST(ValuesTest, FindIntKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("null"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("bool"));
    EXPECT_NE(absl::nullopt, dict.FindIntKey("int"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("double"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("string"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("blob"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("list"));
    EXPECT_EQ(absl::nullopt, dict.FindIntKey("dict"));
  }
  
  TEST(ValuesTest, FindDoubleKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("null"));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("bool"));
    EXPECT_NE(absl::nullopt, dict.FindDoubleKey("int"));
    EXPECT_NE(absl::nullopt, dict.FindDoubleKey("double"));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("string"));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("blob"));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("list"));
    EXPECT_EQ(absl::nullopt, dict.FindDoubleKey("dict"));
  }
  
  TEST(ValuesTest, FindStringKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(nullptr, dict.FindStringKey("null"));
    EXPECT_EQ(nullptr, dict.FindStringKey("bool"));
    EXPECT_EQ(nullptr, dict.FindStringKey("int"));
    EXPECT_EQ(nullptr, dict.FindStringKey("double"));
    EXPECT_NE(nullptr, dict.FindStringKey("string"));
    EXPECT_EQ(nullptr, dict.FindStringKey("blob"));
    EXPECT_EQ(nullptr, dict.FindStringKey("list"));
    EXPECT_EQ(nullptr, dict.FindStringKey("dict"));
  }
  
  TEST(ValuesTest, MutableFindStringKey) {
    Value::DictStorage storage;
    storage.emplace("string", "foo");
    Value dict(std::move(storage));
  
    *(dict.FindStringKey("string")) = "bar";
  
    Value::DictStorage expected_storage;
    expected_storage.emplace("string", "bar");
    Value expected_dict(std::move(expected_storage));
  
    EXPECT_EQ(expected_dict, dict);
  }
  
  TEST(ValuesTest, FindDictKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(nullptr, dict.FindDictKey("null"));
    EXPECT_EQ(nullptr, dict.FindDictKey("bool"));
    EXPECT_EQ(nullptr, dict.FindDictKey("int"));
    EXPECT_EQ(nullptr, dict.FindDictKey("double"));
    EXPECT_EQ(nullptr, dict.FindDictKey("string"));
    EXPECT_EQ(nullptr, dict.FindDictKey("blob"));
    EXPECT_EQ(nullptr, dict.FindDictKey("list"));
    EXPECT_NE(nullptr, dict.FindDictKey("dict"));
  }
  
  TEST(ValuesTest, FindListKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(nullptr, dict.FindListKey("null"));
    EXPECT_EQ(nullptr, dict.FindListKey("bool"));
    EXPECT_EQ(nullptr, dict.FindListKey("int"));
    EXPECT_EQ(nullptr, dict.FindListKey("double"));
    EXPECT_EQ(nullptr, dict.FindListKey("string"));
    EXPECT_EQ(nullptr, dict.FindListKey("blob"));
    EXPECT_NE(nullptr, dict.FindListKey("list"));
    EXPECT_EQ(nullptr, dict.FindListKey("dict"));
  }
  
  TEST(ValuesTest, FindBlobKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    const Value dict(std::move(storage));
    EXPECT_EQ(nullptr, dict.FindBlobKey("null"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("bool"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("int"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("double"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("string"));
    EXPECT_NE(nullptr, dict.FindBlobKey("blob"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("list"));
    EXPECT_EQ(nullptr, dict.FindBlobKey("dict"));
  }
  
  TEST(ValuesTest, SetKey) {
    Value::DictStorage storage;
    storage.emplace("null", Value::Type::NONE);
    storage.emplace("bool", Value::Type::BOOLEAN);
    storage.emplace("int", Value::Type::INTEGER);
    storage.emplace("double", Value::Type::DOUBLE);
    storage.emplace("string", Value::Type::STRING);
    storage.emplace("blob", Value::Type::BINARY);
    storage.emplace("list", Value::Type::LIST);
    storage.emplace("dict", Value::Type::DICTIONARY);
  
    Value dict(Value::Type::DICTIONARY);
    dict.SetKey(StringPiece("null"), Value(Value::Type::NONE));
    dict.SetKey(StringPiece("bool"), Value(Value::Type::BOOLEAN));
    dict.SetKey(std::string("int"), Value(Value::Type::INTEGER));
    dict.SetKey(std::string("double"), Value(Value::Type::DOUBLE));
    dict.SetKey(std::string("string"), Value(Value::Type::STRING));
    dict.SetKey("blob", Value(Value::Type::BINARY));
    dict.SetKey("list", Value(Value::Type::LIST));
    dict.SetKey("dict", Value(Value::Type::DICTIONARY));
  
    EXPECT_EQ(Value(std::move(storage)), dict);
  }
  
  TEST(ValuesTest, SetBoolKey) {
    absl::optional<bool> value;
  
    DictionaryValue dict;
    dict.SetBoolKey("true_key", true);
    dict.SetBoolKey("false_key", false);
  
    value = dict.FindBoolKey("true_key");
    ASSERT_TRUE(value);
    ASSERT_TRUE(*value);
  
    value = dict.FindBoolKey("false_key");
    ASSERT_TRUE(value);
    ASSERT_FALSE(*value);
  
    value = dict.FindBoolKey("missing_key");
    ASSERT_FALSE(value);
  }
  
  TEST(ValuesTest, SetIntKey) {
    absl::optional<int> value;
  
    DictionaryValue dict;
    dict.SetIntKey("one_key", 1);
    dict.SetIntKey("minus_one_key", -1);
  
    value = dict.FindIntKey("one_key");
    ASSERT_TRUE(value);
    ASSERT_EQ(1, *value);
  
    value = dict.FindIntKey("minus_one_key");
    ASSERT_TRUE(value);
    ASSERT_EQ(-1, *value);
  
    value = dict.FindIntKey("missing_key");
    ASSERT_FALSE(value);
  }
  
  TEST(ValuesTest, SetDoubleKey) {
    DictionaryValue dict;
    dict.SetDoubleKey("one_key", 1.0);
    dict.SetDoubleKey("minus_one_key", -1.0);
    dict.SetDoubleKey("pi_key", 3.1415);
  
    // NOTE: Use FindKey() instead of FindDoubleKey() because the latter will
    // auto-convert integers to doubles as well.
    const Value* value;
  
    value = dict.FindKey("one_key");
    ASSERT_TRUE(value);
    EXPECT_TRUE(value->is_double());
    EXPECT_EQ(1.0, value->GetDouble());
  
    value = dict.FindKey("minus_one_key");
    ASSERT_TRUE(value);
    EXPECT_TRUE(value->is_double());
    EXPECT_EQ(-1.0, value->GetDouble());
  
    value = dict.FindKey("pi_key");
    ASSERT_TRUE(value);
    EXPECT_TRUE(value->is_double());
    EXPECT_EQ(3.1415, value->GetDouble());
  }
  
  TEST(ValuesTest, SetStringKey) {
    DictionaryValue dict;
    dict.SetStringKey("one_key", "one");
    dict.SetStringKey("hello_key", "hello world");
  
    std::string movable_value("movable_value");
    dict.SetStringKey("movable_key", std::move(movable_value));
    ASSERT_TRUE(movable_value.empty());
  
    const std::string* value;
  
    value = dict.FindStringKey("one_key");
    ASSERT_TRUE(value);
    ASSERT_EQ("one", *value);
  
    value = dict.FindStringKey("hello_key");
    ASSERT_TRUE(value);
    ASSERT_EQ("hello world", *value);
  
    value = dict.FindStringKey("movable_key");
    ASSERT_TRUE(value);
    ASSERT_EQ("movable_value", *value);
  
    value = dict.FindStringKey("missing_key");
    ASSERT_FALSE(value);
  }
  
  TEST(ValuesTest, FindPath) {
    // Construct a dictionary path {root}.foo.bar = 123
    Value foo(Value::Type::DICTIONARY);
    foo.SetKey("bar", Value(123));
  
    Value root(Value::Type::DICTIONARY);
    root.SetKey("foo", std::move(foo));
  
    // No key (stupid but well-defined and takes work to prevent).
    Value* found = root.FindPath("");
    EXPECT_EQ(&root, found);
  
    // Double key, second not found.
    found = root.FindPath("foo.notfound");
    EXPECT_FALSE(found);
  
    // Double key, found.
    found = root.FindPath("foo.bar");
    EXPECT_TRUE(found);
    EXPECT_TRUE(found->is_int());
    EXPECT_EQ(123, found->GetInt());
  }
  
  TEST(ValuesTest, SetPath) {
    Value root(Value::Type::DICTIONARY);
  
    Value* inserted = root.SetPath("one.two", Value(123));
    Value* found = root.FindPathOfType("one.two", Value::Type::INTEGER);
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    EXPECT_EQ(123, found->GetInt());
  
    inserted = root.SetPath("foo.bar", Value(123));
    found = root.FindPathOfType("foo.bar", Value::Type::INTEGER);
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    EXPECT_EQ(123, found->GetInt());
  
    // Overwrite with a different value.
    root.SetPath("foo.bar", Value("hello"));
    found = root.FindPathOfType("foo.bar", Value::Type::STRING);
    ASSERT_TRUE(found);
    EXPECT_EQ("hello", found->GetString());
  
    // Can't change existing non-dictionary keys to dictionaries.
    found = root.SetPath("foo.bar.baz", Value(123));
    EXPECT_FALSE(found);
  }
  
  TEST(ValuesTest, SetBoolPath) {
    DictionaryValue root;
    Value* inserted = root.SetBoolPath("foo.bar", true);
    Value* found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    ASSERT_TRUE(found->is_bool());
    EXPECT_TRUE(found->GetBool());
  
    // Overwrite with a different value.
    root.SetBoolPath("foo.bar", false);
    found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    ASSERT_TRUE(found->is_bool());
    EXPECT_FALSE(found->GetBool());
  
    // Can't change existing non-dictionary keys.
    ASSERT_FALSE(root.SetBoolPath("foo.bar.zoo", true));
  }
  
  TEST(ValuesTest, SetIntPath) {
    DictionaryValue root;
    Value* inserted = root.SetIntPath("foo.bar", 123);
    Value* found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    ASSERT_TRUE(found->is_int());
    EXPECT_EQ(123, found->GetInt());
  
    // Overwrite with a different value.
    root.SetIntPath("foo.bar", 234);
    found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    ASSERT_TRUE(found->is_int());
    EXPECT_EQ(234, found->GetInt());
  
    // Can't change existing non-dictionary keys.
    ASSERT_FALSE(root.SetIntPath("foo.bar.zoo", 567));
  }
  
  TEST(ValuesTest, SetDoublePath) {
    DictionaryValue root;
    Value* inserted = root.SetDoublePath("foo.bar", 1.23);
    Value* found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    ASSERT_TRUE(found->is_double());
    EXPECT_EQ(1.23, found->GetDouble());
  
    // Overwrite with a different value.
    root.SetDoublePath("foo.bar", 2.34);
    found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    ASSERT_TRUE(found->is_double());
    EXPECT_EQ(2.34, found->GetDouble());
  
    // Can't change existing non-dictionary keys.
    ASSERT_FALSE(root.SetDoublePath("foo.bar.zoo", 5.67));
  }
  
  TEST(ValuesTest, SetStringPath) {
    DictionaryValue root;
    Value* inserted = root.SetStringPath("foo.bar", "hello world");
    Value* found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    EXPECT_EQ(inserted, found);
    ASSERT_TRUE(found->is_string());
    EXPECT_EQ("hello world", found->GetString());
  
    // Overwrite with a different value.
    root.SetStringPath("foo.bar", "bonjour monde");
    found = root.FindPath("foo.bar");
    ASSERT_TRUE(found);
    ASSERT_TRUE(found->is_string());
    EXPECT_EQ("bonjour monde", found->GetString());
  
    ASSERT_TRUE(root.SetStringPath("foo.bar", StringPiece("rah rah")));
    ASSERT_TRUE(root.SetStringPath("foo.bar", std::string("temp string")));
    ASSERT_TRUE(root.SetStringPath("foo.bar", u"temp string"));
  
    // Can't change existing non-dictionary keys.
    ASSERT_FALSE(root.SetStringPath("foo.bar.zoo", "ola mundo"));
  }
  
  TEST(ValuesTest, RemoveKey) {
    Value root(Value::Type::DICTIONARY);
    root.SetKey("one", Value(123));
  
    // Removal of missing key should fail.
    EXPECT_FALSE(root.RemoveKey("two"));
  
    // Removal of existing key should succeed.
    EXPECT_TRUE(root.RemoveKey("one"));
  
    // Second removal of previously existing key should fail.
    EXPECT_FALSE(root.RemoveKey("one"));
  }
  
  TEST(ValuesTest, ExtractKey) {
    Value root(Value::Type::DICTIONARY);
    root.SetKey("one", Value(123));
  
    // Extraction of missing key should fail.
    EXPECT_EQ(absl::nullopt, root.ExtractKey("two"));
  
    // Extraction of existing key should succeed.
    EXPECT_EQ(Value(123), root.ExtractKey("one"));
  
    // Second extraction of previously existing key should fail.
    EXPECT_EQ(absl::nullopt, root.ExtractKey("one"));
  }
  
  TEST(ValuesTest, RemovePath) {
    Value root(Value::Type::DICTIONARY);
    root.SetPath("one.two.three", Value(123));
  
    // Removal of missing key should fail.
    EXPECT_FALSE(root.RemovePath("one.two.four"));
  
    // Removal of existing key should succeed.
    EXPECT_TRUE(root.RemovePath("one.two.three"));
  
    // Second removal of previously existing key should fail.
    EXPECT_FALSE(root.RemovePath("one.two.three"));
  
    // Intermediate empty dictionaries should be cleared.
    EXPECT_EQ(nullptr, root.FindKey("one"));
  
    root.SetPath("one.two.three", Value(123));
    root.SetPath("one.two.four", Value(124));
  
    EXPECT_TRUE(root.RemovePath("one.two.three"));
    // Intermediate non-empty dictionaries should be kept.
    EXPECT_NE(nullptr, root.FindKey("one"));
    EXPECT_NE(nullptr, root.FindPath("one.two"));
    EXPECT_NE(nullptr, root.FindPath("one.two.four"));
  }
  
  TEST(ValuesTest, ExtractPath) {
    Value root(Value::Type::DICTIONARY);
    root.SetPath("one.two.three", Value(123));
  
    // Extraction of missing key should fail.
    EXPECT_EQ(absl::nullopt, root.ExtractPath("one.two.four"));
  
    // Extraction of existing key should succeed.
    EXPECT_EQ(Value(123), root.ExtractPath("one.two.three"));
  
    // Second extraction of previously existing key should fail.
    EXPECT_EQ(absl::nullopt, root.ExtractPath("one.two.three"));
  
    // Intermediate empty dictionaries should be cleared.
    EXPECT_EQ(nullptr, root.FindKey("one"));
  
    root.SetPath("one.two.three", Value(123));
    root.SetPath("one.two.four", Value(124));
  
    EXPECT_EQ(Value(123), root.ExtractPath("one.two.three"));
    // Intermediate non-empty dictionaries should be kept.
    EXPECT_NE(nullptr, root.FindKey("one"));
    EXPECT_NE(nullptr, root.FindPath("one.two"));
    EXPECT_NE(nullptr, root.FindPath("one.two.four"));
  }
  
  TEST(ValuesTest, Basic) {
    // Test basic dictionary getting/setting
    DictionaryValue settings;
    ASSERT_FALSE(settings.FindPath("global.homepage"));
  
    ASSERT_FALSE(settings.FindKey("global"));
    settings.SetKey("global", Value(true));
    ASSERT_TRUE(settings.FindKey("global"));
    settings.RemoveKey("global");
    settings.SetPath("global.homepage", Value("http://scurvy.com"));
    ASSERT_TRUE(settings.FindKey("global"));
    const std::string* homepage = settings.FindStringPath("global.homepage");
    ASSERT_TRUE(homepage);
    ASSERT_EQ(std::string("http://scurvy.com"), *homepage);
  
    // Test storing a dictionary in a list.
    ASSERT_FALSE(settings.FindPath("global.toolbar.bookmarks"));
  
    ListValue new_toolbar_bookmarks;
    settings.SetPath("global.toolbar.bookmarks",
                     std::move(new_toolbar_bookmarks));
    Value* toolbar_bookmarks = settings.FindListPath("global.toolbar.bookmarks");
    ASSERT_TRUE(toolbar_bookmarks);
  
    DictionaryValue new_bookmark;
    new_bookmark.SetKey("name", Value("Froogle"));
    new_bookmark.SetKey("url", Value("http://froogle.com"));
    toolbar_bookmarks->Append(std::move(new_bookmark));
  
    Value* bookmark_list = settings.FindPath("global.toolbar.bookmarks");
    ASSERT_TRUE(bookmark_list);
    ASSERT_EQ(1U, bookmark_list->GetList().size());
    Value* bookmark = &bookmark_list->GetList()[0];
    ASSERT_TRUE(bookmark);
    ASSERT_TRUE(bookmark->is_dict());
    const std::string* bookmark_name = bookmark->FindStringKey("name");
    ASSERT_TRUE(bookmark_name);
    ASSERT_EQ(std::string("Froogle"), *bookmark_name);
    const std::string* bookmark_url = bookmark->FindStringKey("url");
    ASSERT_TRUE(bookmark_url);
    ASSERT_EQ(std::string("http://froogle.com"), *bookmark_url);
  }
  
  TEST(ValuesTest, List) {
    std::unique_ptr<ListValue> mixed_list(new ListValue());
    mixed_list->Set(0, std::make_unique<Value>(true));
    mixed_list->Set(1, std::make_unique<Value>(42));
    mixed_list->Set(2, std::make_unique<Value>(88.8));
    mixed_list->Set(3, std::make_unique<Value>("foo"));
    ASSERT_EQ(4u, mixed_list->GetSize());
  
    Value* value = nullptr;
    bool bool_value = false;
    int int_value = 0;
    double double_value = 0.0;
    std::string string_value;
  
    ASSERT_FALSE(mixed_list->Get(4, &value));
  
    ASSERT_FALSE(mixed_list->GetInteger(0, &int_value));
    ASSERT_EQ(0, int_value);
    ASSERT_FALSE(mixed_list->GetBoolean(1, &bool_value));
    ASSERT_FALSE(bool_value);
    ASSERT_FALSE(mixed_list->GetString(2, &string_value));
    ASSERT_EQ("", string_value);
    ASSERT_FALSE(mixed_list->GetInteger(2, &int_value));
    ASSERT_EQ(0, int_value);
    ASSERT_FALSE(mixed_list->GetBoolean(3, &bool_value));
    ASSERT_FALSE(bool_value);
  
    ASSERT_TRUE(mixed_list->GetBoolean(0, &bool_value));
    ASSERT_TRUE(bool_value);
    ASSERT_TRUE(mixed_list->GetInteger(1, &int_value));
    ASSERT_EQ(42, int_value);
    // implicit conversion from Integer to Double should be possible.
    ASSERT_TRUE(mixed_list->GetDouble(1, &double_value));
    ASSERT_EQ(42, double_value);
    ASSERT_TRUE(mixed_list->GetDouble(2, &double_value));
    ASSERT_EQ(88.8, double_value);
    ASSERT_TRUE(mixed_list->GetString(3, &string_value));
    ASSERT_EQ("foo", string_value);
  
    // Try searching in the mixed list.
    base::Value sought_value(42);
    base::Value not_found_value(false);
  
    ASSERT_TRUE(Contains(mixed_list->GetList(), sought_value));
    ASSERT_EQ(42, int_value);
    ASSERT_FALSE(Contains(mixed_list->GetList(), not_found_value));
  }
  
  TEST(ValuesTest, BinaryValue) {
    // Default constructor creates a BinaryValue with a buffer of size 0.
    Value binary(Value::Type::BINARY);
    ASSERT_TRUE(binary.GetBlob().empty());
  
    // Test the common case of a non-empty buffer
    Value::BlobStorage buffer(15);
    uint8_t* original_buffer = buffer.data();
    binary = Value(std::move(buffer));
    ASSERT_TRUE(binary.GetBlob().data());
    ASSERT_EQ(original_buffer, binary.GetBlob().data());
    ASSERT_EQ(15U, binary.GetBlob().size());
  
    char stack_buffer[42];
    memset(stack_buffer, '!', 42);
    binary = Value(Value::BlobStorage(stack_buffer, stack_buffer + 42));
    ASSERT_TRUE(binary.GetBlob().data());
    ASSERT_NE(stack_buffer,
              reinterpret_cast<const char*>(binary.GetBlob().data()));
    ASSERT_EQ(42U, binary.GetBlob().size());
    ASSERT_EQ(0, memcmp(stack_buffer, binary.GetBlob().data(),
                        binary.GetBlob().size()));
  }
  
  TEST(ValuesTest, StringValue) {
    // Test overloaded StringValue constructor.
    std::unique_ptr<Value> narrow_value(new Value("narrow"));
    ASSERT_TRUE(narrow_value.get());
    ASSERT_TRUE(narrow_value->is_string());
    std::unique_ptr<Value> utf16_value(new Value(u"utf16"));
    ASSERT_TRUE(utf16_value.get());
    ASSERT_TRUE(utf16_value->is_string());
  
    // Test overloaded GetAsString.
    std::string narrow = "http://google.com";
    std::u16string utf16 = u"http://google.com";
    const Value* string_value = nullptr;
    ASSERT_TRUE(narrow_value->GetAsString(&narrow));
    ASSERT_TRUE(narrow_value->GetAsString(&utf16));
    ASSERT_TRUE(narrow_value->GetAsString(&string_value));
    ASSERT_EQ(std::string("narrow"), narrow);
    ASSERT_EQ(u"narrow", utf16);
    ASSERT_EQ(string_value->GetString(), narrow);
  
    ASSERT_TRUE(utf16_value->GetAsString(&narrow));
    ASSERT_TRUE(utf16_value->GetAsString(&utf16));
    ASSERT_TRUE(utf16_value->GetAsString(&string_value));
    ASSERT_EQ(std::string("utf16"), narrow);
    ASSERT_EQ(u"utf16", utf16);
    ASSERT_EQ(string_value->GetString(), narrow);
  
    // Don't choke on NULL values.
    ASSERT_TRUE(narrow_value->GetAsString(static_cast<std::u16string*>(nullptr)));
    ASSERT_TRUE(narrow_value->GetAsString(static_cast<std::string*>(nullptr)));
    ASSERT_TRUE(narrow_value->GetAsString(static_cast<const Value**>(nullptr)));
  }
  
  TEST(ValuesTest, ListDeletion) {
    ListValue list;
    list.Append(std::make_unique<Value>());
    EXPECT_FALSE(list.empty());
    list.Clear();
    EXPECT_TRUE(list.empty());
  }
  
  TEST(ValuesTest, ListRemoval) {
    std::unique_ptr<Value> removed_item;
  
    {
      ListValue list;
      list.Append(std::make_unique<Value>());
      EXPECT_EQ(1U, list.GetSize());
      EXPECT_FALSE(
          list.Remove(std::numeric_limits<size_t>::max(), &removed_item));
      EXPECT_FALSE(list.Remove(1, &removed_item));
      EXPECT_TRUE(list.Remove(0, &removed_item));
      ASSERT_TRUE(removed_item);
      EXPECT_EQ(0U, list.GetSize());
    }
    removed_item.reset();
  
    {
      ListValue list;
      list.Append(std::make_unique<Value>());
      EXPECT_TRUE(list.Remove(0, nullptr));
      EXPECT_EQ(0U, list.GetSize());
    }
  
    {
      ListValue list;
      auto value = std::make_unique<Value>();
      Value original_value = value->Clone();
      list.Append(std::move(value));
      size_t index = 0;
      list.Remove(original_value, &index);
      EXPECT_EQ(0U, index);
      EXPECT_EQ(0U, list.GetSize());
    }
  }
  
  TEST(ValuesTest, DictionaryDeletion) {
    std::string key = "test";
    DictionaryValue dict;
    dict.Set(key, std::make_unique<Value>());
    EXPECT_FALSE(dict.DictEmpty());
    EXPECT_FALSE(dict.DictEmpty());
    EXPECT_EQ(1U, dict.DictSize());
    dict.DictClear();
    EXPECT_TRUE(dict.DictEmpty());
    EXPECT_TRUE(dict.DictEmpty());
    EXPECT_EQ(0U, dict.DictSize());
  }
  
  TEST(ValuesTest, DictionarySetReturnsPointer) {
    {
      DictionaryValue dict;
      Value* blank_ptr = dict.Set("foo.bar", std::make_unique<base::Value>());
      EXPECT_EQ(Value::Type::NONE, blank_ptr->type());
    }
  
    {
      DictionaryValue dict;
      Value* blank_ptr = dict.SetKey("foo.bar", base::Value());
      EXPECT_EQ(Value::Type::NONE, blank_ptr->type());
    }
  
    {
      DictionaryValue dict;
      Value* int_ptr = dict.SetInteger("foo.bar", 42);
      EXPECT_EQ(Value::Type::INTEGER, int_ptr->type());
      EXPECT_EQ(42, int_ptr->GetInt());
    }
  
    {
      DictionaryValue dict;
      Value* double_ptr = dict.SetDouble("foo.bar", 3.142);
      EXPECT_EQ(Value::Type::DOUBLE, double_ptr->type());
      EXPECT_EQ(3.142, double_ptr->GetDouble());
    }
  
    {
      DictionaryValue dict;
      Value* string_ptr = dict.SetString("foo.bar", "foo");
      EXPECT_EQ(Value::Type::STRING, string_ptr->type());
      EXPECT_EQ("foo", string_ptr->GetString());
    }
  
    {
      DictionaryValue dict;
      Value* string16_ptr = dict.SetString("foo.bar", u"baz");
      EXPECT_EQ(Value::Type::STRING, string16_ptr->type());
      EXPECT_EQ("baz", string16_ptr->GetString());
    }
  
    {
      DictionaryValue dict;
      DictionaryValue* dict_ptr = dict.SetDictionary(
          "foo.bar", std::make_unique<base::DictionaryValue>());
      EXPECT_EQ(Value::Type::DICTIONARY, dict_ptr->type());
    }
  
    {
      DictionaryValue dict;
      ListValue* list_ptr =
          dict.SetList("foo.bar", std::make_unique<base::ListValue>());
      EXPECT_EQ(Value::Type::LIST, list_ptr->type());
    }
  }
  
  TEST(ValuesTest, DictionaryRemoval) {
    std::string key = "test";
    std::unique_ptr<Value> removed_item;
  
    {
      DictionaryValue dict;
      EXPECT_EQ(0U, dict.DictSize());
      EXPECT_TRUE(dict.DictEmpty());
      dict.Set(key, std::make_unique<Value>());
      EXPECT_TRUE(dict.HasKey(key));
      EXPECT_FALSE(dict.Remove("absent key", &removed_item));
      EXPECT_EQ(1U, dict.DictSize());
      EXPECT_FALSE(dict.DictEmpty());
  
      EXPECT_TRUE(dict.Remove(key, &removed_item));
      EXPECT_FALSE(dict.HasKey(key));
      ASSERT_TRUE(removed_item);
      EXPECT_EQ(0U, dict.DictSize());
      EXPECT_TRUE(dict.DictEmpty());
    }
  
    {
      DictionaryValue dict;
      dict.Set(key, std::make_unique<Value>());
      EXPECT_TRUE(dict.HasKey(key));
      EXPECT_TRUE(dict.Remove(key, nullptr));
      EXPECT_FALSE(dict.HasKey(key));
    }
  }
  
  TEST(ValuesTest, DictionaryWithoutPathExpansion) {
    DictionaryValue dict;
    dict.Set("this.is.expanded", std::make_unique<Value>());
    dict.SetKey("this.isnt.expanded", Value());
  
    EXPECT_FALSE(dict.HasKey("this.is.expanded"));
    EXPECT_TRUE(dict.HasKey("this"));
    Value* value1;
    EXPECT_TRUE(dict.Get("this", &value1));
    DictionaryValue* value2;
    ASSERT_TRUE(dict.GetDictionaryWithoutPathExpansion("this", &value2));
    EXPECT_EQ(value1, value2);
    EXPECT_EQ(1U, value2->DictSize());
  
    EXPECT_TRUE(dict.HasKey("this.isnt.expanded"));
    Value* value3;
    EXPECT_FALSE(dict.Get("this.isnt.expanded", &value3));
    Value* value4 = dict.FindKey("this.isnt.expanded");
    ASSERT_TRUE(value4);
    EXPECT_EQ(Value::Type::NONE, value4->type());
  }
  
  // Tests the deprecated version of SetWithoutPathExpansion.
  // TODO(estade): remove.
  TEST(ValuesTest, DictionaryWithoutPathExpansionDeprecated) {
    DictionaryValue dict;
    dict.Set("this.is.expanded", std::make_unique<Value>());
    dict.SetWithoutPathExpansion("this.isnt.expanded", std::make_unique<Value>());
  
    EXPECT_FALSE(dict.HasKey("this.is.expanded"));
    EXPECT_TRUE(dict.HasKey("this"));
    Value* value1;
    EXPECT_TRUE(dict.Get("this", &value1));
    DictionaryValue* value2;
    ASSERT_TRUE(dict.GetDictionaryWithoutPathExpansion("this", &value2));
    EXPECT_EQ(value1, value2);
    EXPECT_EQ(1U, value2->DictSize());
  
    EXPECT_TRUE(dict.HasKey("this.isnt.expanded"));
    Value* value3;
    EXPECT_FALSE(dict.Get("this.isnt.expanded", &value3));
    Value* value4 = dict.FindKey("this.isnt.expanded");
    ASSERT_TRUE(value4);
    EXPECT_EQ(Value::Type::NONE, value4->type());
  }
  
  TEST(ValuesTest, DictionaryRemovePath) {
    DictionaryValue dict;
    dict.SetInteger("a.long.way.down", 1);
    dict.SetBoolean("a.long.key.path", true);
  
    std::unique_ptr<Value> removed_item;
    EXPECT_TRUE(dict.RemovePath("a.long.way.down", &removed_item));
    ASSERT_TRUE(removed_item);
    EXPECT_TRUE(removed_item->is_int());
    EXPECT_FALSE(dict.HasKey("a.long.way.down"));
    EXPECT_FALSE(dict.HasKey("a.long.way"));
    EXPECT_TRUE(dict.Get("a.long.key.path", nullptr));
  
    removed_item.reset();
    EXPECT_FALSE(dict.RemovePath("a.long.way.down", &removed_item));
    EXPECT_FALSE(removed_item);
    EXPECT_TRUE(dict.Get("a.long.key.path", nullptr));
  
    removed_item.reset();
    EXPECT_TRUE(dict.RemovePath("a.long.key.path", &removed_item));
    ASSERT_TRUE(removed_item);
    EXPECT_TRUE(removed_item->is_bool());
    EXPECT_TRUE(dict.DictEmpty());
  }
  
  TEST(ValuesTest, DeepCopy) {
    DictionaryValue original_dict;
    Value* null_weak = original_dict.Set("null", std::make_unique<Value>());
    Value* bool_weak = original_dict.Set("bool", std::make_unique<Value>(true));
    Value* int_weak = original_dict.Set("int", std::make_unique<Value>(42));
    Value* double_weak =
        original_dict.Set("double", std::make_unique<Value>(3.14));
    Value* string_weak =
        original_dict.Set("string", std::make_unique<Value>("hello"));
    Value* string16_weak =
        original_dict.Set("string16", std::make_unique<Value>(u"hello16"));
  
    Value* binary_weak = original_dict.Set(
        "binary", std::make_unique<Value>(Value::BlobStorage(42, '!')));
  
    Value::ListStorage storage;
    storage.emplace_back(0);
    storage.emplace_back(1);
    Value* list_weak =
        original_dict.Set("list", std::make_unique<Value>(std::move(storage)));
    Value* list_element_0_weak = &list_weak->GetList()[0];
    Value* list_element_1_weak = &list_weak->GetList()[1];
  
    DictionaryValue* dict_weak = original_dict.SetDictionary(
        "dictionary", std::make_unique<DictionaryValue>());
    dict_weak->SetStringKey("key", "value");
  
    auto copy_dict = original_dict.CreateDeepCopy();
    ASSERT_TRUE(copy_dict.get());
    ASSERT_NE(copy_dict.get(), &original_dict);
  
    Value* copy_null = nullptr;
    ASSERT_TRUE(copy_dict->Get("null", &copy_null));
    ASSERT_TRUE(copy_null);
    ASSERT_NE(copy_null, null_weak);
    ASSERT_TRUE(copy_null->is_none());
  
    Value* copy_bool = nullptr;
    ASSERT_TRUE(copy_dict->Get("bool", &copy_bool));
    ASSERT_TRUE(copy_bool);
    ASSERT_NE(copy_bool, bool_weak);
    ASSERT_TRUE(copy_bool->is_bool());
    bool copy_bool_value = false;
    ASSERT_TRUE(copy_bool->GetAsBoolean(&copy_bool_value));
    ASSERT_TRUE(copy_bool_value);
  
    Value* copy_int = nullptr;
    ASSERT_TRUE(copy_dict->Get("int", &copy_int));
    ASSERT_TRUE(copy_int);
    ASSERT_NE(copy_int, int_weak);
    ASSERT_TRUE(copy_int->is_int());
    int copy_int_value = 0;
    ASSERT_TRUE(copy_int->GetAsInteger(&copy_int_value));
    ASSERT_EQ(42, copy_int_value);
  
    Value* copy_double = nullptr;
    ASSERT_TRUE(copy_dict->Get("double", &copy_double));
    ASSERT_TRUE(copy_double);
    ASSERT_NE(copy_double, double_weak);
    ASSERT_TRUE(copy_double->is_double());
    double copy_double_value = 0;
    ASSERT_TRUE(copy_double->GetAsDouble(&copy_double_value));
    ASSERT_EQ(3.14, copy_double_value);
  
    Value* copy_string = nullptr;
    ASSERT_TRUE(copy_dict->Get("string", &copy_string));
    ASSERT_TRUE(copy_string);
    ASSERT_NE(copy_string, string_weak);
    ASSERT_TRUE(copy_string->is_string());
    std::string copy_string_value;
    std::u16string copy_string16_value;
    ASSERT_TRUE(copy_string->GetAsString(&copy_string_value));
    ASSERT_TRUE(copy_string->GetAsString(&copy_string16_value));
    ASSERT_EQ(std::string("hello"), copy_string_value);
    ASSERT_EQ(u"hello", copy_string16_value);
  
    Value* copy_string16 = nullptr;
    ASSERT_TRUE(copy_dict->Get("string16", &copy_string16));
    ASSERT_TRUE(copy_string16);
    ASSERT_NE(copy_string16, string16_weak);
    ASSERT_TRUE(copy_string16->is_string());
    ASSERT_TRUE(copy_string16->GetAsString(&copy_string_value));
    ASSERT_TRUE(copy_string16->GetAsString(&copy_string16_value));
    ASSERT_EQ(std::string("hello16"), copy_string_value);
    ASSERT_EQ(u"hello16", copy_string16_value);
  
    Value* copy_binary = nullptr;
    ASSERT_TRUE(copy_dict->Get("binary", &copy_binary));
    ASSERT_TRUE(copy_binary);
    ASSERT_NE(copy_binary, binary_weak);
    ASSERT_TRUE(copy_binary->is_blob());
    ASSERT_NE(binary_weak->GetBlob().data(), copy_binary->GetBlob().data());
    ASSERT_EQ(binary_weak->GetBlob(), copy_binary->GetBlob());
  
    Value* copy_value = nullptr;
    ASSERT_TRUE(copy_dict->Get("list", &copy_value));
    ASSERT_TRUE(copy_value);
    ASSERT_NE(copy_value, list_weak);
    ASSERT_TRUE(copy_value->is_list());
    ListValue* copy_list = nullptr;
    ASSERT_TRUE(copy_value->GetAsList(&copy_list));
    ASSERT_TRUE(copy_list);
    ASSERT_EQ(2U, copy_list->GetSize());
  
    Value* copy_list_element_0;
    ASSERT_TRUE(copy_list->Get(0, &copy_list_element_0));
    ASSERT_TRUE(copy_list_element_0);
    ASSERT_NE(copy_list_element_0, list_element_0_weak);
    int copy_list_element_0_value;
    ASSERT_TRUE(copy_list_element_0->GetAsInteger(&copy_list_element_0_value));
    ASSERT_EQ(0, copy_list_element_0_value);
  
    Value* copy_list_element_1;
    ASSERT_TRUE(copy_list->Get(1, &copy_list_element_1));
    ASSERT_TRUE(copy_list_element_1);
    ASSERT_NE(copy_list_element_1, list_element_1_weak);
    int copy_list_element_1_value;
    ASSERT_TRUE(copy_list_element_1->GetAsInteger(&copy_list_element_1_value));
    ASSERT_EQ(1, copy_list_element_1_value);
  
    copy_value = nullptr;
    ASSERT_TRUE(copy_dict->Get("dictionary", &copy_value));
    ASSERT_TRUE(copy_value);
    ASSERT_NE(copy_value, dict_weak);
    ASSERT_TRUE(copy_value->is_dict());
    DictionaryValue* copy_nested_dictionary = nullptr;
    ASSERT_TRUE(copy_value->GetAsDictionary(&copy_nested_dictionary));
    ASSERT_TRUE(copy_nested_dictionary);
    EXPECT_TRUE(copy_nested_dictionary->HasKey("key"));
  }
  
  TEST(ValuesTest, Equals) {
    auto null1 = std::make_unique<Value>();
    auto null2 = std::make_unique<Value>();
    EXPECT_NE(null1.get(), null2.get());
    EXPECT_EQ(*null1, *null2);
  
    Value boolean(false);
    EXPECT_NE(*null1, boolean);
  
    DictionaryValue dv;
    dv.SetBoolKey("a", false);
    dv.SetIntKey("b", 2);
    dv.SetDoubleKey("c", 2.5);
    dv.SetStringKey("d1", "string");
    dv.SetStringKey("d2", u"http://google.com");
    dv.Set("e", std::make_unique<Value>());
  
    auto copy = dv.CreateDeepCopy();
    EXPECT_EQ(dv, *copy);
  
    std::unique_ptr<ListValue> list(new ListValue);
    list->Append(std::make_unique<Value>());
    list->Append(std::make_unique<DictionaryValue>());
    auto list_copy = std::make_unique<Value>(list->Clone());
  
    ListValue* list_weak = dv.SetList("f", std::move(list));
    EXPECT_NE(dv, *copy);
    copy->Set("f", std::move(list_copy));
    EXPECT_EQ(dv, *copy);
  
    list_weak->Append(std::make_unique<Value>(true));
    EXPECT_NE(dv, *copy);
  
    // Check if Equals detects differences in only the keys.
    copy = dv.CreateDeepCopy();
    EXPECT_EQ(dv, *copy);
    copy->Remove("a", nullptr);
    copy->SetBoolKey("aa", false);
    EXPECT_NE(dv, *copy);
  }
  
  TEST(ValuesTest, Comparisons) {
    // Test None Values.
    Value null1;
    Value null2;
    EXPECT_EQ(null1, null2);
    EXPECT_FALSE(null1 != null2);
    EXPECT_FALSE(null1 < null2);
    EXPECT_FALSE(null1 > null2);
    EXPECT_LE(null1, null2);
    EXPECT_GE(null1, null2);
  
    // Test Bool Values.
    Value bool1(false);
    Value bool2(true);
    EXPECT_FALSE(bool1 == bool2);
    EXPECT_NE(bool1, bool2);
    EXPECT_LT(bool1, bool2);
    EXPECT_FALSE(bool1 > bool2);
    EXPECT_LE(bool1, bool2);
    EXPECT_FALSE(bool1 >= bool2);
  
    // Test Int Values.
    Value int1(1);
    Value int2(2);
    EXPECT_FALSE(int1 == int2);
    EXPECT_NE(int1, int2);
    EXPECT_LT(int1, int2);
    EXPECT_FALSE(int1 > int2);
    EXPECT_LE(int1, int2);
    EXPECT_FALSE(int1 >= int2);
  
    // Test Double Values.
    Value double1(1.0);
    Value double2(2.0);
    EXPECT_FALSE(double1 == double2);
    EXPECT_NE(double1, double2);
    EXPECT_LT(double1, double2);
    EXPECT_FALSE(double1 > double2);
    EXPECT_LE(double1, double2);
    EXPECT_FALSE(double1 >= double2);
  
    // Test String Values.
    Value string1("1");
    Value string2("2");
    EXPECT_FALSE(string1 == string2);
    EXPECT_NE(string1, string2);
    EXPECT_LT(string1, string2);
    EXPECT_FALSE(string1 > string2);
    EXPECT_LE(string1, string2);
    EXPECT_FALSE(string1 >= string2);
  
    // Test Binary Values.
    Value binary1(Value::BlobStorage{0x01});
    Value binary2(Value::BlobStorage{0x02});
    EXPECT_FALSE(binary1 == binary2);
    EXPECT_NE(binary1, binary2);
    EXPECT_LT(binary1, binary2);
    EXPECT_FALSE(binary1 > binary2);
    EXPECT_LE(binary1, binary2);
    EXPECT_FALSE(binary1 >= binary2);
  
    // Test Empty List Values.
    ListValue null_list1;
    ListValue null_list2;
    EXPECT_EQ(null_list1, null_list2);
    EXPECT_FALSE(null_list1 != null_list2);
    EXPECT_FALSE(null_list1 < null_list2);
    EXPECT_FALSE(null_list1 > null_list2);
    EXPECT_LE(null_list1, null_list2);
    EXPECT_GE(null_list1, null_list2);
  
    // Test Non Empty List Values.
    ListValue int_list1;
    ListValue int_list2;
    int_list1.AppendInteger(1);
    int_list2.AppendInteger(2);
    EXPECT_FALSE(int_list1 == int_list2);
    EXPECT_NE(int_list1, int_list2);
    EXPECT_LT(int_list1, int_list2);
    EXPECT_FALSE(int_list1 > int_list2);
    EXPECT_LE(int_list1, int_list2);
    EXPECT_FALSE(int_list1 >= int_list2);
  
    // Test Empty Dict Values.
    DictionaryValue null_dict1;
    DictionaryValue null_dict2;
    EXPECT_EQ(null_dict1, null_dict2);
    EXPECT_FALSE(null_dict1 != null_dict2);
    EXPECT_FALSE(null_dict1 < null_dict2);
    EXPECT_FALSE(null_dict1 > null_dict2);
    EXPECT_LE(null_dict1, null_dict2);
    EXPECT_GE(null_dict1, null_dict2);
  
    // Test Non Empty Dict Values.
    DictionaryValue int_dict1;
    DictionaryValue int_dict2;
    int_dict1.SetIntKey("key", 1);
    int_dict2.SetIntKey("key", 2);
    EXPECT_FALSE(int_dict1 == int_dict2);
    EXPECT_NE(int_dict1, int_dict2);
    EXPECT_LT(int_dict1, int_dict2);
    EXPECT_FALSE(int_dict1 > int_dict2);
    EXPECT_LE(int_dict1, int_dict2);
    EXPECT_FALSE(int_dict1 >= int_dict2);
  
    // Test Values of different types.
    std::vector<Value> values;
    values.emplace_back(std::move(null1));
    values.emplace_back(std::move(bool1));
    values.emplace_back(std::move(int1));
    values.emplace_back(std::move(double1));
    values.emplace_back(std::move(string1));
    values.emplace_back(std::move(binary1));
    values.emplace_back(std::move(int_dict1));
    values.emplace_back(std::move(int_list1));
    for (size_t i = 0; i < values.size(); ++i) {
      for (size_t j = i + 1; j < values.size(); ++j) {
        EXPECT_FALSE(values[i] == values[j]);
        EXPECT_NE(values[i], values[j]);
        EXPECT_LT(values[i], values[j]);
        EXPECT_FALSE(values[i] > values[j]);
        EXPECT_LE(values[i], values[j]);
        EXPECT_FALSE(values[i] >= values[j]);
      }
    }
  }
  
  TEST(ValuesTest, DeepCopyCovariantReturnTypes) {
    DictionaryValue original_dict;
    Value* null_weak = original_dict.SetKey("null", Value());
    Value* bool_weak = original_dict.SetKey("bool", Value(true));
    Value* int_weak = original_dict.SetKey("int", Value(42));
    Value* double_weak = original_dict.SetKey("double", Value(3.14));
    Value* string_weak = original_dict.SetKey("string", Value("hello"));
    Value* string16_weak = original_dict.SetKey("string16", Value(u"hello16"));
    Value* binary_weak =
        original_dict.SetKey("binary", Value(Value::BlobStorage(42, '!')));
  
    Value::ListStorage storage;
    storage.emplace_back(0);
    storage.emplace_back(1);
    Value* list_weak = original_dict.SetKey("list", Value(std::move(storage)));
  
    auto copy_dict = std::make_unique<Value>(original_dict.Clone());
    auto copy_null = std::make_unique<Value>(null_weak->Clone());
    auto copy_bool = std::make_unique<Value>(bool_weak->Clone());
    auto copy_int = std::make_unique<Value>(int_weak->Clone());
    auto copy_double = std::make_unique<Value>(double_weak->Clone());
    auto copy_string = std::make_unique<Value>(string_weak->Clone());
    auto copy_string16 = std::make_unique<Value>(string16_weak->Clone());
    auto copy_binary = std::make_unique<Value>(binary_weak->Clone());
    auto copy_list = std::make_unique<Value>(list_weak->Clone());
  
    EXPECT_EQ(original_dict, *copy_dict);
    EXPECT_EQ(*null_weak, *copy_null);
    EXPECT_EQ(*bool_weak, *copy_bool);
    EXPECT_EQ(*int_weak, *copy_int);
    EXPECT_EQ(*double_weak, *copy_double);
    EXPECT_EQ(*string_weak, *copy_string);
    EXPECT_EQ(*string16_weak, *copy_string16);
    EXPECT_EQ(*binary_weak, *copy_binary);
    EXPECT_EQ(*list_weak, *copy_list);
  }
  
  TEST(ValuesTest, RemoveEmptyChildren) {
    auto root = std::make_unique<DictionaryValue>();
    // Remove empty lists and dictionaries.
    root->Set("empty_dict", std::make_unique<DictionaryValue>());
    root->Set("empty_list", std::make_unique<ListValue>());
    root->SetKey("a.b.c.d.e", DictionaryValue());
    root = root->DeepCopyWithoutEmptyChildren();
    EXPECT_TRUE(root->DictEmpty());
  
    // Make sure we don't prune too much.
    root->SetBoolKey("bool", true);
    root->Set("empty_dict", std::make_unique<DictionaryValue>());
    root->SetStringKey("empty_string", std::string());
    root = root->DeepCopyWithoutEmptyChildren();
    EXPECT_EQ(2U, root->DictSize());
  
    // Should do nothing.
    root = root->DeepCopyWithoutEmptyChildren();
    EXPECT_EQ(2U, root->DictSize());
  
    // Nested test cases.  These should all reduce back to the bool and string
    // set above.
    {
      root->Set("a.b.c.d.e", std::make_unique<DictionaryValue>());
      root = root->DeepCopyWithoutEmptyChildren();
      EXPECT_EQ(2U, root->DictSize());
    }
    {
      auto inner = std::make_unique<DictionaryValue>();
      inner->Set("empty_dict", std::make_unique<DictionaryValue>());
      inner->Set("empty_list", std::make_unique<ListValue>());
      root->Set("dict_with_empty_children", std::move(inner));
      root = root->DeepCopyWithoutEmptyChildren();
      EXPECT_EQ(2U, root->DictSize());
    }
    {
      auto inner = std::make_unique<ListValue>();
      inner->Append(std::make_unique<DictionaryValue>());
      inner->Append(std::make_unique<ListValue>());
      root->Set("list_with_empty_children", std::move(inner));
      root = root->DeepCopyWithoutEmptyChildren();
      EXPECT_EQ(2U, root->DictSize());
    }
  
    // Nested with siblings.
    {
      auto inner = std::make_unique<ListValue>();
      inner->Append(std::make_unique<DictionaryValue>());
      inner->Append(std::make_unique<ListValue>());
      root->Set("list_with_empty_children", std::move(inner));
      auto inner2 = std::make_unique<DictionaryValue>();
      inner2->Set("empty_dict", std::make_unique<DictionaryValue>());
      inner2->Set("empty_list", std::make_unique<ListValue>());
      root->Set("dict_with_empty_children", std::move(inner2));
      root = root->DeepCopyWithoutEmptyChildren();
      EXPECT_EQ(2U, root->DictSize());
    }
  
    // Make sure nested values don't get pruned.
    {
      auto inner = std::make_unique<ListValue>();
      auto inner2 = std::make_unique<ListValue>();
      inner2->Append(std::make_unique<Value>("hello"));
      inner->Append(std::make_unique<DictionaryValue>());
      inner->Append(std::move(inner2));
      root->Set("list_with_empty_children", std::move(inner));
      root = root->DeepCopyWithoutEmptyChildren();
      EXPECT_EQ(3U, root->DictSize());
  
      ListValue* inner_value;
      EXPECT_TRUE(root->GetList("list_with_empty_children", &inner_value));
      EXPECT_EQ(1U, inner_value->GetSize());  // Dictionary was pruned.
      ListValue* inner_value2;
      EXPECT_TRUE(inner_value->GetList(0, &inner_value2));
      EXPECT_EQ(1U, inner_value2->GetSize());
    }
  }
  
  TEST(ValuesTest, MergeDictionary) {
    std::unique_ptr<DictionaryValue> base(new DictionaryValue);
    base->SetStringKey("base_key", "base_key_value_base");
    base->SetStringKey("collide_key", "collide_key_value_base");
    std::unique_ptr<DictionaryValue> base_sub_dict(new DictionaryValue);
    base_sub_dict->SetStringKey("sub_base_key", "sub_base_key_value_base");
    base_sub_dict->SetStringKey("sub_collide_key", "sub_collide_key_value_base");
    base->Set("sub_dict_key", std::move(base_sub_dict));
  
    std::unique_ptr<DictionaryValue> merge(new DictionaryValue);
    merge->SetStringKey("merge_key", "merge_key_value_merge");
    merge->SetStringKey("collide_key", "collide_key_value_merge");
    std::unique_ptr<DictionaryValue> merge_sub_dict(new DictionaryValue);
    merge_sub_dict->SetStringKey("sub_merge_key", "sub_merge_key_value_merge");
    merge_sub_dict->SetStringKey("sub_collide_key",
                                 "sub_collide_key_value_merge");
    merge->Set("sub_dict_key", std::move(merge_sub_dict));
  
    base->MergeDictionary(merge.get());
  
    EXPECT_EQ(4U, base->DictSize());
    std::string base_key_value;
    EXPECT_TRUE(base->GetString("base_key", &base_key_value));
    EXPECT_EQ("base_key_value_base", base_key_value);  // Base value preserved.
    std::string collide_key_value;
    EXPECT_TRUE(base->GetString("collide_key", &collide_key_value));
    EXPECT_EQ("collide_key_value_merge", collide_key_value);  // Replaced.
    std::string merge_key_value;
    EXPECT_TRUE(base->GetString("merge_key", &merge_key_value));
    EXPECT_EQ("merge_key_value_merge", merge_key_value);  // Merged in.
  
    DictionaryValue* res_sub_dict;
    EXPECT_TRUE(base->GetDictionary("sub_dict_key", &res_sub_dict));
    EXPECT_EQ(3U, res_sub_dict->DictSize());
    std::string sub_base_key_value;
    EXPECT_TRUE(res_sub_dict->GetString("sub_base_key", &sub_base_key_value));
    EXPECT_EQ("sub_base_key_value_base", sub_base_key_value);  // Preserved.
    std::string sub_collide_key_value;
    EXPECT_TRUE(
        res_sub_dict->GetString("sub_collide_key", &sub_collide_key_value));
    EXPECT_EQ("sub_collide_key_value_merge", sub_collide_key_value);  // Replaced.
    std::string sub_merge_key_value;
    EXPECT_TRUE(res_sub_dict->GetString("sub_merge_key", &sub_merge_key_value));
    EXPECT_EQ("sub_merge_key_value_merge", sub_merge_key_value);  // Merged in.
  }
  
  TEST(ValuesTest, MergeDictionaryDeepCopy) {
    std::unique_ptr<DictionaryValue> child(new DictionaryValue);
    DictionaryValue* original_child = child.get();
    child->SetStringKey("test", "value");
    EXPECT_EQ(1U, child->DictSize());
  
    std::string value;
    EXPECT_TRUE(child->GetString("test", &value));
    EXPECT_EQ("value", value);
  
    std::unique_ptr<DictionaryValue> base(new DictionaryValue);
    base->Set("dict", std::move(child));
    EXPECT_EQ(1U, base->DictSize());
  
    DictionaryValue* ptr;
    EXPECT_TRUE(base->GetDictionary("dict", &ptr));
    EXPECT_EQ(original_child, ptr);
  
    std::unique_ptr<DictionaryValue> merged(new DictionaryValue);
    merged->MergeDictionary(base.get());
    EXPECT_EQ(1U, merged->DictSize());
    EXPECT_TRUE(merged->GetDictionary("dict", &ptr));
    EXPECT_NE(original_child, ptr);
    EXPECT_TRUE(ptr->GetString("test", &value));
    EXPECT_EQ("value", value);
  
    original_child->SetStringKey("test", "overwrite");
    base.reset();
    EXPECT_TRUE(ptr->GetString("test", &value));
    EXPECT_EQ("value", value);
  }
  
  TEST(ValuesTest, DictionaryIterator) {
    DictionaryValue dict;
    for (DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
      ADD_FAILURE();
    }
  
    Value value1("value1");
    dict.SetKey("key1", value1.Clone());
    bool seen1 = false;
    for (DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
      EXPECT_FALSE(seen1);
      EXPECT_EQ("key1", it.key());
      EXPECT_EQ(value1, it.value());
      seen1 = true;
    }
    EXPECT_TRUE(seen1);
  
    Value value2("value2");
    dict.SetKey("key2", value2.Clone());
    bool seen2 = seen1 = false;
    for (DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
      if (it.key() == "key1") {
        EXPECT_FALSE(seen1);
        EXPECT_EQ(value1, it.value());
        seen1 = true;
      } else if (it.key() == "key2") {
        EXPECT_FALSE(seen2);
        EXPECT_EQ(value2, it.value());
        seen2 = true;
      } else {
        ADD_FAILURE();
      }
    }
    EXPECT_TRUE(seen1);
    EXPECT_TRUE(seen2);
  }
  
  TEST(ValuesTest, MutatingCopiedPairsInDictItemsMutatesUnderlyingValues) {
    Value dict(Value::Type::DICTIONARY);
    dict.SetKey("key", Value("initial value"));
  
    // Because the non-const DictItems() iterates over
    // <const std::string&, Value&> pairs, it's possible
    // to alter iterated-over values in place even when
    // "copying" the key-value pair:
    for (auto kv : dict.DictItems())
      kv.second.GetString() = "replacement";
  
    std::string* found = dict.FindStringKey("key");
    ASSERT_TRUE(found);
    EXPECT_EQ(*found, "replacement");
  }
  
  TEST(ValuesTest, StdDictionaryIterator) {
    DictionaryValue dict;
    for (auto it = dict.DictItems().begin(); it != dict.DictItems().end(); ++it) {
      ADD_FAILURE();
    }
  
    Value value1("value1");
    dict.SetKey("key1", value1.Clone());
    bool seen1 = false;
    for (const auto& it : dict.DictItems()) {
      EXPECT_FALSE(seen1);
      EXPECT_EQ("key1", it.first);
      EXPECT_EQ(value1, it.second);
      seen1 = true;
    }
    EXPECT_TRUE(seen1);
  
    Value value2("value2");
    dict.SetKey("key2", value2.Clone());
    bool seen2 = seen1 = false;
    for (const auto& it : dict.DictItems()) {
      if (it.first == "key1") {
        EXPECT_FALSE(seen1);
        EXPECT_EQ(value1, it.second);
        seen1 = true;
      } else if (it.first == "key2") {
        EXPECT_FALSE(seen2);
        EXPECT_EQ(value2, it.second);
        seen2 = true;
      } else {
        ADD_FAILURE();
      }
    }
    EXPECT_TRUE(seen1);
    EXPECT_TRUE(seen2);
  }
  
  // DictionaryValue/ListValue's Get*() methods should accept NULL as an out-value
  // and still return true/false based on success.
  TEST(ValuesTest, GetWithNullOutValue) {
    DictionaryValue main_dict;
    ListValue main_list;
  
    Value bool_value(false);
    Value int_value(1234);
    Value double_value(12.34567);
    Value string_value("foo");
    Value binary_value(Value::Type::BINARY);
    DictionaryValue dict_value;
    ListValue list_value;
  
    main_dict.SetKey("bool", bool_value.Clone());
    main_dict.SetKey("int", int_value.Clone());
    main_dict.SetKey("double", double_value.Clone());
    main_dict.SetKey("string", string_value.Clone());
    main_dict.SetKey("binary", binary_value.Clone());
    main_dict.SetKey("dict", dict_value.Clone());
    main_dict.SetKey("list", list_value.Clone());
  
    main_list.Append(std::make_unique<Value>(bool_value.Clone()));
    main_list.Append(std::make_unique<Value>(int_value.Clone()));
    main_list.Append(std::make_unique<Value>(double_value.Clone()));
    main_list.Append(std::make_unique<Value>(string_value.Clone()));
    main_list.Append(std::make_unique<Value>(binary_value.Clone()));
    main_list.Append(std::make_unique<Value>(dict_value.Clone()));
    main_list.Append(std::make_unique<Value>(list_value.Clone()));
  
    EXPECT_TRUE(main_dict.Get("bool", nullptr));
    EXPECT_TRUE(main_dict.Get("int", nullptr));
    EXPECT_TRUE(main_dict.Get("double", nullptr));
    EXPECT_TRUE(main_dict.Get("string", nullptr));
    EXPECT_TRUE(main_dict.Get("binary", nullptr));
    EXPECT_TRUE(main_dict.Get("dict", nullptr));
    EXPECT_TRUE(main_dict.Get("list", nullptr));
    EXPECT_FALSE(main_dict.Get("DNE", nullptr));
  
    EXPECT_TRUE(main_dict.GetBoolean("bool", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("int", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("double", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("string", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("binary", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("dict", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("list", nullptr));
    EXPECT_FALSE(main_dict.GetBoolean("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetInteger("bool", nullptr));
    EXPECT_TRUE(main_dict.GetInteger("int", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("double", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("string", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("binary", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("dict", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("list", nullptr));
    EXPECT_FALSE(main_dict.GetInteger("DNE", nullptr));
  
    // Both int and double values can be obtained from GetDouble.
    EXPECT_FALSE(main_dict.GetDouble("bool", nullptr));
    EXPECT_TRUE(main_dict.GetDouble("int", nullptr));
    EXPECT_TRUE(main_dict.GetDouble("double", nullptr));
    EXPECT_FALSE(main_dict.GetDouble("string", nullptr));
    EXPECT_FALSE(main_dict.GetDouble("binary", nullptr));
    EXPECT_FALSE(main_dict.GetDouble("dict", nullptr));
    EXPECT_FALSE(main_dict.GetDouble("list", nullptr));
    EXPECT_FALSE(main_dict.GetDouble("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetString("bool", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetString("int", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("double", static_cast<std::string*>(nullptr)));
    EXPECT_TRUE(
        main_dict.GetString("string", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("binary", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetString("dict", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetString("list", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetString("DNE", static_cast<std::string*>(nullptr)));
  
    EXPECT_FALSE(
        main_dict.GetString("bool", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("int", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("double", static_cast<std::u16string*>(nullptr)));
    EXPECT_TRUE(
        main_dict.GetString("string", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("binary", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("dict", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("list", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(
        main_dict.GetString("DNE", static_cast<std::u16string*>(nullptr)));
  
    EXPECT_FALSE(main_dict.GetBinary("bool", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("int", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("double", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("string", nullptr));
    EXPECT_TRUE(main_dict.GetBinary("binary", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("dict", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("list", nullptr));
    EXPECT_FALSE(main_dict.GetBinary("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetDictionary("bool", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("int", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("double", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("string", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("binary", nullptr));
    EXPECT_TRUE(main_dict.GetDictionary("dict", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("list", nullptr));
    EXPECT_FALSE(main_dict.GetDictionary("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetList("bool", nullptr));
    EXPECT_FALSE(main_dict.GetList("int", nullptr));
    EXPECT_FALSE(main_dict.GetList("double", nullptr));
    EXPECT_FALSE(main_dict.GetList("string", nullptr));
    EXPECT_FALSE(main_dict.GetList("binary", nullptr));
    EXPECT_FALSE(main_dict.GetList("dict", nullptr));
    EXPECT_TRUE(main_dict.GetList("list", nullptr));
    EXPECT_FALSE(main_dict.GetList("DNE", nullptr));
  
    EXPECT_TRUE(main_dict.FindKey("bool"));
    EXPECT_TRUE(main_dict.FindKey("int"));
    EXPECT_TRUE(main_dict.FindKey("double"));
    EXPECT_TRUE(main_dict.FindKey("string"));
    EXPECT_TRUE(main_dict.FindKey("binary"));
    EXPECT_TRUE(main_dict.FindKey("dict"));
    EXPECT_TRUE(main_dict.FindKey("list"));
    EXPECT_FALSE(main_dict.FindKey("DNE"));
  
    EXPECT_NE(absl::nullopt, main_dict.FindBoolKey("bool"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("int"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("double"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("string"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("binary"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("list"));
    EXPECT_EQ(absl::nullopt, main_dict.FindBoolKey("DNE"));
  
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("bool"));
    EXPECT_NE(absl::nullopt, main_dict.FindIntKey("int"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("double"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("string"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("binary"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("dict"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("list"));
    EXPECT_EQ(absl::nullopt, main_dict.FindIntKey("DNE"));
  
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("bool", nullptr));
    EXPECT_TRUE(main_dict.GetDoubleWithoutPathExpansion("int", nullptr));
    EXPECT_TRUE(main_dict.GetDoubleWithoutPathExpansion("double", nullptr));
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("string", nullptr));
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("binary", nullptr));
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("dict", nullptr));
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("list", nullptr));
    EXPECT_FALSE(main_dict.GetDoubleWithoutPathExpansion("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "bool", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "int", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "double", static_cast<std::string*>(nullptr)));
    EXPECT_TRUE(main_dict.GetStringWithoutPathExpansion(
        "string", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "binary", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "dict", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "list", static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "DNE", static_cast<std::string*>(nullptr)));
  
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "bool", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "int", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "double", static_cast<std::u16string*>(nullptr)));
    EXPECT_TRUE(main_dict.GetStringWithoutPathExpansion(
        "string", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "binary", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "dict", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "list", static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_dict.GetStringWithoutPathExpansion(
        "DNE", static_cast<std::u16string*>(nullptr)));
  
    // There is no GetBinaryWithoutPathExpansion for some reason, but if there
    // were it should be tested here...
  
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("bool", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("int", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("double", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("string", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("binary", nullptr));
    EXPECT_TRUE(main_dict.GetDictionaryWithoutPathExpansion("dict", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("list", nullptr));
    EXPECT_FALSE(main_dict.GetDictionaryWithoutPathExpansion("DNE", nullptr));
  
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("bool", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("int", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("double", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("string", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("binary", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("dict", nullptr));
    EXPECT_TRUE(main_dict.GetListWithoutPathExpansion("list", nullptr));
    EXPECT_FALSE(main_dict.GetListWithoutPathExpansion("DNE", nullptr));
  
    EXPECT_TRUE(main_list.Get(0, nullptr));
    EXPECT_TRUE(main_list.Get(1, nullptr));
    EXPECT_TRUE(main_list.Get(2, nullptr));
    EXPECT_TRUE(main_list.Get(3, nullptr));
    EXPECT_TRUE(main_list.Get(4, nullptr));
    EXPECT_TRUE(main_list.Get(5, nullptr));
    EXPECT_TRUE(main_list.Get(6, nullptr));
    EXPECT_FALSE(main_list.Get(7, nullptr));
  
    EXPECT_TRUE(main_list.GetBoolean(0, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(1, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(2, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(3, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(4, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(5, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(6, nullptr));
    EXPECT_FALSE(main_list.GetBoolean(7, nullptr));
  
    EXPECT_FALSE(main_list.GetInteger(0, nullptr));
    EXPECT_TRUE(main_list.GetInteger(1, nullptr));
    EXPECT_FALSE(main_list.GetInteger(2, nullptr));
    EXPECT_FALSE(main_list.GetInteger(3, nullptr));
    EXPECT_FALSE(main_list.GetInteger(4, nullptr));
    EXPECT_FALSE(main_list.GetInteger(5, nullptr));
    EXPECT_FALSE(main_list.GetInteger(6, nullptr));
    EXPECT_FALSE(main_list.GetInteger(7, nullptr));
  
    EXPECT_FALSE(main_list.GetDouble(0, nullptr));
    EXPECT_TRUE(main_list.GetDouble(1, nullptr));
    EXPECT_TRUE(main_list.GetDouble(2, nullptr));
    EXPECT_FALSE(main_list.GetDouble(3, nullptr));
    EXPECT_FALSE(main_list.GetDouble(4, nullptr));
    EXPECT_FALSE(main_list.GetDouble(5, nullptr));
    EXPECT_FALSE(main_list.GetDouble(6, nullptr));
    EXPECT_FALSE(main_list.GetDouble(7, nullptr));
  
    EXPECT_FALSE(main_list.GetString(0, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(1, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(2, static_cast<std::string*>(nullptr)));
    EXPECT_TRUE(main_list.GetString(3, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(4, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(5, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(6, static_cast<std::string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(7, static_cast<std::string*>(nullptr)));
  
    EXPECT_FALSE(main_list.GetString(0, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(1, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(2, static_cast<std::u16string*>(nullptr)));
    EXPECT_TRUE(main_list.GetString(3, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(4, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(5, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(6, static_cast<std::u16string*>(nullptr)));
    EXPECT_FALSE(main_list.GetString(7, static_cast<std::u16string*>(nullptr)));
  
    EXPECT_FALSE(main_list.GetDictionary(0, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(1, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(2, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(3, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(4, nullptr));
    EXPECT_TRUE(main_list.GetDictionary(5, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(6, nullptr));
    EXPECT_FALSE(main_list.GetDictionary(7, nullptr));
  
    EXPECT_FALSE(main_list.GetList(0, nullptr));
    EXPECT_FALSE(main_list.GetList(1, nullptr));
    EXPECT_FALSE(main_list.GetList(2, nullptr));
    EXPECT_FALSE(main_list.GetList(3, nullptr));
    EXPECT_FALSE(main_list.GetList(4, nullptr));
    EXPECT_FALSE(main_list.GetList(5, nullptr));
    EXPECT_TRUE(main_list.GetList(6, nullptr));
    EXPECT_FALSE(main_list.GetList(7, nullptr));
  }
  
  TEST(ValuesTest, SelfSwap) {
    base::Value test(1);
    std::swap(test, test);
    EXPECT_EQ(1, test.GetInt());
  }
  
  TEST(ValuesTest, FromToUniquePtrValue) {
    std::unique_ptr<DictionaryValue> dict = std::make_unique<DictionaryValue>();
    dict->SetStringKey("name", "Froogle");
    dict->SetStringKey("url", "http://froogle.com");
    Value dict_copy = dict->Clone();
  
    Value dict_converted = Value::FromUniquePtrValue(std::move(dict));
    EXPECT_EQ(dict_copy, dict_converted);
  
    std::unique_ptr<Value> val =
        Value::ToUniquePtrValue(std::move(dict_converted));
    EXPECT_EQ(dict_copy, *val);
  }
  
  TEST(ValuesTest, MutableFindStringPath) {
    Value dict(Value::Type::DICTIONARY);
    dict.SetStringPath("foo.bar", "value");
  
    *(dict.FindStringPath("foo.bar")) = "new_value";
  
    Value expected_dict(Value::Type::DICTIONARY);
    expected_dict.SetStringPath("foo.bar", "new_value");
  
    EXPECT_EQ(expected_dict, dict);
  }
  
  TEST(ValuesTest, MutableGetString) {
    Value value("value");
    value.GetString() = "new_value";
    EXPECT_EQ("new_value", value.GetString());
  }
  
  #if BUILDFLAG(ENABLE_BASE_TRACING)
  TEST(ValuesTest, TracingSupport) {
    EXPECT_EQ(perfetto::TracedValueToString(Value(false)), "false");
    EXPECT_EQ(perfetto::TracedValueToString(Value(1)), "1");
    EXPECT_EQ(perfetto::TracedValueToString(Value(1.5)), "1.5");
    EXPECT_EQ(perfetto::TracedValueToString(Value("value")), "value");
    EXPECT_EQ(perfetto::TracedValueToString(Value(Value::Type::NONE)), "<none>");
    {
      Value::ListStorage list;
      list.emplace_back(2);
      list.emplace_back(3);
      EXPECT_EQ(perfetto::TracedValueToString(Value(list)), "[2,3]");
    }
    {
      Value::DictStorage dict;
      dict["key"] = Value("value");
      EXPECT_EQ(perfetto::TracedValueToString(Value(dict)), "{key:value}");
    }
  }
  #endif  // BUILDFLAG(ENABLE_BASE_TRACING)
  
  }  // namespace base
  