472 lines
17 KiB
C++
472 lines
17 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <string>
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#include "base/file_util.h"
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#include "base/files/scoped_temp_dir.h"
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#include "base/json/json_file_value_serializer.h"
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#include "base/json/json_reader.h"
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#include "base/json/json_string_value_serializer.h"
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#include "base/json/json_writer.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/path_service.h"
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#include "base/strings/string_util.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/values.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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// Some proper JSON to test with:
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const char kProperJSON[] =
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"{\n"
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" \"compound\": {\n"
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" \"a\": 1,\n"
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" \"b\": 2\n"
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" },\n"
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" \"some_String\": \"1337\",\n"
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" \"some_int\": 42,\n"
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" \"the_list\": [ \"val1\", \"val2\" ]\n"
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"}\n";
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// Some proper JSON with trailing commas:
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const char kProperJSONWithCommas[] =
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"{\n"
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"\t\"some_int\": 42,\n"
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"\t\"some_String\": \"1337\",\n"
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"\t\"the_list\": [\"val1\", \"val2\", ],\n"
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"\t\"compound\": { \"a\": 1, \"b\": 2, },\n"
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"}\n";
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const char kWinLineEnds[] = "\r\n";
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const char kLinuxLineEnds[] = "\n";
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// Verifies the generated JSON against the expected output.
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void CheckJSONIsStillTheSame(Value& value) {
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// Serialize back the output.
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std::string serialized_json;
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JSONStringValueSerializer str_serializer(&serialized_json);
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str_serializer.set_pretty_print(true);
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ASSERT_TRUE(str_serializer.Serialize(value));
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// Unify line endings between platforms.
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ReplaceSubstringsAfterOffset(&serialized_json, 0,
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kWinLineEnds, kLinuxLineEnds);
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// Now compare the input with the output.
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ASSERT_EQ(kProperJSON, serialized_json);
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}
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void ValidateJsonList(const std::string& json) {
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scoped_ptr<Value> root(JSONReader::Read(json));
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ASSERT_TRUE(root.get() && root->IsType(Value::TYPE_LIST));
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ListValue* list = static_cast<ListValue*>(root.get());
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ASSERT_EQ(1U, list->GetSize());
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Value* elt = NULL;
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ASSERT_TRUE(list->Get(0, &elt));
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int value = 0;
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ASSERT_TRUE(elt && elt->GetAsInteger(&value));
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ASSERT_EQ(1, value);
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}
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// Test proper JSON [de]serialization from string is working.
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TEST(JSONValueSerializerTest, ReadProperJSONFromString) {
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// Try to deserialize it through the serializer.
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std::string proper_json(kProperJSON);
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JSONStringValueSerializer str_deserializer(proper_json);
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int error_code = 0;
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std::string error_message;
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scoped_ptr<Value> value(
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str_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_TRUE(value.get());
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ASSERT_EQ(0, error_code);
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ASSERT_TRUE(error_message.empty());
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// Verify if the same JSON is still there.
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CheckJSONIsStillTheSame(*value);
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}
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// Test that trialing commas are only properly deserialized from string when
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// the proper flag for that is set.
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TEST(JSONValueSerializerTest, ReadJSONWithTrailingCommasFromString) {
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// Try to deserialize it through the serializer.
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std::string proper_json(kProperJSONWithCommas);
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JSONStringValueSerializer str_deserializer(proper_json);
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int error_code = 0;
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std::string error_message;
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scoped_ptr<Value> value(
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str_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_FALSE(value.get());
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ASSERT_NE(0, error_code);
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ASSERT_FALSE(error_message.empty());
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// Now the flag is set and it must pass.
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str_deserializer.set_allow_trailing_comma(true);
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value.reset(str_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_TRUE(value.get());
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ASSERT_EQ(JSONReader::JSON_TRAILING_COMMA, error_code);
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// Verify if the same JSON is still there.
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CheckJSONIsStillTheSame(*value);
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}
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// Test proper JSON [de]serialization from file is working.
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TEST(JSONValueSerializerTest, ReadProperJSONFromFile) {
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ScopedTempDir tempdir;
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ASSERT_TRUE(tempdir.CreateUniqueTempDir());
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// Write it down in the file.
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FilePath temp_file(tempdir.path().AppendASCII("test.json"));
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ASSERT_EQ(static_cast<int>(strlen(kProperJSON)),
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file_util::WriteFile(temp_file, kProperJSON, strlen(kProperJSON)));
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// Try to deserialize it through the serializer.
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JSONFileValueSerializer file_deserializer(temp_file);
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int error_code = 0;
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std::string error_message;
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scoped_ptr<Value> value(
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file_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_TRUE(value.get());
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ASSERT_EQ(0, error_code);
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ASSERT_TRUE(error_message.empty());
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// Verify if the same JSON is still there.
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CheckJSONIsStillTheSame(*value);
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}
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// Test that trialing commas are only properly deserialized from file when
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// the proper flag for that is set.
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TEST(JSONValueSerializerTest, ReadJSONWithCommasFromFile) {
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ScopedTempDir tempdir;
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ASSERT_TRUE(tempdir.CreateUniqueTempDir());
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// Write it down in the file.
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FilePath temp_file(tempdir.path().AppendASCII("test.json"));
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ASSERT_EQ(static_cast<int>(strlen(kProperJSONWithCommas)),
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file_util::WriteFile(temp_file,
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kProperJSONWithCommas,
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strlen(kProperJSONWithCommas)));
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// Try to deserialize it through the serializer.
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JSONFileValueSerializer file_deserializer(temp_file);
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// This must fail without the proper flag.
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int error_code = 0;
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std::string error_message;
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scoped_ptr<Value> value(
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file_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_FALSE(value.get());
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ASSERT_NE(0, error_code);
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ASSERT_FALSE(error_message.empty());
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// Now the flag is set and it must pass.
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file_deserializer.set_allow_trailing_comma(true);
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value.reset(file_deserializer.Deserialize(&error_code, &error_message));
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ASSERT_TRUE(value.get());
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ASSERT_EQ(JSONReader::JSON_TRAILING_COMMA, error_code);
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// Verify if the same JSON is still there.
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CheckJSONIsStillTheSame(*value);
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}
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TEST(JSONValueSerializerTest, Roundtrip) {
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const std::string original_serialization =
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"{\"bool\":true,\"double\":3.14,\"int\":42,\"list\":[1,2],\"null\":null}";
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JSONStringValueSerializer serializer(original_serialization);
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scoped_ptr<Value> root(serializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(root.get());
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ASSERT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
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DictionaryValue* root_dict = static_cast<DictionaryValue*>(root.get());
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Value* null_value = NULL;
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ASSERT_TRUE(root_dict->Get("null", &null_value));
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ASSERT_TRUE(null_value);
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ASSERT_TRUE(null_value->IsType(Value::TYPE_NULL));
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bool bool_value = false;
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ASSERT_TRUE(root_dict->GetBoolean("bool", &bool_value));
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ASSERT_TRUE(bool_value);
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int int_value = 0;
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ASSERT_TRUE(root_dict->GetInteger("int", &int_value));
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ASSERT_EQ(42, int_value);
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double double_value = 0.0;
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ASSERT_TRUE(root_dict->GetDouble("double", &double_value));
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ASSERT_DOUBLE_EQ(3.14, double_value);
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// We shouldn't be able to write using this serializer, since it was
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// initialized with a const string.
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ASSERT_FALSE(serializer.Serialize(*root_dict));
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std::string test_serialization;
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JSONStringValueSerializer mutable_serializer(&test_serialization);
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ASSERT_TRUE(mutable_serializer.Serialize(*root_dict));
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ASSERT_EQ(original_serialization, test_serialization);
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mutable_serializer.set_pretty_print(true);
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ASSERT_TRUE(mutable_serializer.Serialize(*root_dict));
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// JSON output uses a different newline style on Windows than on other
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// platforms.
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#if defined(OS_WIN)
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#define JSON_NEWLINE "\r\n"
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#else
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#define JSON_NEWLINE "\n"
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#endif
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const std::string pretty_serialization =
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"{" JSON_NEWLINE
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" \"bool\": true," JSON_NEWLINE
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" \"double\": 3.14," JSON_NEWLINE
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" \"int\": 42," JSON_NEWLINE
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" \"list\": [ 1, 2 ]," JSON_NEWLINE
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" \"null\": null" JSON_NEWLINE
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"}" JSON_NEWLINE;
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#undef JSON_NEWLINE
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ASSERT_EQ(pretty_serialization, test_serialization);
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}
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TEST(JSONValueSerializerTest, StringEscape) {
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string16 all_chars;
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for (int i = 1; i < 256; ++i) {
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all_chars += static_cast<char16>(i);
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}
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// Generated in in Firefox using the following js (with an extra backslash for
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// double quote):
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// var s = '';
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// for (var i = 1; i < 256; ++i) { s += String.fromCharCode(i); }
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// uneval(s).replace(/\\/g, "\\\\");
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std::string all_chars_expected =
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"\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007\\b\\t\\n\\u000B\\f\\r"
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"\\u000E\\u000F\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017"
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"\\u0018\\u0019\\u001A\\u001B\\u001C\\u001D\\u001E\\u001F !\\\""
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"#$%&'()*+,-./0123456789:;\\u003C=\\u003E?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\"
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"\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\\u007F\\u0080\\u0081\\u0082\\u0083"
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"\\u0084\\u0085\\u0086\\u0087\\u0088\\u0089\\u008A\\u008B\\u008C\\u008D"
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"\\u008E\\u008F\\u0090\\u0091\\u0092\\u0093\\u0094\\u0095\\u0096\\u0097"
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"\\u0098\\u0099\\u009A\\u009B\\u009C\\u009D\\u009E\\u009F\\u00A0\\u00A1"
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"\\u00A2\\u00A3\\u00A4\\u00A5\\u00A6\\u00A7\\u00A8\\u00A9\\u00AA\\u00AB"
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"\\u00AC\\u00AD\\u00AE\\u00AF\\u00B0\\u00B1\\u00B2\\u00B3\\u00B4\\u00B5"
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"\\u00B6\\u00B7\\u00B8\\u00B9\\u00BA\\u00BB\\u00BC\\u00BD\\u00BE\\u00BF"
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"\\u00C0\\u00C1\\u00C2\\u00C3\\u00C4\\u00C5\\u00C6\\u00C7\\u00C8\\u00C9"
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"\\u00CA\\u00CB\\u00CC\\u00CD\\u00CE\\u00CF\\u00D0\\u00D1\\u00D2\\u00D3"
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"\\u00D4\\u00D5\\u00D6\\u00D7\\u00D8\\u00D9\\u00DA\\u00DB\\u00DC\\u00DD"
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"\\u00DE\\u00DF\\u00E0\\u00E1\\u00E2\\u00E3\\u00E4\\u00E5\\u00E6\\u00E7"
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"\\u00E8\\u00E9\\u00EA\\u00EB\\u00EC\\u00ED\\u00EE\\u00EF\\u00F0\\u00F1"
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"\\u00F2\\u00F3\\u00F4\\u00F5\\u00F6\\u00F7\\u00F8\\u00F9\\u00FA\\u00FB"
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"\\u00FC\\u00FD\\u00FE\\u00FF";
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std::string expected_output = "{\"all_chars\":\"" + all_chars_expected +
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"\"}";
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// Test JSONWriter interface
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std::string output_js;
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DictionaryValue valueRoot;
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valueRoot.SetString("all_chars", all_chars);
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JSONWriter::Write(&valueRoot, &output_js);
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ASSERT_EQ(expected_output, output_js);
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// Test JSONValueSerializer interface (uses JSONWriter).
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JSONStringValueSerializer serializer(&output_js);
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ASSERT_TRUE(serializer.Serialize(valueRoot));
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ASSERT_EQ(expected_output, output_js);
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}
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TEST(JSONValueSerializerTest, UnicodeStrings) {
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// unicode string json -> escaped ascii text
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DictionaryValue root;
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string16 test(WideToUTF16(L"\x7F51\x9875"));
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root.SetString("web", test);
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std::string expected = "{\"web\":\"\\u7F51\\u9875\"}";
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std::string actual;
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JSONStringValueSerializer serializer(&actual);
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ASSERT_TRUE(serializer.Serialize(root));
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ASSERT_EQ(expected, actual);
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// escaped ascii text -> json
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JSONStringValueSerializer deserializer(expected);
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scoped_ptr<Value> deserial_root(deserializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(deserial_root.get());
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DictionaryValue* dict_root =
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static_cast<DictionaryValue*>(deserial_root.get());
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string16 web_value;
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ASSERT_TRUE(dict_root->GetString("web", &web_value));
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ASSERT_EQ(test, web_value);
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}
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TEST(JSONValueSerializerTest, HexStrings) {
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// hex string json -> escaped ascii text
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DictionaryValue root;
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string16 test(WideToUTF16(L"\x01\x02"));
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root.SetString("test", test);
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std::string expected = "{\"test\":\"\\u0001\\u0002\"}";
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std::string actual;
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JSONStringValueSerializer serializer(&actual);
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ASSERT_TRUE(serializer.Serialize(root));
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ASSERT_EQ(expected, actual);
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// escaped ascii text -> json
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JSONStringValueSerializer deserializer(expected);
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scoped_ptr<Value> deserial_root(deserializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(deserial_root.get());
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DictionaryValue* dict_root =
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static_cast<DictionaryValue*>(deserial_root.get());
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string16 test_value;
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ASSERT_TRUE(dict_root->GetString("test", &test_value));
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ASSERT_EQ(test, test_value);
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// Test converting escaped regular chars
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std::string escaped_chars = "{\"test\":\"\\u0067\\u006f\"}";
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JSONStringValueSerializer deserializer2(escaped_chars);
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deserial_root.reset(deserializer2.Deserialize(NULL, NULL));
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ASSERT_TRUE(deserial_root.get());
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dict_root = static_cast<DictionaryValue*>(deserial_root.get());
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ASSERT_TRUE(dict_root->GetString("test", &test_value));
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ASSERT_EQ(ASCIIToUTF16("go"), test_value);
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}
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TEST(JSONValueSerializerTest, AllowTrailingComma) {
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scoped_ptr<Value> root;
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scoped_ptr<Value> root_expected;
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std::string test_with_commas("{\"key\": [true,],}");
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std::string test_no_commas("{\"key\": [true]}");
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JSONStringValueSerializer serializer(test_with_commas);
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serializer.set_allow_trailing_comma(true);
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JSONStringValueSerializer serializer_expected(test_no_commas);
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root.reset(serializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(root.get());
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root_expected.reset(serializer_expected.Deserialize(NULL, NULL));
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ASSERT_TRUE(root_expected.get());
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ASSERT_TRUE(root->Equals(root_expected.get()));
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}
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TEST(JSONValueSerializerTest, JSONReaderComments) {
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ValidateJsonList("[ // 2, 3, ignore me ] \n1 ]");
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ValidateJsonList("[ /* 2, \n3, ignore me ]*/ \n1 ]");
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ValidateJsonList("//header\n[ // 2, \n// 3, \n1 ]// footer");
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ValidateJsonList("/*\n[ // 2, \n// 3, \n1 ]*/[1]");
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ValidateJsonList("[ 1 /* one */ ] /* end */");
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ValidateJsonList("[ 1 //// ,2\r\n ]");
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scoped_ptr<Value> root;
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// It's ok to have a comment in a string.
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root.reset(JSONReader::Read("[\"// ok\\n /* foo */ \"]"));
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ASSERT_TRUE(root.get() && root->IsType(Value::TYPE_LIST));
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ListValue* list = static_cast<ListValue*>(root.get());
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ASSERT_EQ(1U, list->GetSize());
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Value* elt = NULL;
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ASSERT_TRUE(list->Get(0, &elt));
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std::string value;
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ASSERT_TRUE(elt && elt->GetAsString(&value));
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ASSERT_EQ("// ok\n /* foo */ ", value);
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// You can't nest comments.
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root.reset(JSONReader::Read("/* /* inner */ outer */ [ 1 ]"));
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ASSERT_FALSE(root.get());
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// Not a open comment token.
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root.reset(JSONReader::Read("/ * * / [1]"));
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ASSERT_FALSE(root.get());
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}
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class JSONFileValueSerializerTest : public testing::Test {
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protected:
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virtual void SetUp() OVERRIDE {
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ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
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}
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base::ScopedTempDir temp_dir_;
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};
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TEST_F(JSONFileValueSerializerTest, Roundtrip) {
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base::FilePath original_file_path;
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ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &original_file_path));
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original_file_path =
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original_file_path.Append(FILE_PATH_LITERAL("serializer_test.json"));
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ASSERT_TRUE(PathExists(original_file_path));
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JSONFileValueSerializer deserializer(original_file_path);
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scoped_ptr<Value> root;
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root.reset(deserializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(root.get());
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ASSERT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
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DictionaryValue* root_dict = static_cast<DictionaryValue*>(root.get());
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Value* null_value = NULL;
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ASSERT_TRUE(root_dict->Get("null", &null_value));
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ASSERT_TRUE(null_value);
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ASSERT_TRUE(null_value->IsType(Value::TYPE_NULL));
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bool bool_value = false;
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ASSERT_TRUE(root_dict->GetBoolean("bool", &bool_value));
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ASSERT_TRUE(bool_value);
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int int_value = 0;
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ASSERT_TRUE(root_dict->GetInteger("int", &int_value));
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ASSERT_EQ(42, int_value);
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std::string string_value;
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ASSERT_TRUE(root_dict->GetString("string", &string_value));
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ASSERT_EQ("hello", string_value);
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// Now try writing.
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const base::FilePath written_file_path =
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temp_dir_.path().Append(FILE_PATH_LITERAL("test_output.js"));
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ASSERT_FALSE(PathExists(written_file_path));
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JSONFileValueSerializer serializer(written_file_path);
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ASSERT_TRUE(serializer.Serialize(*root));
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ASSERT_TRUE(PathExists(written_file_path));
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// Now compare file contents.
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EXPECT_TRUE(TextContentsEqual(original_file_path, written_file_path));
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EXPECT_TRUE(base::DeleteFile(written_file_path, false));
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}
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TEST_F(JSONFileValueSerializerTest, RoundtripNested) {
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base::FilePath original_file_path;
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ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &original_file_path));
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original_file_path = original_file_path.Append(
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FILE_PATH_LITERAL("serializer_nested_test.json"));
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ASSERT_TRUE(PathExists(original_file_path));
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JSONFileValueSerializer deserializer(original_file_path);
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scoped_ptr<Value> root;
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root.reset(deserializer.Deserialize(NULL, NULL));
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ASSERT_TRUE(root.get());
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|
|
|
// Now try writing.
|
|
base::FilePath written_file_path = temp_dir_.path().Append(
|
|
FILE_PATH_LITERAL("test_output.json"));
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|
|
|
ASSERT_FALSE(PathExists(written_file_path));
|
|
JSONFileValueSerializer serializer(written_file_path);
|
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ASSERT_TRUE(serializer.Serialize(*root));
|
|
ASSERT_TRUE(PathExists(written_file_path));
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|
|
|
// Now compare file contents.
|
|
EXPECT_TRUE(TextContentsEqual(original_file_path, written_file_path));
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|
EXPECT_TRUE(base::DeleteFile(written_file_path, false));
|
|
}
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|
|
|
TEST_F(JSONFileValueSerializerTest, NoWhitespace) {
|
|
base::FilePath source_file_path;
|
|
ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &source_file_path));
|
|
source_file_path = source_file_path.Append(
|
|
FILE_PATH_LITERAL("serializer_test_nowhitespace.json"));
|
|
ASSERT_TRUE(PathExists(source_file_path));
|
|
JSONFileValueSerializer serializer(source_file_path);
|
|
scoped_ptr<Value> root;
|
|
root.reset(serializer.Deserialize(NULL, NULL));
|
|
ASSERT_TRUE(root.get());
|
|
}
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|
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} // namespace
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} // namespace base
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