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// 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/json/json_value_converter.h"
#include <string>
#include <vector>
#include "base/values.h"
#include "base/json/json_reader.h"
#include "base/memory/scoped_ptr.h"
#include "base/string_piece.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
// Very simple messages.
struct SimpleMessage {
enum SimpleEnum {
FOO, BAR,
};
int foo;
std::string bar;
bool baz;
SimpleEnum simple_enum;
std::vector<int> ints;
SimpleMessage() : foo(0), baz(false) {}
static bool ParseSimpleEnum(const StringPiece& value, SimpleEnum* field) {
if (value == "foo") {
*field = FOO;
return true;
} else if (value == "bar") {
*field = BAR;
return true;
}
return false;
}
static void RegisterJSONConverter(
base::JSONValueConverter<SimpleMessage>* converter) {
converter->RegisterIntField("foo", &SimpleMessage::foo);
converter->RegisterStringField("bar", &SimpleMessage::bar);
converter->RegisterBoolField("baz", &SimpleMessage::baz);
converter->RegisterCustomField<SimpleEnum>(
"simple_enum", &SimpleMessage::simple_enum, &ParseSimpleEnum);
converter->RegisterRepeatedInt("ints", &SimpleMessage::ints);
}
};
// For nested messages.
struct NestedMessage {
double foo;
SimpleMessage child;
std::vector<SimpleMessage> children;
NestedMessage() : foo(0) {}
static void RegisterJSONConverter(
base::JSONValueConverter<NestedMessage>* converter) {
converter->RegisterDoubleField("foo", &NestedMessage::foo);
converter->RegisterNestedField("child", &NestedMessage::child);
converter->RegisterRepeatedMessage("children", &NestedMessage::children);
}
};
} // namespace
TEST(JSONValueConverterTest, ParseSimpleMessage) {
const char normal_data[] =
"{\n"
" \"foo\": 1,\n"
" \"bar\": \"bar\",\n"
" \"baz\": true,\n"
" \"simple_enum\": \"foo\","
" \"ints\": [1, 2]"
"}\n";
scoped_ptr<Value> value(base::JSONReader::Read(normal_data, false));
SimpleMessage message;
base::JSONValueConverter<SimpleMessage> converter;
EXPECT_TRUE(converter.Convert(*value.get(), &message));
EXPECT_EQ(1, message.foo);
EXPECT_EQ("bar", message.bar);
EXPECT_TRUE(message.baz);
EXPECT_EQ(SimpleMessage::FOO, message.simple_enum);
EXPECT_EQ(2, static_cast<int>(message.ints.size()));
EXPECT_EQ(1, message.ints[0]);
EXPECT_EQ(2, message.ints[1]);
}
TEST(JSONValueConverterTest, ParseNestedMessage) {
const char normal_data[] =
"{\n"
" \"foo\": 1.0,\n"
" \"child\": {\n"
" \"foo\": 1,\n"
" \"bar\": \"bar\",\n"
" \"baz\": true\n"
" },\n"
" \"children\": [{\n"
" \"foo\": 2,\n"
" \"bar\": \"foobar\",\n"
" \"baz\": true\n"
" },\n"
" {\n"
" \"foo\": 3,\n"
" \"bar\": \"barbaz\",\n"
" \"baz\": false\n"
" }]\n"
"}\n";
scoped_ptr<Value> value(base::JSONReader::Read(normal_data, false));
NestedMessage message;
base::JSONValueConverter<NestedMessage> converter;
EXPECT_TRUE(converter.Convert(*value.get(), &message));
EXPECT_EQ(1.0, message.foo);
EXPECT_EQ(1, message.child.foo);
EXPECT_EQ("bar", message.child.bar);
EXPECT_TRUE(message.child.baz);
EXPECT_EQ(2, static_cast<int>(message.children.size()));
const SimpleMessage& first_child = message.children[0];
EXPECT_EQ(2, first_child.foo);
EXPECT_EQ("foobar", first_child.bar);
EXPECT_TRUE(first_child.baz);
const SimpleMessage& second_child = message.children[1];
EXPECT_EQ(3, second_child.foo);
EXPECT_EQ("barbaz", second_child.bar);
EXPECT_FALSE(second_child.baz);
}
TEST(JSONValueConverterTest, ParseFailures) {
const char normal_data[] =
"{\n"
" \"foo\": 1,\n"
" \"bar\": 2,\n" // "bar" is an integer here.
" \"baz\": true,\n"
" \"ints\": [1, 2]"
"}\n";
scoped_ptr<Value> value(base::JSONReader::Read(normal_data, false));
SimpleMessage message;
base::JSONValueConverter<SimpleMessage> converter;
EXPECT_FALSE(converter.Convert(*value.get(), &message));
// Do not check the values below. |message| may be modified during
// Convert() even it fails.
}
TEST(JSONValueConverterTest, ParseWithMissingFields) {
const char normal_data[] =
"{\n"
" \"foo\": 1,\n"
" \"baz\": true,\n"
" \"ints\": [1, 2]"
"}\n";
scoped_ptr<Value> value(base::JSONReader::Read(normal_data, false));
SimpleMessage message;
base::JSONValueConverter<SimpleMessage> converter;
// Convert() still succeeds even if the input doesn't have "bar" field.
EXPECT_TRUE(converter.Convert(*value.get(), &message));
EXPECT_EQ(1, message.foo);
EXPECT_TRUE(message.baz);
EXPECT_EQ(2, static_cast<int>(message.ints.size()));
EXPECT_EQ(1, message.ints[0]);
EXPECT_EQ(2, message.ints[1]);
}
TEST(JSONValueConverterTest, EnumParserFails) {
const char normal_data[] =
"{\n"
" \"foo\": 1,\n"
" \"bar\": \"bar\",\n"
" \"baz\": true,\n"
" \"simple_enum\": \"baz\","
" \"ints\": [1, 2]"
"}\n";
scoped_ptr<Value> value(base::JSONReader::Read(normal_data, false));
SimpleMessage message;
base::JSONValueConverter<SimpleMessage> converter;
EXPECT_FALSE(converter.Convert(*value.get(), &message));
// No check the values as mentioned above.
}
} // namespace base
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