320 lines
10 KiB
C++
320 lines
10 KiB
C++
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// 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 "base/json/json_parser.h"
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#include "base/json/json_reader.h"
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#include "base/memory/scoped_ptr.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 internal {
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class JSONParserTest : public testing::Test {
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public:
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JSONParser* NewTestParser(const std::string& input) {
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JSONParser* parser = new JSONParser(JSON_PARSE_RFC);
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parser->start_pos_ = input.data();
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parser->pos_ = parser->start_pos_;
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parser->end_pos_ = parser->start_pos_ + input.length();
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return parser;
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}
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void TestLastThree(JSONParser* parser) {
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EXPECT_EQ(',', *parser->NextChar());
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EXPECT_EQ('|', *parser->NextChar());
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EXPECT_EQ('\0', *parser->NextChar());
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EXPECT_EQ(parser->end_pos_, parser->pos_);
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}
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};
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TEST_F(JSONParserTest, NextChar) {
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std::string input("Hello world");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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EXPECT_EQ('H', *parser->pos_);
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for (size_t i = 1; i < input.length(); ++i) {
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EXPECT_EQ(input[i], *parser->NextChar());
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}
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EXPECT_EQ(parser->end_pos_, parser->NextChar());
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}
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TEST_F(JSONParserTest, ConsumeString) {
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std::string input("\"test\",|");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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scoped_ptr<Value> value(parser->ConsumeString());
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EXPECT_EQ('"', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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std::string str;
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EXPECT_TRUE(value->GetAsString(&str));
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EXPECT_EQ("test", str);
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}
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TEST_F(JSONParserTest, ConsumeList) {
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std::string input("[true, false],|");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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scoped_ptr<Value> value(parser->ConsumeList());
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EXPECT_EQ(']', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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base::ListValue* list;
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EXPECT_TRUE(value->GetAsList(&list));
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EXPECT_EQ(2u, list->GetSize());
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}
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TEST_F(JSONParserTest, ConsumeDictionary) {
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std::string input("{\"abc\":\"def\"},|");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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scoped_ptr<Value> value(parser->ConsumeDictionary());
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EXPECT_EQ('}', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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base::DictionaryValue* dict;
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EXPECT_TRUE(value->GetAsDictionary(&dict));
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std::string str;
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EXPECT_TRUE(dict->GetString("abc", &str));
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EXPECT_EQ("def", str);
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}
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TEST_F(JSONParserTest, ConsumeLiterals) {
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// Literal |true|.
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std::string input("true,|");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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scoped_ptr<Value> value(parser->ConsumeLiteral());
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EXPECT_EQ('e', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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bool bool_value = false;
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EXPECT_TRUE(value->GetAsBoolean(&bool_value));
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EXPECT_TRUE(bool_value);
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// Literal |false|.
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input = "false,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeLiteral());
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EXPECT_EQ('e', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->GetAsBoolean(&bool_value));
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EXPECT_FALSE(bool_value);
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// Literal |null|.
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input = "null,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeLiteral());
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EXPECT_EQ('l', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->IsType(Value::TYPE_NULL));
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}
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TEST_F(JSONParserTest, ConsumeNumbers) {
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// Integer.
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std::string input("1234,|");
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scoped_ptr<JSONParser> parser(NewTestParser(input));
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scoped_ptr<Value> value(parser->ConsumeNumber());
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EXPECT_EQ('4', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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int number_i;
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EXPECT_TRUE(value->GetAsInteger(&number_i));
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EXPECT_EQ(1234, number_i);
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// Negative integer.
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input = "-1234,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeNumber());
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EXPECT_EQ('4', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->GetAsInteger(&number_i));
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EXPECT_EQ(-1234, number_i);
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// Double.
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input = "12.34,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeNumber());
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EXPECT_EQ('4', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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double number_d;
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EXPECT_TRUE(value->GetAsDouble(&number_d));
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EXPECT_EQ(12.34, number_d);
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// Scientific.
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input = "42e3,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeNumber());
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EXPECT_EQ('3', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->GetAsDouble(&number_d));
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EXPECT_EQ(42000, number_d);
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// Negative scientific.
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input = "314159e-5,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeNumber());
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EXPECT_EQ('5', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->GetAsDouble(&number_d));
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EXPECT_EQ(3.14159, number_d);
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// Positive scientific.
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input = "0.42e+3,|";
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parser.reset(NewTestParser(input));
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value.reset(parser->ConsumeNumber());
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EXPECT_EQ('3', *parser->pos_);
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TestLastThree(parser.get());
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ASSERT_TRUE(value.get());
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EXPECT_TRUE(value->GetAsDouble(&number_d));
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EXPECT_EQ(420, number_d);
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}
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TEST_F(JSONParserTest, ErrorMessages) {
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// Error strings should not be modified in case of success.
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std::string error_message;
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int error_code = 0;
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scoped_ptr<Value> root;
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root.reset(JSONReader::ReadAndReturnError("[42]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_TRUE(error_message.empty());
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EXPECT_EQ(0, error_code);
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// Test line and column counting
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const char big_json[] = "[\n0,\n1,\n2,\n3,4,5,6 7,\n8,\n9\n]";
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// error here ----------------------------------^
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root.reset(JSONReader::ReadAndReturnError(big_json, JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(5, 10, JSONReader::kSyntaxError),
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error_message);
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EXPECT_EQ(JSONReader::JSON_SYNTAX_ERROR, error_code);
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error_code = 0;
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error_message = "";
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// Test line and column counting with "\r\n" line ending
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const char big_json_crlf[] =
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"[\r\n0,\r\n1,\r\n2,\r\n3,4,5,6 7,\r\n8,\r\n9\r\n]";
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// error here ----------------------^
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root.reset(JSONReader::ReadAndReturnError(big_json_crlf, JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(5, 10, JSONReader::kSyntaxError),
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error_message);
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EXPECT_EQ(JSONReader::JSON_SYNTAX_ERROR, error_code);
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// Test each of the error conditions
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root.reset(JSONReader::ReadAndReturnError("{},{}", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 3,
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JSONReader::kUnexpectedDataAfterRoot), error_message);
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EXPECT_EQ(JSONReader::JSON_UNEXPECTED_DATA_AFTER_ROOT, error_code);
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std::string nested_json;
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for (int i = 0; i < 101; ++i) {
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nested_json.insert(nested_json.begin(), '[');
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nested_json.append(1, ']');
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}
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root.reset(JSONReader::ReadAndReturnError(nested_json, JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 100, JSONReader::kTooMuchNesting),
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error_message);
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EXPECT_EQ(JSONReader::JSON_TOO_MUCH_NESTING, error_code);
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root.reset(JSONReader::ReadAndReturnError("[1,]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 4, JSONReader::kTrailingComma),
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error_message);
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EXPECT_EQ(JSONReader::JSON_TRAILING_COMMA, error_code);
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root.reset(JSONReader::ReadAndReturnError("{foo:\"bar\"}", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 2,
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JSONReader::kUnquotedDictionaryKey), error_message);
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EXPECT_EQ(JSONReader::JSON_UNQUOTED_DICTIONARY_KEY, error_code);
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root.reset(JSONReader::ReadAndReturnError("{\"foo\":\"bar\",}",
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JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 14, JSONReader::kTrailingComma),
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error_message);
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root.reset(JSONReader::ReadAndReturnError("[nu]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 2, JSONReader::kSyntaxError),
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error_message);
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EXPECT_EQ(JSONReader::JSON_SYNTAX_ERROR, error_code);
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root.reset(JSONReader::ReadAndReturnError("[\"xxx\\xq\"]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 7, JSONReader::kInvalidEscape),
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error_message);
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EXPECT_EQ(JSONReader::JSON_INVALID_ESCAPE, error_code);
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root.reset(JSONReader::ReadAndReturnError("[\"xxx\\uq\"]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 7, JSONReader::kInvalidEscape),
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error_message);
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EXPECT_EQ(JSONReader::JSON_INVALID_ESCAPE, error_code);
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root.reset(JSONReader::ReadAndReturnError("[\"xxx\\q\"]", JSON_PARSE_RFC,
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&error_code, &error_message));
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EXPECT_FALSE(root.get());
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EXPECT_EQ(JSONParser::FormatErrorMessage(1, 7, JSONReader::kInvalidEscape),
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error_message);
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EXPECT_EQ(JSONReader::JSON_INVALID_ESCAPE, error_code);
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}
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TEST_F(JSONParserTest, Decode4ByteUtf8Char) {
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// This test strings contains a 4 byte unicode character (a smiley!) that the
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// reader should be able to handle (the character is \xf0\x9f\x98\x87).
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const char kUtf8Data[] =
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"[\"😇\",[],[],[],{\"google:suggesttype\":[]}]";
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std::string error_message;
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int error_code = 0;
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scoped_ptr<Value> root(
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JSONReader::ReadAndReturnError(kUtf8Data, JSON_PARSE_RFC, &error_code,
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&error_message));
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EXPECT_TRUE(root.get()) << error_message;
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}
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} // namespace internal
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} // namespace base
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