allwpilib/wpiutil/src/test/native/cpp/json/unit-deserialization.cpp

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/* Modifications Copyright (c) FIRST 2017. All Rights Reserved.               */
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/*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
|  |  |__   |  |  | | | |  version 2.1.1
|_____|_____|_____|_|___|  https://github.com/nlohmann/json

Licensed under the MIT License <http://opensource.org/licenses/MIT>.
Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>.

Permission is hereby  granted, free of charge, to any  person obtaining a copy
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The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
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*/

#include "unit-json.h"

#include <valarray>

#include <gtest/gtest.h>

#include "wpi/raw_istream.h"

using wpi::json;

TEST(JsonDeserializationTest, SuccessfulStream)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}]";
    wpi::raw_mem_istream ss(s.data(), s.size());
    json j = json::parse(ss);
    ASSERT_EQ(j, json({"foo", 1, 2, 3, false, {{"one", 1}}}));
}

TEST(JsonDeserializationTest, SuccessfulStringLiteral)
{
    auto s = "[\"foo\",1,2,3,false,{\"one\":1}]";
    json j = json::parse(s);
    ASSERT_EQ(j, json({"foo", 1, 2, 3, false, {{"one", 1}}}));
}

TEST(JsonDeserializationTest, SuccessfulStdString)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}]";
    json j = json::parse(s);
    ASSERT_EQ(j, json({"foo", 1, 2, 3, false, {{"one", 1}}}));
}

TEST(JsonDeserializationTest, SuccessfulStreamOperator)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}]";
    wpi::raw_mem_istream ss(s.data(), s.size());
    json j;
    ss >> j;
    ASSERT_EQ(j, json({"foo", 1, 2, 3, false, {{"one", 1}}}));
}

TEST(JsonDeserializationTest, SuccessfulUserStringLiteral)
{
    ASSERT_EQ("[\"foo\",1,2,3,false,{\"one\":1}]"_json, json({"foo", 1, 2, 3, false, {{"one", 1}}}));
}

TEST(JsonDeserializationTest, UnsuccessfulStream)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}";
    wpi::raw_mem_istream ss(s.data(), s.size());
    ASSERT_THROW_MSG(json::parse(ss), json::parse_error,
                     "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
}

TEST(JsonDeserializationTest, UnsuccessfulStdString)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}";
    ASSERT_THROW_MSG(json::parse(s), json::parse_error,
                     "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
}

TEST(JsonDeserializationTest, UnsuccessfulStreamOperator)
{
    std::string s = "[\"foo\",1,2,3,false,{\"one\":1}";
    wpi::raw_mem_istream ss(s.data(), s.size());
    json j;
    ASSERT_THROW_MSG(ss >> j, json::parse_error,
                     "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
}

TEST(JsonDeserializationTest, UnsuccessfulUserStringLiteral)
{
    ASSERT_THROW_MSG("[\"foo\",1,2,3,false,{\"one\":1}"_json, json::parse_error,
                     "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
}

// these cases are required for 100% line coverage
class JsonDeserializationErrorTest
    : public ::testing::TestWithParam<const char*> {};

TEST_P(JsonDeserializationErrorTest, ErrorCase)
{
    ASSERT_THROW(json::parse(GetParam()), json::parse_error);
}

static const char* error_cases[] = {
    "\"aaaaaa\\u",
    "\"aaaaaa\\u1",
    "\"aaaaaa\\u11111111",
    "\"aaaaaau11111111\\",
    "\"\x7F\xC1",
    "\"\x7F\xDF\x7F",
    "\"\x7F\xDF\xC0",
    "\"\x7F\xE0\x9F",
    "\"\x7F\xEF\xC0",
    "\"\x7F\xED\x7F",
    "\"\x7F\xF0\x8F",
    "\"\x7F\xF0\xC0",
    "\"\x7F\xF3\x7F",
    "\"\x7F\xF3\xC0",
    "\"\x7F\xF4\x7F",
};

INSTANTIATE_TEST_SUITE_P(JsonDeserializationErrorTests,
                        JsonDeserializationErrorTest,
                        ::testing::ValuesIn(error_cases));