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/***
* Copyright (C) Microsoft. All rights reserved.
* Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
*
* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
*
* json_numbers_tests.cpp
*
* Tests parsing numbers and json::number class
*
* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
****/
#include "cpprest/json.h"
#include "unittestpp.h"
#include <clocale>
#include <iomanip>
using namespace web;
using namespace utility;
namespace tests
{
namespace functional
{
namespace json_tests
{
SUITE(json_numbers_tests)
{
TEST(numbers)
{
json::value num = json::value::parse(U("-22"));
VERIFY_ARE_EQUAL(-22, num.as_double());
VERIFY_ARE_EQUAL(-22, num.as_integer());
num = json::value::parse(U("-1.45E2"));
VERIFY_IS_TRUE(num.is_number());
num = json::value::parse(U("-1.45E+1"));
VERIFY_IS_TRUE(num.is_number());
num = json::value::parse(U("-1.45E-10"));
VERIFY_IS_TRUE(num.is_number());
num = json::value::parse(U("1e01"));
VERIFY_IS_TRUE(num.is_number());
}
// Test both positive and negative number
void test_int64(int64_t number)
{
stringstream_t ss;
ss << number;
json::value num = json::value::parse(ss);
VERIFY_ARE_EQUAL(number, num.as_number().to_int64());
VERIFY_IS_TRUE(num.is_integer());
num = json::value::number(number);
VERIFY_ARE_EQUAL(number, num.as_number().to_int64());
VERIFY_IS_TRUE(num.is_integer());
// Check that the number is convertible to signed int64
VERIFY_IS_TRUE(num.as_number().is_int64());
// Check for other integral conversions
VERIFY_ARE_EQUAL(number >= INT_MIN && number <= INT_MAX, num.as_number().is_int32());
VERIFY_ARE_EQUAL(number >= 0 && number <= UINT_MAX, num.as_number().is_uint32());
VERIFY_ARE_EQUAL(number >= 0, num.as_number().is_uint64());
}
TEST(parse_int64)
{
// Negative limits
test_int64(int64_t(LLONG_MIN));
test_int64(int64_t(LLONG_MIN) + 1);
test_int64(int64_t(INT_MIN) - 1);
test_int64(int64_t(INT_MIN));
test_int64(int64_t(INT_MIN) + 1);
// Around zero
test_int64(int64_t(-1));
test_int64(int64_t(0));
test_int64(int64_t(1));
// Positive limits
test_int64(int64_t(INT_MAX));
test_int64(int64_t(INT_MAX) + 1);
test_int64(int64_t(UINT_MAX));
test_int64(int64_t(UINT_MAX) + 1);
// Outside 32-bits limits
test_int64(int64_t(INT_MAX) * 13 + 5); // a number out of the int32 range
test_int64(uint64_t(LLONG_MAX / 2));
}
void test_int64(uint64_t number)
{
stringstream_t ss;
ss << number;
json::value num = json::value::parse(ss);
VERIFY_ARE_EQUAL(number, num.as_number().to_uint64());
VERIFY_IS_TRUE(num.is_integer());
num = json::value::number(number);
VERIFY_ARE_EQUAL(number, num.as_number().to_uint64());
VERIFY_IS_TRUE(num.is_integer());
// Check that the number is convertible to unsigned int64
VERIFY_IS_TRUE(num.as_number().is_uint64());
// Check for other integral conversions
VERIFY_ARE_EQUAL(number <= INT_MAX, num.as_number().is_int32());
VERIFY_ARE_EQUAL(number <= UINT_MAX, num.as_number().is_uint32());
VERIFY_ARE_EQUAL(number <= LLONG_MAX, num.as_number().is_int64());
}
TEST(parse_uint64)
{
test_int64(int64_t(0));
test_int64(int64_t(1));
test_int64(uint64_t(LLONG_MAX) - 1);
test_int64(uint64_t(LLONG_MAX));
test_int64(uint64_t(LLONG_MAX) + 1);
test_int64(uint64_t(ULLONG_MAX));
test_int64(uint64_t(ULLONG_MAX) - 1);
}
const int DOUBLE_DIGITS =
std::numeric_limits<double>::digits10 +
7; // 7 = length of "1." and "e+123" which is the begining and the end of the double representation
void test_double(double number, string_t str_rep)
{
stringstream_t ss;
ss << str_rep;
json::value num = json::value::parse(ss);
VERIFY_ARE_EQUAL(number, num.as_double());
VERIFY_ARE_EQUAL(number, num.as_number().to_double());
// If the number is within integral types limit and not decimal, it should be stored as one of the integral
// types
VERIFY_ARE_EQUAL(number > LLONG_MIN && number < ULLONG_MAX && number == floor(number), num.is_integer());
// If it is outside the range, these methods should return false.
// Note that at this point there is no guarantee that the number was stored as double.
if (number < INT_MIN || number > INT_MAX || number != floor(number))
VERIFY_IS_FALSE(num.as_number().is_int32());
if (number < 0 || number > UINT_MAX || number != floor(number)) VERIFY_IS_FALSE(num.as_number().is_uint32());
if (number < LLONG_MIN || number > LLONG_MAX || number != floor(number))
VERIFY_IS_FALSE(num.as_number().is_int64());
if (number < 0 || number > ULLONG_MAX || number != floor(number)) VERIFY_IS_FALSE(num.as_number().is_uint64());
}
void test_double(double d)
{
::std::basic_stringstream<string_t::value_type> ss;
ss << ::std::setprecision(DOUBLE_DIGITS);
ss << d;
test_double(d, ss.str());
}
TEST(parsing_doubles_into_longs)
{
test_double(2.0);
test_double(pow(2.0, 10.0));
test_double(pow(2.0, 20.0));
test_double(pow(2.0, 60.0));
test_double(pow(2.0, 63.0));
}
TEST(parsing_doubles)
{
test_double(3.14);
test_double(-9.81);
// Note: this should not parse to a ullong because of rounding
test_double(static_cast<double>(ULLONG_MAX));
test_double(0 - static_cast<double>(ULLONG_MAX));
test_double(static_cast<double>(ULLONG_MAX) +
(2 << (64 - 52))); // the lowest number that will be represented as double due to overflowing
// unsigned int64 (52bits fraction in double-precision)
test_double(0 - pow(2.0, 63.0) * 1.5); // between 0-ULLONG_MAX and LLONGMIN
}
TEST(parsing_doubles_setlocale,
"Ignore:Android",
"Locale not supported on Android",
"Ignore:Linux",
"Fails due to double conversion issues",
"Ignore:Apple",
"Fails due to double conversion issues")
{
// JSON uses the C locale always and should therefore not be impacted by the process locale
#ifdef _WIN32
std::string changedLocale("fr-FR");
#else
std::string changedLocale("fr_FR.UTF-8");
#endif
// If locale isn't installed on system just silently pass.
if (setlocale(LC_ALL, changedLocale.c_str()) != nullptr)
{
test_double(1.91563);
test_double(2.0e93);
setlocale(LC_ALL, "C");
}
}
TEST(parsing_very_large_doubles)
{
test_double(pow(2.0, 64.0));
test_double(pow(2.0, 70.0));
test_double(pow(2.0, 80.0));
test_double(pow(2.0, 120.0));
test_double(pow(2.0, 240.0));
test_double(pow(2.0, 300.0));
}
TEST(parsing_very_small_doubles)
{
test_double(2.34e-308);
test_double(1e-308);
}
void test_integral(int number)
{
stringstream_t ss;
ss << number;
json::value num = json::value::parse(ss);
VERIFY_IS_TRUE(num.as_number().is_int32());
VERIFY_IS_TRUE(num.as_number().is_uint32());
VERIFY_IS_TRUE(num.as_number().is_int64());
VERIFY_IS_TRUE(num.as_number().is_uint64());
VERIFY_ARE_EQUAL(number, num.as_number().to_int32());
VERIFY_ARE_EQUAL(number, num.as_number().to_uint32());
VERIFY_ARE_EQUAL(number, num.as_number().to_int64());
VERIFY_ARE_EQUAL(number, num.as_number().to_uint64());
}
TEST(parsing_integral_types)
{
test_integral(0);
test_integral(1);
test_integral(INT_MAX / 2);
test_integral(INT_MAX);
}
TEST(int_double_limits)
{
utility::stringstream_t stream(utility::stringstream_t::in | utility::stringstream_t::out);
utility::stringstream_t oracleStream(utility::stringstream_t::in | utility::stringstream_t::out);
// unsigned int64 max
oracleStream.precision(std::numeric_limits<uint64_t>::digits10 + 2);
oracleStream << (std::numeric_limits<uint64_t>::max)();
json::value iMax((std::numeric_limits<uint64_t>::max)());
VERIFY_ARE_EQUAL(oracleStream.str(), iMax.serialize());
iMax.serialize(stream);
VERIFY_ARE_EQUAL(oracleStream.str(), stream.str());
// signed int64 min
stream.str(U(""));
oracleStream.str(U(""));
oracleStream.clear();
oracleStream << (std::numeric_limits<int64_t>::min)();
json::value iMin((std::numeric_limits<int64_t>::min)());
VERIFY_ARE_EQUAL(oracleStream.str(), iMin.serialize());
iMin.serialize(stream);
VERIFY_ARE_EQUAL(oracleStream.str(), stream.str());
// double max
stream.str(U(""));
oracleStream.str(U(""));
oracleStream.precision(std::numeric_limits<double>::digits10 + 2);
oracleStream << (std::numeric_limits<double>::max)();
json::value dMax((std::numeric_limits<double>::max)());
VERIFY_ARE_EQUAL(oracleStream.str(), dMax.serialize());
dMax.serialize(stream);
VERIFY_ARE_EQUAL(oracleStream.str(), stream.str());
// double min
stream.str(U(""));
oracleStream.str(U(""));
oracleStream << (std::numeric_limits<double>::min)();
json::value dMin((std::numeric_limits<double>::min)());
VERIFY_ARE_EQUAL(oracleStream.str(), dMin.serialize());
dMin.serialize(stream);
VERIFY_ARE_EQUAL(oracleStream.str(), stream.str());
}
TEST(compare_numbers)
{
// Make sure these are equal
VERIFY_ARE_EQUAL(json::value(3.14), json::value::parse(U("3.14")));
VERIFY_ARE_EQUAL(json::value(uint64_t(1234)), json::value::parse(U("1234")));
VERIFY_ARE_EQUAL(json::value(uint32_t(10)), json::value::parse(U("10")));
// These two are to verify that explicitly stated signed int was stored as unsigned int as we store all
// non-negative numbers as unsigned int
VERIFY_ARE_EQUAL(json::value(int32_t(10)), json::value::parse(U("10")));
VERIFY_ARE_EQUAL(json::value(int64_t(1234)), json::value::parse(U("1234")));
// These numbers would be equal if converted to double first. That is how we compared them before we had int64
// support.
VERIFY_ARE_NOT_EQUAL(json::value(int64_t(LLONG_MIN)), json::value(int64_t(LLONG_MIN + 1)));
VERIFY_ARE_NOT_EQUAL(json::value(uint64_t(ULLONG_MAX)), json::value(uint64_t(ULLONG_MAX - 1)));
// Checking boundary condition - zero
VERIFY_ARE_EQUAL(json::value(int32_t(0)), json::value::parse(U("-0")));
VERIFY_ARE_EQUAL(json::value(int64_t(0)), json::value::parse(U("-0")));
VERIFY_ARE_EQUAL(json::value::parse(U("0")), json::value::parse(U("-0")));
}
} // SUITE(json_numbers_tests)
} // namespace json_tests
} // namespace functional
} // namespace tests
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