Files
json/tests/src/unit-binary_utf8_error_handler.cpp
T
Niels Lohmann 374dfe4f0f Keep converted object keys alive while writing UBJSON and BJData (#5791)
* Keep converted object keys alive while writing UBJSON and BJData

Since #5746, write_ubjson and write_ubjson_iterative pass each object key
to sanitize_utf8_for_write and keep the returned reference. When
object_t::key_type is not string_t but converts to it, the argument is a
temporary that is destroyed at the end of the statement, and the
function returns a reference to it in every case but a sanitized copy,
so the key bytes are read from a dead object (AddressSanitizer:
stack-use-after-scope). Default json and ordered_json are unaffected.

Bind the key to a named object_key_string_t first: a reference when
key_type is string_t, so no copy is added there, and a converted copy
otherwise. A deleted overload of sanitize_utf8_for_write for anything
other than string_t turns a recurrence into a compile error.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Suppress -Wunused-member-function for the converting_key test type

converting_key::data() is only called when JSON_DIAGNOSTICS is enabled.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix clang-tidy findings in the UBJSON/BJData converted-key fix

Suppress hicpp/modernize-use-equals-delete on the deleted
sanitize_utf8_for_write overload: it guards a private helper and must stay
private. Replace the C-style array in the new test with std::array.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-10-09 17:05:36 +02:00

530 lines
24 KiB
C++

// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.12.0
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT
#include "doctest_compatibility.h"
#include "test_utils.hpp"
#include <nlohmann/json.hpp>
using nlohmann::json;
#include <array>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
namespace
{
struct ill_formed_case
{
const char* name;
std::string bytes;
};
// RFC 3629 ill-formed sequences used throughout this file, plus one
// well-formed sequence for contrast
std::vector<ill_formed_case> ill_formed_cases()
{
return
{
{"overlong", "\xC0\xAE"},
{"lone_0xFF", "\xFF"},
{"truncated", "\xE2\x82"},
{"surrogate", "\xED\xA0\x80"},
};
}
std::string valid_sequence()
{
return "\xC3\xA9"; // U+00E9, "é"
}
using eh = json::error_handler_t;
std::vector<eh> all_handlers()
{
return {eh::strict, eh::replace, eh::ignore, eh::keep};
}
// what dump()+parse() produces for a sanitizing error_handler; this is the
// ground truth every binary writer/reader is checked against
std::string dump_and_parse(const std::string& raw, eh error_handler)
{
return json::parse(json(raw).dump(-1, ' ', false, error_handler)).get<std::string>();
}
// an object key type that is not string_t, but converts implicitly to it;
// data() is only used when JSON_DIAGNOSTICS is enabled
DOCTEST_CLANG_SUPPRESS_WARNING_PUSH
DOCTEST_CLANG_SUPPRESS_WARNING("-Wunused-member-function")
class converting_key
{
public:
converting_key(const char* s) : m_value(s) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
converting_key(std::string s) : m_value(std::move(s)) {} // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
// the conversion yields a temporary string_t
operator std::string() const // NOLINT(google-explicit-constructor,hicpp-explicit-conversions)
{
return m_value;
}
// read by the exception messages when JSON_DIAGNOSTICS is enabled
const char* data() const noexcept
{
return m_value.data();
}
friend bool operator<(const converting_key& lhs, const converting_key& rhs)
{
return lhs.m_value < rhs.m_value;
}
private:
std::string m_value;
};
DOCTEST_CLANG_SUPPRESS_WARNING_POP
// ObjectType using converting_key; the Key template argument is ignored
template<typename Key, typename Value, typename Compare, typename Allocator>
class converting_key_object : public std::map<converting_key, Value, std::less<converting_key>, // NOLINT(modernize-use-transparent-functors)
typename std::allocator_traits<Allocator>::template rebind_alloc<std::pair<const converting_key, Value>>>
{
using base_type = std::map<converting_key, Value, std::less<converting_key>, // NOLINT(modernize-use-transparent-functors)
typename std::allocator_traits<Allocator>::template rebind_alloc<std::pair<const converting_key, Value>>>;
public:
using base_type::base_type;
using base_type::operator=;
};
using converting_key_json = nlohmann::basic_json<converting_key_object>;
} // namespace
TEST_CASE("UTF-8 error_handler for the binary readers and writers")
{
SECTION("writers: string value")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
const json jval = c.bytes;
CHECK_THROWS_AS(json::to_cbor(jval, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_msgpack(jval, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_ubjson(jval, false, false, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, eh::strict), json::type_error&);
{
json jobj;
jobj["k"] = jval;
CHECK_THROWS_AS(json::to_bson(jobj, eh::strict), json::type_error&);
}
for (const auto h :
{
eh::replace, eh::ignore
})
{
CAPTURE(static_cast<int>(h))
const std::string expected = dump_and_parse(c.bytes, h);
CHECK(json::from_cbor(json::to_cbor(jval, h)).get<std::string>() == expected);
CHECK(json::from_msgpack(json::to_msgpack(jval, h)).get<std::string>() == expected);
CHECK(json::from_ubjson(json::to_ubjson(jval, false, false, h)).get<std::string>() == expected);
CHECK(json::from_bjdata(json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, h)).get<std::string>() == expected);
{
json jobj;
jobj["k"] = jval;
const auto bytes = json::to_bson(jobj, h);
CHECK(json::from_bson(bytes)["k"].get<std::string>() == expected);
}
}
// keep: the writer passes the ill-formed bytes through unchanged,
// exactly as every binary writer did before this parameter existed
CHECK(json::from_cbor(json::to_cbor(jval, eh::keep)).get<std::string>() == c.bytes);
CHECK(json::from_msgpack(json::to_msgpack(jval, eh::keep)).get<std::string>() == c.bytes);
CHECK(json::from_ubjson(json::to_ubjson(jval, false, false, eh::keep)).get<std::string>() == c.bytes);
CHECK(json::from_bjdata(json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, eh::keep)).get<std::string>() == c.bytes);
{
json jobj;
jobj["k"] = jval;
const auto bytes = json::to_bson(jobj, eh::keep);
CHECK(json::from_bson(bytes)["k"].get<std::string>() == c.bytes);
}
}
}
SECTION("writers: object key")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
json jobj;
jobj[c.bytes] = 1;
CHECK_THROWS_AS(json::to_cbor(jobj, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_msgpack(jobj, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_ubjson(jobj, false, false, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_bjdata(jobj, false, false, json::bjdata_version_t::draft2, eh::strict), json::type_error&);
CHECK_THROWS_AS(json::to_bson(jobj, eh::strict), json::type_error&);
for (const auto h :
{
eh::replace, eh::ignore
})
{
CAPTURE(static_cast<int>(h))
const std::string expected = dump_and_parse(c.bytes, h);
CHECK(json::from_cbor(json::to_cbor(jobj, h)).begin().key() == expected);
CHECK(json::from_msgpack(json::to_msgpack(jobj, h)).begin().key() == expected);
CHECK(json::from_ubjson(json::to_ubjson(jobj, false, false, h)).begin().key() == expected);
CHECK(json::from_bjdata(json::to_bjdata(jobj, false, false, json::bjdata_version_t::draft2, h)).begin().key() == expected);
CHECK(json::from_bson(json::to_bson(jobj, h)).begin().key() == expected);
}
// keep: object keys round-trip unchanged too
CHECK(json::from_cbor(json::to_cbor(jobj, eh::keep)).begin().key() == c.bytes);
CHECK(json::from_msgpack(json::to_msgpack(jobj, eh::keep)).begin().key() == c.bytes);
CHECK(json::from_ubjson(json::to_ubjson(jobj, false, false, eh::keep)).begin().key() == c.bytes);
CHECK(json::from_bjdata(json::to_bjdata(jobj, false, false, json::bjdata_version_t::draft2, eh::keep)).begin().key() == c.bytes);
CHECK(json::from_bson(json::to_bson(jobj, eh::keep)).begin().key() == c.bytes);
}
}
SECTION("readers: string value")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
// bytes produced the lenient (keep) way, as any binary reader
// accepted them before this parameter existed
const auto cbor_bytes = json::to_cbor(json(c.bytes), eh::keep);
const auto msgpack_bytes = json::to_msgpack(json(c.bytes)); // to_msgpack has no error_handler; always pass-through
const auto ubjson_bytes = json::to_ubjson(json(c.bytes), false, false, eh::keep);
const auto bjdata_bytes = json::to_bjdata(json(c.bytes), false, false, json::bjdata_version_t::draft2, eh::keep);
const auto bson_bytes = [&c]
{
json jobj;
jobj["k"] = c.bytes;
return json::to_bson(jobj, eh::keep);
}();
// keep (the default): bytes are kept unchanged
CHECK(json::from_cbor(cbor_bytes).get<std::string>() == c.bytes);
CHECK(json::from_msgpack(msgpack_bytes).get<std::string>() == c.bytes);
CHECK(json::from_ubjson(ubjson_bytes).get<std::string>() == c.bytes);
CHECK(json::from_bjdata(bjdata_bytes).get<std::string>() == c.bytes);
CHECK(json::from_bson(bson_bytes)["k"].get<std::string>() == c.bytes);
// strict: parse_error.113, discarded (not thrown) when allow_exceptions is false
CHECK_THROWS_AS(utils::ignore_return_value(json::from_cbor(cbor_bytes, true, true, json::cbor_tag_handler_t::error, eh::strict)), json::parse_error&);
CHECK(json::from_cbor(cbor_bytes, true, false, json::cbor_tag_handler_t::error, eh::strict).is_discarded());
CHECK_THROWS_AS(utils::ignore_return_value(json::from_msgpack(msgpack_bytes, true, true, eh::strict)), json::parse_error&);
CHECK(json::from_msgpack(msgpack_bytes, true, false, eh::strict).is_discarded());
CHECK_THROWS_AS(utils::ignore_return_value(json::from_ubjson(ubjson_bytes, true, true, eh::strict)), json::parse_error&);
CHECK(json::from_ubjson(ubjson_bytes, true, false, eh::strict).is_discarded());
CHECK_THROWS_AS(utils::ignore_return_value(json::from_bjdata(bjdata_bytes, true, true, eh::strict)), json::parse_error&);
CHECK(json::from_bjdata(bjdata_bytes, true, false, eh::strict).is_discarded());
CHECK_THROWS_AS(utils::ignore_return_value(json::from_bson(bson_bytes, true, true, eh::strict)), json::parse_error&);
CHECK(json::from_bson(bson_bytes, true, false, eh::strict).is_discarded());
// replace / ignore: match what dump() would have sanitized the same bytes to
for (const auto h :
{
eh::replace, eh::ignore
})
{
CAPTURE(static_cast<int>(h))
const std::string expected = dump_and_parse(c.bytes, h);
CHECK(json::from_cbor(cbor_bytes, true, true, json::cbor_tag_handler_t::error, h).get<std::string>() == expected);
CHECK(json::from_msgpack(msgpack_bytes, true, true, h).get<std::string>() == expected);
CHECK(json::from_ubjson(ubjson_bytes, true, true, h).get<std::string>() == expected);
CHECK(json::from_bjdata(bjdata_bytes, true, true, h).get<std::string>() == expected);
CHECK(json::from_bson(bson_bytes, true, true, h)["k"].get<std::string>() == expected);
}
}
}
SECTION("readers: object key")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
json jobj;
jobj[c.bytes] = 1;
const auto cbor_bytes = json::to_cbor(jobj, eh::keep);
const auto msgpack_bytes = json::to_msgpack(jobj);
const auto ubjson_bytes = json::to_ubjson(jobj, false, false, eh::keep);
const auto bjdata_bytes = json::to_bjdata(jobj, false, false, json::bjdata_version_t::draft2, eh::keep);
const auto bson_bytes = json::to_bson(jobj, eh::keep);
CHECK(json::from_cbor(cbor_bytes).begin().key() == c.bytes);
CHECK(json::from_msgpack(msgpack_bytes).begin().key() == c.bytes);
CHECK(json::from_ubjson(ubjson_bytes).begin().key() == c.bytes);
CHECK(json::from_bjdata(bjdata_bytes).begin().key() == c.bytes);
CHECK(json::from_bson(bson_bytes).begin().key() == c.bytes);
CHECK_THROWS_AS(utils::ignore_return_value(json::from_cbor(cbor_bytes, true, true, json::cbor_tag_handler_t::error, eh::strict)), json::parse_error&);
CHECK_THROWS_AS(utils::ignore_return_value(json::from_msgpack(msgpack_bytes, true, true, eh::strict)), json::parse_error&);
CHECK_THROWS_AS(utils::ignore_return_value(json::from_ubjson(ubjson_bytes, true, true, eh::strict)), json::parse_error&);
CHECK_THROWS_AS(utils::ignore_return_value(json::from_bjdata(bjdata_bytes, true, true, eh::strict)), json::parse_error&);
CHECK_THROWS_AS(utils::ignore_return_value(json::from_bson(bson_bytes, true, true, eh::strict)), json::parse_error&);
for (const auto h :
{
eh::replace, eh::ignore
})
{
CAPTURE(static_cast<int>(h))
const std::string expected = dump_and_parse(c.bytes, h);
CHECK(json::from_cbor(cbor_bytes, true, true, json::cbor_tag_handler_t::error, h).begin().key() == expected);
CHECK(json::from_msgpack(msgpack_bytes, true, true, h).begin().key() == expected);
CHECK(json::from_ubjson(ubjson_bytes, true, true, h).begin().key() == expected);
CHECK(json::from_bjdata(bjdata_bytes, true, true, h).begin().key() == expected);
CHECK(json::from_bson(bson_bytes, true, true, h).begin().key() == expected);
}
}
}
SECTION("well-formed UTF-8 is unaffected by error_handler")
{
const json jval = valid_sequence();
json jobj;
jobj[valid_sequence()] = valid_sequence();
for (const auto h : all_handlers())
{
CAPTURE(static_cast<int>(h))
CHECK(json::from_cbor(json::to_cbor(jval, h)).get<std::string>() == valid_sequence());
CHECK(json::from_msgpack(json::to_msgpack(jval, h)).get<std::string>() == valid_sequence());
CHECK(json::from_ubjson(json::to_ubjson(jval, false, false, h)).get<std::string>() == valid_sequence());
CHECK(json::from_bjdata(json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, h)).get<std::string>() == valid_sequence());
CHECK(json::from_bson(json::to_bson(jobj, h)).begin().key() == valid_sequence());
CHECK(json::from_cbor(json::to_cbor(jval, eh::keep), true, true, json::cbor_tag_handler_t::error, h).get<std::string>() == valid_sequence());
CHECK(json::from_msgpack(json::to_msgpack(jval), true, true, h).get<std::string>() == valid_sequence());
}
}
SECTION("dump() with error_handler_t::keep writes raw bytes as is")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
const json jval = c.bytes;
const std::string dumped = jval.dump(-1, ' ', false, eh::keep);
CHECK(dumped.find(c.bytes) != std::string::npos);
// even with ensure_ascii, the ill-formed bytes are written as is
const std::string dumped_ascii = jval.dump(-1, ' ', true, eh::keep);
CHECK(dumped_ascii.find(c.bytes) != std::string::npos);
}
// well-formed characters around an ill-formed sequence are still
// escaped as usual under ensure_ascii
const json mixed = valid_sequence() + ill_formed_cases()[1].bytes; // "é" + lone 0xFF
const std::string dumped_mixed = mixed.dump(-1, ' ', true, eh::keep);
CHECK(dumped_mixed.find("\\u00e9") != std::string::npos);
CHECK(dumped_mixed.find(ill_formed_cases()[1].bytes) != std::string::npos);
// the byte that ends an ill-formed sequence is read again, so a quote,
// a backslash, or a control character after it is still escaped, and
// a well-formed code point after it is escaped under ensure_ascii
for (const bool ensure_ascii :
{
false, true
})
{
CAPTURE(ensure_ascii)
CHECK(json("\xC3\"").dump(-1, ' ', ensure_ascii, eh::keep) == "\"\xC3\\\"\"");
CHECK(json("\xC3\\").dump(-1, ' ', ensure_ascii, eh::keep) == "\"\xC3\\\\\"");
CHECK(json("\xC3\n").dump(-1, ' ', ensure_ascii, eh::keep) == "\"\xC3\\n\"");
CHECK(json("\xE2\x82\"").dump(-1, ' ', ensure_ascii, eh::keep) == "\"\xE2\x82\\\"\"");
CHECK(json("\xFF\"").dump(-1, ' ', ensure_ascii, eh::keep) == "\"\xFF\\\"\"");
CHECK(json("a\xE2\x82").dump(-1, ' ', ensure_ascii, eh::keep) == "\"a\xE2\x82\"");
}
CHECK(json("\xC3\xC3\xA9").dump(-1, ' ', false, eh::keep) == "\"\xC3\xC3\xA9\"");
CHECK(json("\xC3\xC3\xA9").dump(-1, ' ', true, eh::keep) == "\"\xC3\\u00e9\"");
}
SECTION("to_msgpack defaults to keep; to_bon8 is not affected by error_handler")
{
const json jval = ill_formed_cases()[1].bytes; // lone 0xFF
// to_msgpack's error_handler defaults to keep, as MessagePack's spec
// allows any bytes in a str, so the bytes are passed through
CHECK(json::to_msgpack(jval) == json::to_msgpack(jval, eh::keep));
CHECK(json::from_msgpack(json::to_msgpack(jval)).get<std::string>() == ill_formed_cases()[1].bytes);
// the diagnostics context of an ill-formed key is the object
json jobj;
jobj["\xFF"] = 1;
CHECK_THROWS_WITH_AS(json::to_msgpack(jobj, eh::strict), "[json.exception.type_error.316] invalid UTF-8 byte at index 0: 0xFF", json::type_error&);
// to_bon8 has no error_handler parameter; UTF-8 is structural for
// BON8, so it always rejects ill-formed input
CHECK_THROWS_AS(json::to_bon8(jval), json::type_error&);
}
SECTION("allow_exceptions=false with error_handler_t::strict discards the value")
{
const auto bytes = json::to_cbor(json(ill_formed_cases()[0].bytes), eh::keep);
const json result = json::from_cbor(bytes, true, false, json::cbor_tag_handler_t::error, eh::strict);
CHECK(result.is_discarded());
}
SECTION("default parameters are unchanged")
{
const json jval = ill_formed_cases()[0].bytes;
// to_*: the default error_handler is keep, so ill-formed bytes are
// written unchanged, exactly as in release 3.12.0 (it is strict only
// if JSON_STRICT_BINARY_UTF8 is enabled, see
// unit-binary_utf8_strict.cpp)
CHECK(json::to_cbor(jval) == json::to_cbor(jval, eh::keep));
CHECK(json::to_ubjson(jval) == json::to_ubjson(jval, false, false, eh::keep));
CHECK(json::to_bjdata(jval) == json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, eh::keep));
{
json jobj;
jobj["k"] = jval;
CHECK(json::to_bson(jobj) == json::to_bson(jobj, eh::keep));
}
// from_*: the default error_handler is keep, so ill-formed bytes are
// still accepted unchanged, exactly as in release 3.12.0
const auto cbor_bytes = json::to_cbor(jval, eh::keep);
CHECK(json::from_cbor(cbor_bytes).get<std::string>() == ill_formed_cases()[0].bytes);
const auto ubjson_bytes = json::to_ubjson(jval, false, false, eh::keep);
CHECK(json::from_ubjson(ubjson_bytes).get<std::string>() == ill_formed_cases()[0].bytes);
const auto bjdata_bytes = json::to_bjdata(jval, false, false, json::bjdata_version_t::draft2, eh::keep);
CHECK(json::from_bjdata(bjdata_bytes).get<std::string>() == ill_formed_cases()[0].bytes);
const auto msgpack_bytes = json::to_msgpack(jval);
CHECK(json::from_msgpack(msgpack_bytes).get<std::string>() == ill_formed_cases()[0].bytes);
json bson_obj;
bson_obj["k"] = jval;
const auto bson_bytes = json::to_bson(bson_obj, eh::keep);
CHECK(json::from_bson(bson_bytes)["k"].get<std::string>() == ill_formed_cases()[0].bytes);
}
}
// The UBJSON and BJData writers bind the (possibly sanitized) key to a const
// string_t&. If key_type is not string_t but converts to it, the converted
// temporary must outlive that reference; this was a use-after-scope found by
// AddressSanitizer. Keys exceed the small string optimization on purpose.
TEST_CASE("UBJSON and BJData writers with an object_t whose key_type is not string_t")
{
const std::string long_prefix(70, 'k');
SECTION("well-formed keys, every error_handler")
{
const std::string key1 = long_prefix + "-first";
const std::string key2 = long_prefix + "-second";
converting_key_json::object_t o;
o.emplace(converting_key(key1), 1);
o.emplace(converting_key(key2), "value");
const converting_key_json v(std::move(o));
json expected;
expected[key1] = 1;
expected[key2] = "value";
const std::array<std::pair<bool, bool>, 3> combos = {{{false, false}, {true, false}, {true, true}}};
for (const auto h : all_handlers())
{
CAPTURE(static_cast<int>(h))
for (const auto& combo : combos)
{
const bool use_count = combo.first;
const bool use_type = combo.second;
CAPTURE(use_count)
CAPTURE(use_type)
CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, use_count, use_type, h)) == expected);
CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, use_type, json::bjdata_version_t::draft2, h)) == expected);
CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, use_type, json::bjdata_version_t::draft3, h)) == expected);
}
}
}
SECTION("ill-formed keys")
{
for (const auto& c : ill_formed_cases())
{
CAPTURE(c.name)
const std::string key = long_prefix + c.bytes;
converting_key_json::object_t o;
o.emplace(converting_key(key), 1);
const converting_key_json v(std::move(o));
CHECK_THROWS_AS(converting_key_json::to_ubjson(v, false, false, eh::strict), converting_key_json::type_error&);
CHECK_THROWS_AS(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, eh::strict), converting_key_json::type_error&);
for (const auto h :
{
eh::replace, eh::ignore
})
{
CAPTURE(static_cast<int>(h))
const std::string expected = dump_and_parse(key, h);
CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, false, false, h)).begin().key() == expected);
CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, h)).begin().key() == expected);
}
CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, false, false, eh::keep)).begin().key() == key);
CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, false, false, json::bjdata_version_t::draft2, eh::keep)).begin().key() == key);
}
}
SECTION("nested deeper than the recursion limit")
{
// wrap the previous value, innermost first
converting_key_json v = 42;
json expected = 42;
for (int i = 199; i >= 0; --i)
{
const std::string key = "level-" + std::to_string(i) + "-" + std::string(64, 'x');
converting_key_json::object_t o;
o.emplace(converting_key(key), std::move(v));
v = converting_key_json(std::move(o));
json e;
e[key] = std::move(expected);
expected = std::move(e);
}
for (const auto h : all_handlers())
{
CAPTURE(static_cast<int>(h))
for (const bool use_count :
{
false, true
})
{
CAPTURE(use_count)
CHECK(json::from_ubjson(converting_key_json::to_ubjson(v, use_count, false, h)) == expected);
CHECK(json::from_bjdata(converting_key_json::to_bjdata(v, use_count, false, json::bjdata_version_t::draft2, h)) == expected);
}
}
}
}