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iterator.cpp
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iterator.cpp
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////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2020-2022 Vladislav Trifochkin
//
// This file is part of `jeyson-lib`.
//
// Changelog:
// 2020.04.15 Initial version (pfs-json).
// 2022.02.07 Initial version (jeyson-lib).
// 2022.09.26 Refactored.
// 2024.03.31 Refactored based on tests from nlohmann/json repository.
////////////////////////////////////////////////////////////////////////////////
#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include "doctest.h"
#include "pfs/jeyson/json.hpp"
#include "pfs/jeyson/backend/jansson.hpp"
template <typename Backend>
void run_iterator_tests ()
{
using json = jeyson::json<Backend>;
SUBCASE("basic behavior") {
SUBCASE("uninitialized") {
json j;
typename json::iterator it;
typename json::const_iterator cit;
}
SUBCASE("boolean") {
json j {true};
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it = j.begin();
CHECK(it != j.end());
CHECK(*it == j);
it++;
CHECK(it != j.begin());
CHECK(it == j.end());
it--;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
++it;
CHECK(it != j.begin());
CHECK(it == j.end());
--it;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
}
SUBCASE("const json + begin/end") {
typename json::const_iterator it = j_const.begin();
CHECK(it != j_const.end());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
it--;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
--it;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
}
SUBCASE("json + cbegin/cend") {
typename json::const_iterator it = j.cbegin();
CHECK(it != j.cend());
CHECK(*it == j);
it++;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
it--;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
++it;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
--it;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
}
SUBCASE("const json + cbegin/cend") {
typename json::const_iterator it = j_const.cbegin();
CHECK(it != j_const.cend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
it--;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
--it;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
}
SUBCASE("json + rbegin/rend") {
typename json::reverse_iterator it = j.rbegin();
CHECK(it != j.rend());
CHECK(*it == j);
it++;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
it--;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
++it;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
--it;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
}
SUBCASE("json + crbegin/crend") {
typename json::const_reverse_iterator it = j.crbegin();
CHECK(it != j.crend());
CHECK(*it == j);
it++;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
it--;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
++it;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
--it;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
}
SUBCASE("const json + crbegin/crend") {
typename json::const_reverse_iterator it = j_const.crbegin();
CHECK(it != j_const.crend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
it--;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
--it;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
}
SUBCASE("additional tests") {
SUBCASE("!(begin != begin)") {
CHECK(!(j.begin() != j.begin()));
}
SUBCASE("!(end != end)") {
CHECK(!(j.end() != j.end()));
}
}
SUBCASE("key/value") {
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_WITH_AS(it.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(it.value() == json(true));
CHECK_THROWS_WITH_AS(cit.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(cit.value() == json(true));
auto rit = j.rend();
auto crit = j.crend();
CHECK_THROWS_WITH_AS(rit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(rit.base().value() == json(true));
CHECK_THROWS_WITH_AS(crit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(crit.base().value() == json(true));
}
}
SUBCASE("string") {
json j {"hello world"};
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it = j.begin();
CHECK(it != j.end());
CHECK(*it == j);
it++;
CHECK(it != j.begin());
CHECK(it == j.end());
it--;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
++it;
CHECK(it != j.begin());
CHECK(it == j.end());
--it;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
}
SUBCASE("const json + begin/end") {
typename json::const_iterator it = j_const.begin();
CHECK(it != j_const.end());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
it--;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
--it;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
}
SUBCASE("json + cbegin/cend") {
typename json::const_iterator it = j.cbegin();
CHECK(it != j.cend());
CHECK(*it == j);
it++;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
it--;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
++it;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
--it;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
}
SUBCASE("const json + cbegin/cend") {
typename json::const_iterator it = j_const.cbegin();
CHECK(it != j_const.cend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
it--;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
--it;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
}
SUBCASE("json + rbegin/rend") {
typename json::reverse_iterator it = j.rbegin();
CHECK(it != j.rend());
CHECK(*it == j);
it++;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
it--;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
++it;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
--it;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
}
SUBCASE("json + crbegin/crend") {
typename json::const_reverse_iterator it = j.crbegin();
CHECK(it != j.crend());
CHECK(*it == j);
it++;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
it--;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
++it;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
--it;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
}
SUBCASE("const json + crbegin/crend") {
typename json::const_reverse_iterator it = j_const.crbegin();
CHECK(it != j_const.crend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
it--;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
--it;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
}
SUBCASE("key/value") {
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_WITH_AS(it.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(it.value() == json("hello world"));
CHECK_THROWS_WITH_AS(cit.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(cit.value() == json("hello world"));
auto rit = j.rend();
auto crit = j.crend();
CHECK_THROWS_WITH_AS(rit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(rit.base().value() == json("hello world"));
CHECK_THROWS_WITH_AS(crit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(crit.base().value() == json("hello world"));
}
}
SUBCASE("array") {
json j;
j.push_back(1);
j.push_back(2);
j.push_back(3);
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it_begin = j.begin();
typename json::iterator it_end = j.end();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[0]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[2]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("const json + begin/end") {
typename json::const_iterator it_begin = j_const.begin();
typename json::const_iterator it_end = j_const.end();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j_const[0]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const[2]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("json + cbegin/cend") {
typename json::const_iterator it_begin = j.cbegin();
typename json::const_iterator it_end = j.cend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[0]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[2]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("const json + cbegin/cend") {
typename json::const_iterator it_begin = j_const.cbegin();
typename json::const_iterator it_end = j_const.cend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[0]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[2]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("json + rbegin/rend") {
typename json::reverse_iterator it_begin = j.rbegin();
typename json::reverse_iterator it_end = j.rend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[2]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[0]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("json + crbegin/crend") {
typename json::const_reverse_iterator it_begin = j.crbegin();
typename json::const_reverse_iterator it_end = j.crend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[2]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[0]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("const json + crbegin/crend") {
typename json::const_reverse_iterator it_begin = j_const.crbegin();
typename json::const_reverse_iterator it_end = j_const.crend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j[2]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[1]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j[0]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("key/value") {
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_WITH_AS(it.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(it.value() == json(1));
CHECK_THROWS_WITH_AS(cit.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(cit.value() == json(1));
}
}
SUBCASE("object") {
json j;
j.insert("A", 1);
j.insert("B", 2);
j.insert("C", 3);
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it_begin = j.begin();
typename json::iterator it_end = j.end();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j["A"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["C"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("const json + begin/end") {
typename json::const_iterator it_begin = j_const.begin();
typename json::const_iterator it_end = j_const.end();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j_const["A"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const["C"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("json + cbegin/cend") {
typename json::const_iterator it_begin = j.cbegin();
typename json::const_iterator it_end = j.cend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j["A"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["C"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("const json + cbegin/cend") {
typename json::const_iterator it_begin = j_const.cbegin();
typename json::const_iterator it_end = j_const.cend();
auto it = it_begin;
CHECK(it != it_end);
CHECK(*it == j_const["A"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j_const["C"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
SUBCASE("json + rbegin/rend") {
typename json::reverse_iterator it_begin = j.rbegin();
typename json::reverse_iterator it_end = j.rend();
auto it = it_begin;
CHECK(it != it_end);
if (it.base().decrement_support()) {
CHECK(*it == j["C"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["A"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
}
SUBCASE("json + crbegin/crend") {
typename json::const_reverse_iterator it_begin = j.crbegin();
typename json::const_reverse_iterator it_end = j.crend();
auto it = it_begin;
CHECK(it != it_end);
if (it.base().decrement_support()) {
CHECK(*it == j["C"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["A"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
}
SUBCASE("const json + crbegin/crend") {
typename json::const_reverse_iterator it_begin = j_const.crbegin();
typename json::const_reverse_iterator it_end = j_const.crend();
auto it = it_begin;
CHECK(it != it_end);
if (it.base().decrement_support()) {
CHECK(*it == j["C"]);
it++;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["B"]);
++it;
CHECK(it != it_begin);
CHECK(it != it_end);
CHECK(*it == j["A"]);
++it;
CHECK(it != it_begin);
CHECK(it == it_end);
}
}
SUBCASE("key/value") {
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK(it.key() == "A");
CHECK(it.value() == json(1));
CHECK(cit.key() == "A");
CHECK(cit.value() == json(1));
}
}
SUBCASE("number (integer)") {
json j {23};
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it = j.begin();
CHECK(it != j.end());
CHECK(*it == j);
it++;
CHECK(it != j.begin());
CHECK(it == j.end());
it--;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
++it;
CHECK(it != j.begin());
CHECK(it == j.end());
--it;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
}
SUBCASE("const json + begin/end") {
typename json::const_iterator it = j_const.begin();
CHECK(it != j_const.end());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
it--;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.begin());
CHECK(it == j_const.end());
--it;
CHECK(it == j_const.begin());
CHECK(it != j_const.end());
CHECK(*it == j_const);
}
SUBCASE("json + cbegin/cend") {
typename json::const_iterator it = j.cbegin();
CHECK(it != j.cend());
CHECK(*it == j);
it++;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
it--;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
++it;
CHECK(it != j.cbegin());
CHECK(it == j.cend());
--it;
CHECK(it == j.cbegin());
CHECK(it != j.cend());
CHECK(*it == j);
}
SUBCASE("const json + cbegin/cend") {
typename json::const_iterator it = j_const.cbegin();
CHECK(it != j_const.cend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
it--;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.cbegin());
CHECK(it == j_const.cend());
--it;
CHECK(it == j_const.cbegin());
CHECK(it != j_const.cend());
CHECK(*it == j_const);
}
SUBCASE("json + rbegin/rend") {
typename json::reverse_iterator it = j.rbegin();
CHECK(it != j.rend());
CHECK(*it == j);
it++;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
it--;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
++it;
CHECK(it != j.rbegin());
CHECK(it == j.rend());
--it;
CHECK(it == j.rbegin());
CHECK(it != j.rend());
CHECK(*it == j);
}
SUBCASE("json + crbegin/crend") {
typename json::const_reverse_iterator it = j.crbegin();
CHECK(it != j.crend());
CHECK(*it == j);
it++;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
it--;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
++it;
CHECK(it != j.crbegin());
CHECK(it == j.crend());
--it;
CHECK(it == j.crbegin());
CHECK(it != j.crend());
CHECK(*it == j);
}
SUBCASE("const json + crbegin/crend") {
typename json::const_reverse_iterator it = j_const.crbegin();
CHECK(it != j_const.crend());
CHECK(*it == j_const);
it++;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
it--;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
++it;
CHECK(it != j_const.crbegin());
CHECK(it == j_const.crend());
--it;
CHECK(it == j_const.crbegin());
CHECK(it != j_const.crend());
CHECK(*it == j_const);
}
SUBCASE("key/value") {
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_WITH_AS(it.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(it.value() == json(42));
CHECK_THROWS_WITH_AS(cit.key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(cit.value() == json(42));
auto rit = j.rend();
auto crit = j.crend();
CHECK_THROWS_WITH_AS(rit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(rit.base().value() == json(42));
CHECK_THROWS_WITH_AS(crit.base().key(), make_error_code(jeyson::errc::incopatible_type).message().c_str(), jeyson::error);
CHECK(crit.base().value() == json(42));
}
}
SUBCASE("number (real)") {
json j {23.42};
json const j_const(j);
SUBCASE("json + begin/end") {
typename json::iterator it = j.begin();
CHECK(it != j.end());
CHECK(*it == j);
it++;
CHECK(it != j.begin());
CHECK(it == j.end());
it--;
CHECK(it == j.begin());
CHECK(it != j.end());
CHECK(*it == j);
++it;
CHECK(it != j.begin());
CHECK(it == j.end());
--it;