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unit-iterators1.cpp
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1692 lines (1388 loc) · 52.2 KB
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/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++ (test suite)
| | |__ | | | | | | version 3.7.0
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
SPDX-License-Identifier: MIT
Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
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,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "doctest_compatibility.h"
#define private public
#include <nlohmann/json.hpp>
using nlohmann::json;
#undef private
TEST_CASE("iterators 1")
{
SECTION("basic behavior")
{
SECTION("uninitialized")
{
json::iterator it;
CHECK(it.m_object == nullptr);
json::const_iterator cit;
CHECK(cit.m_object == nullptr);
}
SECTION("boolean")
{
json j = true;
json j_const(j);
SECTION("json + begin/end")
{
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);
}
SECTION("const json + begin/end")
{
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);
}
SECTION("json + cbegin/cend")
{
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);
}
SECTION("const json + cbegin/cend")
{
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);
}
SECTION("json + rbegin/rend")
{
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);
}
SECTION("json + crbegin/crend")
{
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);
}
SECTION("const json + crbegin/crend")
{
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);
}
SECTION("additional tests")
{
SECTION("!(begin != begin)")
{
CHECK(not(j.begin() != j.begin()));
}
SECTION("!(end != end)")
{
CHECK(not(j.end() != j.end()));
}
SECTION("begin < end")
{
CHECK(j.begin() < j.end());
}
SECTION("begin <= end")
{
CHECK(j.begin() <= j.end());
}
SECTION("end > begin")
{
CHECK(j.end() > j.begin());
}
SECTION("end >= begin")
{
CHECK(j.end() >= j.begin());
}
SECTION("end == end")
{
CHECK(j.end() == j.end());
}
SECTION("end <= end")
{
CHECK(j.end() <= j.end());
}
SECTION("begin == begin")
{
CHECK(j.begin() == j.begin());
}
SECTION("begin <= begin")
{
CHECK(j.begin() <= j.begin());
}
SECTION("begin >= begin")
{
CHECK(j.begin() >= j.begin());
}
SECTION("!(begin == end)")
{
CHECK(not(j.begin() == j.end()));
}
SECTION("begin != end")
{
CHECK(j.begin() != j.end());
}
SECTION("begin+1 == end")
{
CHECK(j.begin() + 1 == j.end());
}
SECTION("begin == end-1")
{
CHECK(j.begin() == j.end() - 1);
}
SECTION("begin != end+1")
{
CHECK(j.begin() != j.end() + 1);
}
SECTION("end != end+1")
{
CHECK(j.end() != j.end() + 1);
}
SECTION("begin+1 != begin+2")
{
CHECK(j.begin() + 1 != j.begin() + 2);
}
SECTION("begin+1 < begin+2")
{
CHECK(j.begin() + 1 < j.begin() + 2);
}
SECTION("begin+1 <= begin+2")
{
CHECK(j.begin() + 1 <= j.begin() + 2);
}
SECTION("end+1 != end+2")
{
CHECK(j.end() + 1 != j.end() + 2);
}
}
SECTION("key/value")
{
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_AS(it.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(it.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(it.value() == json(true));
CHECK_THROWS_AS(cit.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(cit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(cit.value() == json(true));
auto rit = j.rend();
auto crit = j.crend();
CHECK_THROWS_AS(rit.key(), json::invalid_iterator&);
CHECK_THROWS_AS(rit.value(), json::invalid_iterator&);
CHECK_THROWS_AS(crit.key(), json::invalid_iterator&);
CHECK_THROWS_AS(crit.value(), json::invalid_iterator&);
CHECK_THROWS_WITH(rit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK_THROWS_WITH(rit.value(), "[json.exception.invalid_iterator.214] cannot get value");
CHECK_THROWS_WITH(crit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK_THROWS_WITH(crit.value(), "[json.exception.invalid_iterator.214] cannot get value");
}
}
SECTION("string")
{
json j = "hello world";
json j_const(j);
SECTION("json + begin/end")
{
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);
}
SECTION("const json + begin/end")
{
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);
}
SECTION("json + cbegin/cend")
{
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);
}
SECTION("const json + cbegin/cend")
{
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);
}
SECTION("json + rbegin/rend")
{
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);
}
SECTION("json + crbegin/crend")
{
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);
}
SECTION("const json + crbegin/crend")
{
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);
}
SECTION("key/value")
{
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_AS(it.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(it.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(it.value() == json("hello world"));
CHECK_THROWS_AS(cit.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(cit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(cit.value() == json("hello world"));
auto rit = j.rend();
auto crit = j.crend();
CHECK_THROWS_AS(rit.key(), json::invalid_iterator&);
CHECK_THROWS_AS(rit.value(), json::invalid_iterator&);
CHECK_THROWS_AS(crit.key(), json::invalid_iterator&);
CHECK_THROWS_AS(crit.value(), json::invalid_iterator&);
CHECK_THROWS_WITH(rit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK_THROWS_WITH(rit.value(), "[json.exception.invalid_iterator.214] cannot get value");
CHECK_THROWS_WITH(crit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK_THROWS_WITH(crit.value(), "[json.exception.invalid_iterator.214] cannot get value");
}
}
SECTION("array")
{
json j = {1, 2, 3};
json j_const(j);
SECTION("json + begin/end")
{
json::iterator it_begin = j.begin();
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);
}
SECTION("const json + begin/end")
{
json::const_iterator it_begin = j_const.begin();
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);
}
SECTION("json + cbegin/cend")
{
json::const_iterator it_begin = j.cbegin();
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);
}
SECTION("const json + cbegin/cend")
{
json::const_iterator it_begin = j_const.cbegin();
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);
}
SECTION("json + rbegin/rend")
{
json::reverse_iterator it_begin = j.rbegin();
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);
}
SECTION("json + crbegin/crend")
{
json::const_reverse_iterator it_begin = j.crbegin();
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);
}
SECTION("const json + crbegin/crend")
{
json::const_reverse_iterator it_begin = j_const.crbegin();
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);
}
SECTION("key/value")
{
auto it = j.begin();
auto cit = j_const.cbegin();
CHECK_THROWS_AS(it.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(it.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(it.value() == json(1));
CHECK_THROWS_AS(cit.key(), json::invalid_iterator&);
CHECK_THROWS_WITH(cit.key(), "[json.exception.invalid_iterator.207] cannot use key() for non-object iterators");
CHECK(cit.value() == json(1));
}
}
SECTION("object")
{
json j = {{"A", 1}, {"B", 2}, {"C", 3}};
json j_const(j);
SECTION("json + begin/end")
{
json::iterator it_begin = j.begin();
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);
}
SECTION("const json + begin/end")
{
json::const_iterator it_begin = j_const.begin();
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);
}
SECTION("json + cbegin/cend")
{
json::const_iterator it_begin = j.cbegin();
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);
}
SECTION("const json + cbegin/cend")
{
json::const_iterator it_begin = j_const.cbegin();
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);
}
SECTION("json + rbegin/rend")
{
json::reverse_iterator it_begin = j.rbegin();
json::reverse_iterator it_end = j.rend();
auto it = it_begin;
CHECK(it != it_end);
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);
}
SECTION("json + crbegin/crend")
{
json::const_reverse_iterator it_begin = j.crbegin();
json::const_reverse_iterator it_end = j.crend();
auto it = it_begin;
CHECK(it != it_end);
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);
}
SECTION("const json + crbegin/crend")
{
json::const_reverse_iterator it_begin = j_const.crbegin();
json::const_reverse_iterator it_end = j_const.crend();
auto it = it_begin;
CHECK(it != it_end);
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);
}
SECTION("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));
}
}
SECTION("number (integer)")
{
json j = 23;
json j_const(j);
SECTION("json + begin/end")
{
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);
}
SECTION("const json + begin/end")
{
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);
}
SECTION("json + cbegin/cend")
{
json::const_iterator it = j.cbegin();
CHECK(it != j.cend());
CHECK(*it == j);
it++;
CHECK(it != j.cbegin());
CHECK(it == j.cend());