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Split the dump and comparison tests off unit-json_view.cpp

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The MinGW linker of the Windows clang jobs cannot link object files with more
than 32767 sections ("relocation truncated to fit: IMAGE_REL_AMD64_REL32
against `.rdata'"). unit-json_view.cpp reaches that limit as the stack
grows, so its "json_view dump" and "json_view comparison" test cases move
into unit-json_view_dump.cpp. The test generator and has_duplicate_keys()
that both files use move into json_view_test_helpers.hpp.

The new file mentions JSON_HAS_CPP_17, so it is built for C++17 like the file
it was split from.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann committed 2026-10-10 11:34:42 +02:00
1 parent 90c6696641
commit fc0d39ca9d
4 files changed
+369 -305
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tests/src/json_view_test_helpers.hpp
+89
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@@ -0,0 +1,89 @@
// __ _____ _____ _____
// __| | __| | | | 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
#pragma once
// helpers shared by the unit-json_view*.cpp files, which are split to keep every
// object file small enough for the MinGW linker (it fails to link objects with
// more than 32767 sections)
#include <nlohmann/json_view.hpp>
#include <algorithm> // any_of
#include <random> // mt19937
#include <string> // string
namespace json_view_test
{
// a small deterministic generator of documents
struct generator
{
std::mt19937 rng{5295}; // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed)
int r(int n)
{
return static_cast<int>(rng() % static_cast<unsigned>(n));
}
void str(std::string& o)
{
static const char* const pieces[] = {"a", "Z", " ", "\\n", "\\\"", "\\u00e9", "\\ud83d\\ude00", "\xc3\xa9", "\xe3\x81\x82", "long text beyond the first sixteen bytes"}; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
o += '"';
for (int n = r(5); n > 0; --n)
{
o += pieces[r(10)];
}
o += '"';
}
void value(std::string& o, int depth)
{
static const char* const scalars[] = {"0", "-1", "123456789012", "18446744073709551615", "18446744073709551616", "-9223372036854775809", // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
"1.5", "-2.25e-3", "1E2", "0.1", "true", "false", "null"
};
const int k = depth > 5 ? 2 + r(4) : r(6);
if (k < 2)
{
const bool object = k == 0;
o += object ? '{' : '[';
for (int i = r(5); i > 0; --i)
{
if (object)
{
str(o);
o += r(2) == 0 ? ":" : " : ";
}
value(o, depth + 1);
o += i > 1 ? ", " : "";
}
o += object ? '}' : ']';
}
else if (k < 4)
{
str(o);
}
else
{
o += scalars[r(13)];
}
}
};
// whether an object of the view repeats a key
inline bool has_duplicate_keys(const nlohmann::ordered_json_view& v)
{
if (v.is_object() && v.size() != v.materialize().size())
{
return true;
}
return std::any_of(v.begin(), v.end(), [](const nlohmann::ordered_json_view e)
{
return e.is_structured() && has_duplicate_keys(e);
});
}
} // namespace json_view_test
tests/src/unit-json_view.cpp
+4 -305
View File
@@ -16,6 +16,10 @@ using nlohmann::json_view;
using nlohmann::ordered_json_document;
using nlohmann::ordered_json_view;
#include "json_view_test_helpers.hpp"
using json_view_test::generator;
using json_view_test::has_duplicate_keys;
#include <algorithm>
#include <array>
#include <cmath>
@@ -121,60 +125,6 @@ std::string view_exception(const std::string& text, bool comments = false, bool
return "";
}
#endif
// a small deterministic generator of documents
struct generator
{
std::mt19937 rng{5295}; // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed)
int r(int n)
{
return static_cast<int>(rng() % static_cast<unsigned>(n));
}
void str(std::string& o)
{
static const char* const pieces[] = {"a", "Z", " ", "\\n", "\\\"", "\\u00e9", "\\ud83d\\ude00", "\xc3\xa9", "\xe3\x81\x82", "long text beyond the first sixteen bytes"}; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
o += '"';
for (int n = r(5); n > 0; --n)
{
o += pieces[r(10)];
}
o += '"';
}
void value(std::string& o, int depth)
{
static const char* const scalars[] = {"0", "-1", "123456789012", "18446744073709551615", "18446744073709551616", "-9223372036854775809", // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
"1.5", "-2.25e-3", "1E2", "0.1", "true", "false", "null"
};
const int k = depth > 5 ? 2 + r(4) : r(6);
if (k < 2)
{
const bool object = k == 0;
o += object ? '{' : '[';
for (int i = r(5); i > 0; --i)
{
if (object)
{
str(o);
o += r(2) == 0 ? ":" : " : ";
}
value(o, depth + 1);
o += i > 1 ? ", " : "";
}
o += object ? '}' : ']';
}
else if (k < 4)
{
str(o);
}
else
{
o += scalars[r(13)];
}
}
};
} // namespace
TEST_CASE("json_view")
@@ -1020,18 +970,6 @@ std::uint32_t bits(float x)
return r;
}
bool has_duplicate_keys(const ordered_json_view& v)
{
if (v.is_object() && v.size() != v.materialize().size())
{
return true;
}
return std::any_of(v.begin(), v.end(), [](const ordered_json_view e)
{
return e.is_structured() && has_duplicate_keys(e);
});
}
// compares the conversions of a view with those of ordered_json
void check_values(const ordered_json_view& v, const ordered_json& j, const std::string& text)
{
@@ -1376,242 +1314,3 @@ TEST_CASE("json_view JSON pointers")
}
#endif
}
TEST_CASE("json_view dump")
{
SECTION("the output of ordered_json::dump()")
{
generator g;
for (int i = 0; i < 2000; ++i)
{
std::string text;
g.value(text, 0);
const ordered_json_document d = ordered_json_document::parse(text);
if (has_duplicate_keys(d.root()))
{
continue;
}
CAPTURE(text)
const ordered_json j = ordered_json::parse(text);
for (const int indent :
{
-1, 0, 2
})
{
for (const bool ensure_ascii :
{
false, true
})
{
CHECK(d.root().dump(indent, i % 2 == 0 ? ' ' : '\t', ensure_ascii) == j.dump(indent, i % 2 == 0 ? ' ' : '\t', ensure_ascii));
}
}
// also of each element
for (const ordered_json_view e : d.root())
{
CHECK(e.dump() == e.materialize().dump());
}
}
}
SECTION("strings")
{
const std::string text = R"(["plain", "\u0000\u0001\u001f\u007f\u0080é€￿😀", "\"\\\/\b\f\n\r\t", "aéあ😀b", "long text beyond the eight bytes of a word \n with an escape in the middle"])";
const ordered_json_document d = ordered_json_document::parse(text);
const ordered_json j = ordered_json::parse(text);
CHECK(d.root().dump() == j.dump());
CHECK(d.root().dump(-1, ' ', true) == j.dump(-1, ' ', true));
CHECK(d.root().dump(4, ' ', true) == j.dump(4, ' ', true));
const std::string key_text = R"({"é\n": {"\"": [], "": {}}})";
const ordered_json_document keys = ordered_json_document::parse(key_text);
const ordered_json key_json = ordered_json::parse(key_text);
CHECK(keys.root().dump(2, ' ', true) == key_json.dump(2, ' ', true));
}
SECTION("numbers")
{
const std::string text = "[1.50, 1E2, -0, -0.0, 123456789012345678901234567890, 18446744073709551615, -9223372036854775808, 0.1, 1e-7, 5e-324]";
const json_document d = json_document::parse(text);
CHECK(d.root().dump() == json::parse(text).dump());
CHECK(d.root().dump() == "[1.5,100.0,0,-0.0,1.2345678901234568e+29,18446744073709551615,-9223372036854775808,0.1,1e-07,5e-324]");
CHECK(d.root().dump(-1, ' ', false, json_view::number_format::source) == "[1.50,1E2,-0,-0.0,123456789012345678901234567890,18446744073709551615,-9223372036854775808,0.1,1e-7,5e-324]");
// random doubles, written as parse() and dump() would
std::mt19937_64 rng(1170); // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed)
std::string many = "[";
for (int i = 0; i < 5000; ++i)
{
const std::uint64_t bits = rng();
double x = 0;
std::memcpy(&x, &bits, sizeof(x));
if (std::isfinite(x))
{
many += (many.size() > 1 ? "," : "") + json(x).dump();
}
}
many += ']';
const json_document many_document = json_document::parse(many);
CHECK(many_document.root().dump() == json::parse(many).dump());
using json_float = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;
const nlohmann::basic_json_document<json_float> float_document = nlohmann::basic_json_document<json_float>::parse("[0.1, 1.5e10, 3.4028235e38]");
CHECK(float_document.root().dump() == json_float::parse("[0.1, 1.5e10, 3.4028235e38]").dump());
}
SECTION("members in document order, all of them")
{
const json_document d = json_document::parse(R"({"b": 1, "a": 2, "b": 3})");
CHECK(d.root().dump() == R"({"b":1,"a":2,"b":3})");
CHECK(d.root().dump(1) == "{\n \"b\": 1,\n \"a\": 2,\n \"b\": 3\n}");
// dump() writes all members, though the lookup finds the first
CHECK(d.root()["b"].dump() == "1");
}
SECTION("deep nesting")
{
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
const json_document deep_document = json_document::parse(deep);
CHECK(deep_document.root().dump() == deep);
}
SECTION("the output buffer of a small value is small")
{
// an escaped key after the value: its node lies in the arena, so the
// source extent of the value cannot be read from the next node
const std::string big(100000, 'a');
const std::string text = R"({"small":1,"list":[1,2,3],"k\n":")" + big + R"("})";
const json_document d = json_document::parse(text);
const auto small = d.root()["small"].dump();
CHECK(small == "1");
CHECK(small.capacity() < 4096);
const auto list = d.root()["list"].dump();
CHECK(list == "[1,2,3]");
CHECK(list.capacity() < 4096);
CHECK(d.root()["list"].dump(2).capacity() < 4096);
// the whole document and the large value are unaffected
CHECK(d.root().dump() == ordered_json::parse(text).dump());
CHECK(d.root()["k\n"].dump() == "\"" + big + "\"");
}
SECTION("output that outgrows the estimate")
{
// ensure_ascii writes six bytes for each two-byte character
std::string chars;
for (int i = 0; i < 5000; ++i)
{
chars += "\xC3\xA9";
}
const json_document d = json_document::parse(R"({"a":")" + chars + R"(","k\n":1})");
const json expected = json::parse("\"" + chars + "\"");
CHECK(d.root()["a"].dump(-1, ' ', true) == expected.dump(-1, ' ', true));
CHECK(d.root()["a"].dump(-1, ' ', true).size() == 2 + (5000 * 6));
}
SECTION("streams and discarded views")
{
const json_document d = json_document::parse(R"({"a": [1, 2]})");
std::ostringstream compact;
compact << d.root();
CHECK(compact.str() == R"({"a":[1,2]})");
std::ostringstream pretty;
pretty << std::setw(2) << std::setfill('.') << d.root() << d.root()["a"];
CHECK(pretty.str() == "{\n..\"a\": [\n....1,\n....2\n..]\n}[1,2]");
CHECK(json_view().dump() == json(json::value_t::discarded).dump());
}
}
TEST_CASE("json_view comparison")
{
SECTION("equality of the values parse() produces")
{
generator g;
std::vector<std::string> texts;
for (int i = 0; i < 600; ++i)
{
std::string text;
g.value(text, 0);
texts.push_back(text);
// the same value written differently: sorted keys, canonical numbers
texts.push_back(json::parse(text).dump(1));
}
for (std::size_t i = 0; i + 2 < texts.size(); ++i)
{
for (std::size_t k = i; k < i + 3; ++k)
{
CAPTURE(texts[i])
CAPTURE(texts[k])
const json_document a = json_document::parse(texts[i]);
const json_document b = json_document::parse(texts[k]);
const json ja = json::parse(texts[i]);
const json jb = json::parse(texts[k]);
CHECK((a.root() == b.root()) == (ja == jb));
CHECK((a.root() != b.root()) == (ja != jb));
CHECK((a.root() == jb) == (ja == jb));
CHECK((jb == a.root()) == (ja == jb));
CHECK((a.root() != jb) == (ja != jb));
CHECK((jb != a.root()) == (ja != jb));
// ordered_json compares members in order
const ordered_json_document oa = ordered_json_document::parse(texts[i]);
const ordered_json_document ob = ordered_json_document::parse(texts[k]);
const ordered_json oja = ordered_json::parse(texts[i]);
const ordered_json ojb = ordered_json::parse(texts[k]);
CHECK((oa.root() == ob.root()) == (oja == ojb));
CHECK((oa.root() == ojb) == (oja == ojb));
}
}
}
SECTION("numbers, duplicate keys, member order")
{
const auto same = [](const char* x, const char* y)
{
const json_document dx = json_document::parse(x);
const json_document dy = json_document::parse(y);
return dx.root() == dy.root();
};
CHECK(same("1", "1.0"));
CHECK(same("[1, -1, 2.5]", "[1.0, -1.0, 25e-1]"));
CHECK(!same("1", "1.5"));
CHECK(same("18446744073709551615", "18446744073709551615"));
CHECK(same(R"({"a": 1, "a": 2})", R"({"a": 2})"));
CHECK(!same(R"({"a": 1, "a": 2})", R"({"a": 1})"));
CHECK(same(R"({"a": 1, "b": 2})", R"({"b": 2, "a": 1})"));
CHECK(!same(R"({"a": 1})", R"({"a": 1, "b": 2})"));
CHECK(!same("[1, 2]", "[2, 1]"));
CHECK(!same("\"a\"", "\"b\""));
CHECK(same("\"\\u00e9\"", "\"\xc3\xa9\""));
CHECK(!same("null", "false"));
CHECK(!same("[]", "{}"));
const ordered_json_document dup = ordered_json_document::parse(R"({"a": 1, "b": 2, "a": 3})");
const ordered_json_document last = ordered_json_document::parse(R"({"a": 3, "b": 2})");
CHECK(dup.root() == last.root());
// (== compares as parse() resolves duplicates, a lookup finds the first)
CHECK(dup.root()["a"].materialize() == 1);
CHECK(dup.root()["a"] != last.root()["a"]);
const ordered_json_document ab = ordered_json_document::parse(R"({"a": 1, "b": 2})");
const ordered_json_document ba = ordered_json_document::parse(R"({"b": 2, "a": 1})");
CHECK(ab.root() != ba.root());
// discarded values compare as basic_json's do
const json discarded(json::value_t::discarded);
CHECK((json_view() == json_view()) == (discarded == discarded)); // NOLINT(readability-container-size-empty): operator== is tested
CHECK((json_view() == discarded) == (discarded == discarded)); // NOLINT(readability-container-size-empty)
const json_document null_document = json_document::parse("null");
CHECK(!(json_view() == null_document.root())); // NOLINT(readability-container-size-empty)
CHECK(!(null_document.root() == discarded));
}
SECTION("deep nesting")
{
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
const json_document a = json_document::parse(deep);
const json_document b = json_document::parse(deep);
CHECK(a.root() == b.root());
CHECK(a.root() == json::parse(deep));
const std::string other = std::string(100000, '[') + "1" + std::string(100000, ']');
const json_document c = json_document::parse(other);
CHECK(a.root() != c.root());
}
}
tests/src/unit-json_view_dump.cpp
+275
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@@ -0,0 +1,275 @@
// __ _____ _____ _____
// __| | __| | | | 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 <nlohmann/json_view.hpp>
using nlohmann::json;
using nlohmann::ordered_json;
using nlohmann::json_document;
using nlohmann::json_view;
using nlohmann::ordered_json_document;
using nlohmann::ordered_json_view;
#include "json_view_test_helpers.hpp"
using json_view_test::generator;
using json_view_test::has_duplicate_keys;
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <iomanip>
#include <map>
#include <random>
#include <sstream>
#include <string>
#include <vector>
// These tests were split off unit-json_view.cpp, whose object file got too large
// for the MinGW linker (see json_view_test_helpers.hpp). Like that file, this one
// is also built with C++17, as it mentions JSON_HAS_CPP_17.
TEST_CASE("json_view dump")
{
SECTION("the output of ordered_json::dump()")
{
generator g;
for (int i = 0; i < 2000; ++i)
{
std::string text;
g.value(text, 0);
const ordered_json_document d = ordered_json_document::parse(text);
if (has_duplicate_keys(d.root()))
{
continue;
}
CAPTURE(text)
const ordered_json j = ordered_json::parse(text);
for (const int indent :
{
-1, 0, 2
})
{
for (const bool ensure_ascii :
{
false, true
})
{
CHECK(d.root().dump(indent, i % 2 == 0 ? ' ' : '\t', ensure_ascii) == j.dump(indent, i % 2 == 0 ? ' ' : '\t', ensure_ascii));
}
}
// also of each element
for (const ordered_json_view e : d.root())
{
CHECK(e.dump() == e.materialize().dump());
}
}
}
SECTION("strings")
{
const std::string text = R"(["plain", "\u0000\u0001\u001f\u007f\u0080é€￿😀", "\"\\\/\b\f\n\r\t", "aéあ😀b", "long text beyond the eight bytes of a word \n with an escape in the middle"])";
const ordered_json_document d = ordered_json_document::parse(text);
const ordered_json j = ordered_json::parse(text);
CHECK(d.root().dump() == j.dump());
CHECK(d.root().dump(-1, ' ', true) == j.dump(-1, ' ', true));
CHECK(d.root().dump(4, ' ', true) == j.dump(4, ' ', true));
const std::string key_text = R"({"é\n": {"\"": [], "": {}}})";
const ordered_json_document keys = ordered_json_document::parse(key_text);
const ordered_json key_json = ordered_json::parse(key_text);
CHECK(keys.root().dump(2, ' ', true) == key_json.dump(2, ' ', true));
}
SECTION("numbers")
{
const std::string text = "[1.50, 1E2, -0, -0.0, 123456789012345678901234567890, 18446744073709551615, -9223372036854775808, 0.1, 1e-7, 5e-324]";
const json_document d = json_document::parse(text);
CHECK(d.root().dump() == json::parse(text).dump());
CHECK(d.root().dump() == "[1.5,100.0,0,-0.0,1.2345678901234568e+29,18446744073709551615,-9223372036854775808,0.1,1e-07,5e-324]");
CHECK(d.root().dump(-1, ' ', false, json_view::number_format::source) == "[1.50,1E2,-0,-0.0,123456789012345678901234567890,18446744073709551615,-9223372036854775808,0.1,1e-7,5e-324]");
// random doubles, written as parse() and dump() would
std::mt19937_64 rng(1170); // NOLINT(cert-msc32-c,cert-msc51-cpp,bugprone-random-generator-seed)
std::string many = "[";
for (int i = 0; i < 5000; ++i)
{
const std::uint64_t bits = rng();
double x = 0;
std::memcpy(&x, &bits, sizeof(x));
if (std::isfinite(x))
{
many += (many.size() > 1 ? "," : "") + json(x).dump();
}
}
many += ']';
const json_document many_document = json_document::parse(many);
CHECK(many_document.root().dump() == json::parse(many).dump());
using json_float = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;
const nlohmann::basic_json_document<json_float> float_document = nlohmann::basic_json_document<json_float>::parse("[0.1, 1.5e10, 3.4028235e38]");
CHECK(float_document.root().dump() == json_float::parse("[0.1, 1.5e10, 3.4028235e38]").dump());
}
SECTION("members in document order, all of them")
{
const json_document d = json_document::parse(R"({"b": 1, "a": 2, "b": 3})");
CHECK(d.root().dump() == R"({"b":1,"a":2,"b":3})");
CHECK(d.root().dump(1) == "{\n \"b\": 1,\n \"a\": 2,\n \"b\": 3\n}");
// dump() writes all members, though the lookup finds the first
CHECK(d.root()["b"].dump() == "1");
}
SECTION("deep nesting")
{
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
const json_document deep_document = json_document::parse(deep);
CHECK(deep_document.root().dump() == deep);
}
SECTION("the output buffer of a small value is small")
{
// an escaped key after the value: its node lies in the arena, so the
// source extent of the value cannot be read from the next node
const std::string big(100000, 'a');
const std::string text = R"({"small":1,"list":[1,2,3],"k\n":")" + big + R"("})";
const json_document d = json_document::parse(text);
const auto small = d.root()["small"].dump();
CHECK(small == "1");
CHECK(small.capacity() < 4096);
const auto list = d.root()["list"].dump();
CHECK(list == "[1,2,3]");
CHECK(list.capacity() < 4096);
CHECK(d.root()["list"].dump(2).capacity() < 4096);
// the whole document and the large value are unaffected
CHECK(d.root().dump() == ordered_json::parse(text).dump());
CHECK(d.root()["k\n"].dump() == "\"" + big + "\"");
}
SECTION("output that outgrows the estimate")
{
// ensure_ascii writes six bytes for each two-byte character
std::string chars;
for (int i = 0; i < 5000; ++i)
{
chars += "\xC3\xA9";
}
const json_document d = json_document::parse(R"({"a":")" + chars + R"(","k\n":1})");
const json expected = json::parse("\"" + chars + "\"");
CHECK(d.root()["a"].dump(-1, ' ', true) == expected.dump(-1, ' ', true));
CHECK(d.root()["a"].dump(-1, ' ', true).size() == 2 + (5000 * 6));
}
SECTION("streams and discarded views")
{
const json_document d = json_document::parse(R"({"a": [1, 2]})");
std::ostringstream compact;
compact << d.root();
CHECK(compact.str() == R"({"a":[1,2]})");
std::ostringstream pretty;
pretty << std::setw(2) << std::setfill('.') << d.root() << d.root()["a"];
CHECK(pretty.str() == "{\n..\"a\": [\n....1,\n....2\n..]\n}[1,2]");
CHECK(json_view().dump() == json(json::value_t::discarded).dump());
}
}
TEST_CASE("json_view comparison")
{
SECTION("equality of the values parse() produces")
{
generator g;
std::vector<std::string> texts;
for (int i = 0; i < 600; ++i)
{
std::string text;
g.value(text, 0);
texts.push_back(text);
// the same value written differently: sorted keys, canonical numbers
texts.push_back(json::parse(text).dump(1));
}
for (std::size_t i = 0; i + 2 < texts.size(); ++i)
{
for (std::size_t k = i; k < i + 3; ++k)
{
CAPTURE(texts[i])
CAPTURE(texts[k])
const json_document a = json_document::parse(texts[i]);
const json_document b = json_document::parse(texts[k]);
const json ja = json::parse(texts[i]);
const json jb = json::parse(texts[k]);
CHECK((a.root() == b.root()) == (ja == jb));
CHECK((a.root() != b.root()) == (ja != jb));
CHECK((a.root() == jb) == (ja == jb));
CHECK((jb == a.root()) == (ja == jb));
CHECK((a.root() != jb) == (ja != jb));
CHECK((jb != a.root()) == (ja != jb));
// ordered_json compares members in order
const ordered_json_document oa = ordered_json_document::parse(texts[i]);
const ordered_json_document ob = ordered_json_document::parse(texts[k]);
const ordered_json oja = ordered_json::parse(texts[i]);
const ordered_json ojb = ordered_json::parse(texts[k]);
CHECK((oa.root() == ob.root()) == (oja == ojb));
CHECK((oa.root() == ojb) == (oja == ojb));
}
}
}
SECTION("numbers, duplicate keys, member order")
{
const auto same = [](const char* x, const char* y)
{
const json_document dx = json_document::parse(x);
const json_document dy = json_document::parse(y);
return dx.root() == dy.root();
};
CHECK(same("1", "1.0"));
CHECK(same("[1, -1, 2.5]", "[1.0, -1.0, 25e-1]"));
CHECK(!same("1", "1.5"));
CHECK(same("18446744073709551615", "18446744073709551615"));
CHECK(same(R"({"a": 1, "a": 2})", R"({"a": 2})"));
CHECK(!same(R"({"a": 1, "a": 2})", R"({"a": 1})"));
CHECK(same(R"({"a": 1, "b": 2})", R"({"b": 2, "a": 1})"));
CHECK(!same(R"({"a": 1})", R"({"a": 1, "b": 2})"));
CHECK(!same("[1, 2]", "[2, 1]"));
CHECK(!same("\"a\"", "\"b\""));
CHECK(same("\"\\u00e9\"", "\"\xc3\xa9\""));
CHECK(!same("null", "false"));
CHECK(!same("[]", "{}"));
const ordered_json_document dup = ordered_json_document::parse(R"({"a": 1, "b": 2, "a": 3})");
const ordered_json_document last = ordered_json_document::parse(R"({"a": 3, "b": 2})");
CHECK(dup.root() == last.root());
// (== compares as parse() resolves duplicates, a lookup finds the first)
CHECK(dup.root()["a"].materialize() == 1);
CHECK(dup.root()["a"] != last.root()["a"]);
const ordered_json_document ab = ordered_json_document::parse(R"({"a": 1, "b": 2})");
const ordered_json_document ba = ordered_json_document::parse(R"({"b": 2, "a": 1})");
CHECK(ab.root() != ba.root());
// discarded values compare as basic_json's do
const json discarded(json::value_t::discarded);
CHECK((json_view() == json_view()) == (discarded == discarded)); // NOLINT(readability-container-size-empty): operator== is tested
CHECK((json_view() == discarded) == (discarded == discarded)); // NOLINT(readability-container-size-empty)
const json_document null_document = json_document::parse("null");
CHECK(!(json_view() == null_document.root())); // NOLINT(readability-container-size-empty)
CHECK(!(null_document.root() == discarded));
}
SECTION("deep nesting")
{
const std::string deep = std::string(100000, '[') + std::string(100000, ']');
const json_document a = json_document::parse(deep);
const json_document b = json_document::parse(deep);
CHECK(a.root() == b.root());
CHECK(a.root() == json::parse(deep));
const std::string other = std::string(100000, '[') + "1" + std::string(100000, ']');
const json_document c = json_document::parse(other);
CHECK(a.root() != c.root());
}
}