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f208a9c19b
json/test/src/unit-comparison.cpp
Florian Albrechtskirchinger f208a9c19b
Fix C++20/gcc-12 issues (Part 1) (#3379) 
* 🔧 use proper GCC binary

* 🔧 add more GCC warning flags

* ⚗️ try fix from https://github.com/nlohmann/json/issues/3138#issuecomment-1015562666

* Fix custom allocator test build failures (C++20)

Allocator tests fail to compile in C++20 mode with clang+MS STL due
to missing copy constructors.

* Fix test build failures due to missing noexcept (gcc-12)

* alt_string has multiple member functions that should be marked noexcept.
* nlohmann::ordered_map constructors can be noexcept.

Compilation failures result from the warning flag -Werror=noexcept and
gcc-12.

* Disable broken comparison tests in C++20 mode

Co-authored-by: Niels Lohmann <mail@nlohmann.me>
2022-03-07 22:19:28 +01:00

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/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++ (test suite)
| | |__ | | | | | | version 3.10.5
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
SPDX-License-Identifier: MIT
Copyright (c) 2013-2022 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"
#include <nlohmann/json.hpp>
using nlohmann::json;
#if (defined(__cplusplus) && __cplusplus >= 202002L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 202002L)
#define JSON_HAS_CPP_20
#endif
namespace
{
// helper function to check std::less<json::value_t>
// see https://en.cppreference.com/w/cpp/utility/functional/less
template <typename A, typename B, typename U = std::less<json::value_t>>
bool f(A a, B b, U u = U())
{
return u(a, b);
}
} // namespace
TEST_CASE("lexicographical comparison operators")
{
SECTION("types")
{
std::vector<json::value_t> j_types =
{
json::value_t::null,
json::value_t::boolean,
json::value_t::number_integer,
json::value_t::number_unsigned,
json::value_t::number_float,
json::value_t::object,
json::value_t::array,
json::value_t::string,
json::value_t::binary
};
SECTION("comparison: less")
{
std::vector<std::vector<bool>> expected =
{
{false, true, true, true, true, true, true, true, true},
{false, false, true, true, true, true, true, true, true},
{false, false, false, false, false, true, true, true, true},
{false, false, false, false, false, true, true, true, true},
{false, false, false, false, false, true, true, true, true},
{false, false, false, false, false, false, true, true, true},
{false, false, false, false, false, false, false, true, true},
{false, false, false, false, false, false, false, false, true},
{false, false, false, false, false, false, false, false, false}
};
for (size_t i = 0; i < j_types.size(); ++i)
{
for (size_t j = 0; j < j_types.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
// check precomputed values
CHECK(operator<(j_types[i], j_types[j]) == expected[i][j]);
CHECK(f(j_types[i], j_types[j]) == expected[i][j]);
}
}
}
}
SECTION("values")
{
json j_values =
{
nullptr, nullptr,
-17, 42,
8u, 13u,
3.14159, 23.42,
"foo", "bar",
true, false,
{1, 2, 3}, {"one", "two", "three"},
{{"first", 1}, {"second", 2}}, {{"a", "A"}, {"b", {"B"}}},
json::binary({1, 2, 3}), json::binary({1, 2, 4})
};
SECTION("comparison: equal")
{
std::vector<std::vector<bool>> expected =
{
{true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
{true, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
{false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
{false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
{false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false, false},
{false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false, false},
{false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false, false},
{false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false, false},
{false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false, false},
{false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, false},
{false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false},
{false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false, false},
{false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false, false},
{false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false, false},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false, false},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false, false},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, false},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true}
};
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
CAPTURE(j_values[i])
CAPTURE(j_values[j])
// check precomputed values
CHECK( (j_values[i] == j_values[j]) == expected[i][j] );
}
}
// comparison with discarded elements
json j_discarded(json::value_t::discarded);
for (const auto& v : j_values)
{
CHECK( (v == j_discarded) == false);
CHECK( (j_discarded == v) == false);
CHECK( (j_discarded == j_discarded) == false);
}
// compare with null pointer
json j_null;
CHECK(j_null == nullptr);
CHECK(nullptr == j_null);
}
SECTION("comparison: not equal")
{
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
// check definition
CHECK( (j_values[i] != j_values[j]) == !(j_values[i] == j_values[j]) );
}
}
// compare with null pointer
json j_null;
CHECK( (j_null != nullptr) == false);
CHECK( (nullptr != j_null) == false);
CHECK( (j_null != nullptr) == !(j_null == nullptr));
CHECK( (nullptr != j_null) == !(nullptr == j_null));
}
SECTION("comparison: less")
{
std::vector<std::vector<bool>> expected =
{
{false, false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true},
{false, false, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true},
{false, false, false, true, true, true, true, true, true, true, false, false, true, true, true, true, true, true},
{false, false, false, false, false, false, false, false, true, true, false, false, true, true, true, true, true, true},
{false, false, false, true, false, true, false, true, true, true, false, false, true, true, true, true, true, true},
{false, false, false, true, false, false, false, true, true, true, false, false, true, true, true, true, true, true},
{false, false, false, true, true, true, false, true, true, true, false, false, true, true, true, true, true, true},
{false, false, false, true, false, false, false, false, true, true, false, false, true, true, true, true, true, true},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true, true},
{false, false, false, false, false, false, false, false, true, false, false, false, false, false, false, false, true, true},
{false, false, true, true, true, true, true, true, true, true, false, false, true, true, true, true, true, true},
{false, false, true, true, true, true, true, true, true, true, true, false, true, true, true, true, true, true},
{false, false, false, false, false, false, false, false, true, true, false, false, false, true, false, false, true, true},
{false, false, false, false, false, false, false, false, true, true, false, false, false, false, false, false, true, true},
{false, false, false, false, false, false, false, false, true, true, false, false, true, true, false, false, true, true},
{false, false, false, false, false, false, false, false, true, true, false, false, true, true, true, false, true, true},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, true},
{false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false}
};
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
// Skip comparing indicies 12 and 13, and 13 and 12 in C++20 pending fix
// See issue #3207
#ifdef JSON_HAS_CPP_20
if ((i == 12 && j == 13) || (i == 13 && j == 12))
{
continue;
}
#endif
CAPTURE(i)
CAPTURE(j)
CAPTURE(j_values[i])
CAPTURE(j_values[j])
// check precomputed values
CHECK( (j_values[i] < j_values[j]) == expected[i][j] );
}
}
// comparison with discarded elements
json j_discarded(json::value_t::discarded);
for (size_t i = 0; i < j_values.size(); ++i)
{
CAPTURE(i)
CHECK( (j_values[i] < j_discarded) == false);
CHECK( (j_discarded < j_values[i]) == false);
CHECK( (j_discarded < j_discarded) == false);
}
}
SECTION("comparison: less than or equal equal")
{
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
// check definition
CHECK( (j_values[i] <= j_values[j]) == !(j_values[j] < j_values[i]) );
}
}
}
SECTION("comparison: greater than")
{
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
// check definition
CHECK( (j_values[i] > j_values[j]) == (j_values[j] < j_values[i]) );
}
}
}
SECTION("comparison: greater than or equal")
{
for (size_t i = 0; i < j_values.size(); ++i)
{
for (size_t j = 0; j < j_values.size(); ++j)
{
CAPTURE(i)
CAPTURE(j)
// check definition
CHECK( (j_values[i] >= j_values[j]) == !(j_values[i] < j_values[j]) );
}
}
}
}
}
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