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https://github.com/nlohmann/json.git
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Niels Lohmann
d540750f21
#5787 missed the instantiations spelled as `basic_json <` (astyle's formatting) or ending in the CustomBaseClass argument. Convert them, including the binary_t.md example pointed out in review. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
// __ _____ _____ _____
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// __| | __| | | | JSON for Modern C++ (supporting code)
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// | | |__ | | | | | | version 3.12.0
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// |_____|_____|_____|_|___| https://github.com/nlohmann/json
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//
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// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
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// SPDX-License-Identifier: MIT
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#include "doctest_compatibility.h"
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#include <nlohmann/json.hpp>
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#include <cstdint>
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#include <functional>
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#ifdef JSON_HAS_CPP_17
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#include <cstddef>
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#endif
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namespace
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{
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// a BinaryType whose value type is signed: the elements must still be
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// processed as the numbers 0..255
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using char_binary_json = nlohmann::json::with_binary_t<std::vector<char>>;
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#ifdef JSON_HAS_CPP_17
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// a BinaryType whose value type is not an integer type at all
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using byte_binary_json = nlohmann::json::with_binary_t<std::vector<std::byte>>;
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#endif
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} // namespace
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TEST_CASE("binary type whose value type is not std::uint8_t")
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{
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SECTION("a signed value type does not dump negative numbers")
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{
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const std::vector<char> chars{'\0', '\x01', '\xFF'};
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CHECK(char_binary_json::binary(chars).dump() == R"({"bytes":[0,1,255],"subtype":null})");
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CHECK(char_binary_json::binary(chars, 42).dump() == R"({"bytes":[0,1,255],"subtype":42})");
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CHECK(char_binary_json::binary({}).dump() == R"({"bytes":[],"subtype":null})");
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}
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SECTION("a value is converted to the binary type if it is binary or an array")
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{
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const std::vector<char> chars{'\0', '\x01', '\x7F'};
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CHECK(char_binary_json::binary(chars).get<std::vector<char>>() == chars);
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CHECK(char_binary_json({0, 1, 127}).get<std::vector<char>>() == chars);
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CHECK_THROWS_WITH_AS(char_binary_json(1).get<std::vector<char>>(),
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"[json.exception.type_error.302] type must be binary or array, but is number",
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char_binary_json::type_error&);
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}
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SECTION("the default binary type is unchanged")
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{
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CHECK(nlohmann::json::binary({0, 1, 255}, 42).dump() == R"({"bytes":[0,1,255],"subtype":42})");
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}
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#ifdef JSON_HAS_CPP_17
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SECTION("dumping a value type that is not an integer")
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{
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const std::vector<std::byte> bytes{std::byte{0}, std::byte{1}, std::byte{0xFF}};
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CHECK(byte_binary_json::binary(bytes).dump() == R"({"bytes":[0,1,255],"subtype":null})");
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CHECK(byte_binary_json::binary(bytes, 42).dump() == R"({"bytes":[0,1,255],"subtype":42})");
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CHECK(byte_binary_json::binary({}).dump() == R"({"bytes":[],"subtype":null})");
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}
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SECTION("hashing and the binary formats")
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{
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const std::vector<std::byte> bytes{std::byte{0}, std::byte{1}, std::byte{0xFF}};
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const auto j = byte_binary_json::binary(bytes);
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CHECK(std::hash<byte_binary_json> {}(j) == std::hash<byte_binary_json> {}(j));
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CHECK(byte_binary_json::from_cbor(byte_binary_json::to_cbor(j)) == j);
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CHECK(byte_binary_json::from_msgpack(byte_binary_json::to_msgpack(j)) == j);
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// UBJSON has no binary type, so binary values are written as an array
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CHECK(byte_binary_json::from_ubjson(byte_binary_json::to_ubjson(j)) == byte_binary_json({0, 1, 255}));
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// the same holds for BON8
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CHECK(byte_binary_json::from_bon8(byte_binary_json::to_bon8(j)) == byte_binary_json({0, 1, 255}));
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}
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#endif
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}
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