amorfo77/json
1
0
Fork 0
mirror of https://github.com/nlohmann/json.git synced 2026-05-30 01:55:24 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
af3f87e84e63e883701502f5c6338d025593362b
json/tests/src/unit-reference_access.cpp
T
Niels Lohmann af3f87e84e 🎨 use Clang-Format
2023-11-29 21:46:01 +01:00

288 lines
15 KiB
C++
Raw Blame History

// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.11.3
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2023 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT
#include "doctest_compatibility.h"
#include <nlohmann/json.hpp>
using nlohmann::json;
TEST_CASE("reference access")
{
// create a JSON value with different types
const json json_types = { { "boolean", true },
{ "number", { { "integer", 42 }, { "floating-point", 17.23 } } },
{ "string", "Hello, world!" },
{ "array", { 1, 2, 3, 4, 5 } },
{ "null", nullptr } };
SECTION("reference access to object_t")
{
using test_type = json::object_t;
json value = { { "one", 1 }, { "two", 2 } };
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_NOTHROW(value.get_ref<json::object_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object",
json::type_error&);
}
SECTION("const reference access to const object_t")
{
using test_type = json::object_t;
const json value = { { "one", 1 }, { "two", 2 } };
// this should not compile
// test_type& p1 = value.get_ref<test_type&>();
// check if references are returned correctly
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
}
SECTION("reference access to array_t")
{
using test_type = json::array_t;
json value = { 1, 2, 3, 4 };
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
CHECK_NOTHROW(value.get_ref<json::array_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array",
json::type_error&);
}
SECTION("reference access to string_t")
{
using test_type = json::string_t;
json value = "hello";
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
CHECK_NOTHROW(value.get_ref<json::string_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string",
json::type_error&);
}
SECTION("reference access to boolean_t")
{
using test_type = json::boolean_t;
json value = false;
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
CHECK_NOTHROW(value.get_ref<json::boolean_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean",
json::type_error&);
}
SECTION("reference access to number_integer_t")
{
using test_type = json::number_integer_t;
json value = -23;
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_NOTHROW(value.get_ref<json::number_integer_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
}
SECTION("reference access to number_unsigned_t")
{
using test_type = json::number_unsigned_t;
json value = 23u;
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
//CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
// "[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number", json::type_error&);
CHECK_NOTHROW(value.get_ref<json::number_unsigned_t&>());
CHECK_THROWS_WITH_AS(value.get_ref<json::number_float_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
}
SECTION("reference access to number_float_t")
{
using test_type = json::number_float_t;
json value = 42.23;
// check if references are returned correctly
auto& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const auto& p2 = value.get_ref<const test_type&>();
CHECK(&p2 == value.get_ptr<const test_type*>());
CHECK(p2 == value.get<test_type>());
// check if mismatching references throw correctly
CHECK_THROWS_WITH_AS(value.get_ref<json::object_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::array_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::string_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::boolean_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_integer_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_THROWS_WITH_AS(value.get_ref<json::number_unsigned_t&>(),
"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number",
json::type_error&);
CHECK_NOTHROW(value.get_ref<json::number_float_t&>());
}
}
Reference in New Issue View Git Blame Copy Permalink