json/test/src/unit-reference_access.cpp

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/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++ (test suite)
2019-07-28 18:20:41 +00:00
| | |__ | | | | | | version 3.7.0
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
SPDX-License-Identifier: MIT
2019-03-19 23:19:07 +00:00
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"
DOCTEST_GCC_SUPPRESS_WARNING("-Wfloat-equal")
#include <nlohmann/json.hpp>
using nlohmann::json;
TEST_CASE("reference access")
{
// create a JSON value with different types
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
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is object");
}
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 test_type& 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
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
CHECK_NOTHROW(value.get_ref<json::array_t&>());
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is array");
}
SECTION("reference access to string_t")
{
using test_type = json::string_t;
json value = "hello";
// check if references are returned correctly
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
CHECK_THROWS_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
CHECK_NOTHROW(value.get_ref<json::string_t&>());
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is string");
}
SECTION("reference access to boolean_t")
{
using test_type = json::boolean_t;
json value = false;
// check if references are returned correctly
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
CHECK_THROWS_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
CHECK_NOTHROW(value.get_ref<json::boolean_t&>());
CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is boolean");
}
SECTION("reference access to number_integer_t")
{
using test_type = json::number_integer_t;
json value = -23;
// check if references are returned correctly
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_NOTHROW(value.get_ref<json::number_integer_t&>());
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
}
SECTION("reference access to number_unsigned_t")
{
using test_type = json::number_unsigned_t;
json value = 23u;
// check if references are returned correctly
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
//CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
//CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
// "[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_NOTHROW(value.get_ref<json::number_unsigned_t&>());
CHECK_THROWS_AS(value.get_ref<json::number_float_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_float_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
}
SECTION("reference access to number_float_t")
{
using test_type = json::number_float_t;
json value = 42.23;
// check if references are returned correctly
test_type& p1 = value.get_ref<test_type&>();
CHECK(&p1 == value.get_ptr<test_type*>());
CHECK(p1 == value.get<test_type>());
const test_type& 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_AS(value.get_ref<json::object_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::object_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::array_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::array_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::string_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::string_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::boolean_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::boolean_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::number_integer_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_integer_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_THROWS_AS(value.get_ref<json::number_unsigned_t&>(), json::type_error&);
CHECK_THROWS_WITH(value.get_ref<json::number_unsigned_t&>(),
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"[json.exception.type_error.303] incompatible ReferenceType for get_ref, actual type is number");
CHECK_NOTHROW(value.get_ref<json::number_float_t&>());
}
}