/* __ _____ _____ _____ __| | __| | | | JSON for Modern C++ (test suite) | | |__ | | | | | | version 2.1.0 |_____|_____|_____|_|___| https://github.com/nlohmann/json Licensed under the MIT License . Copyright (c) 2013-2017 Niels Lohmann . 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 "catch.hpp" #include "json.hpp" using nlohmann::json; TEST_CASE("modifiers") { SECTION("clear()") { SECTION("boolean") { json j = true; j.clear(); CHECK(j == json(json::value_t::boolean)); } SECTION("string") { json j = "hello world"; j.clear(); CHECK(j == json(json::value_t::string)); } SECTION("array") { SECTION("empty array") { json j = json::array(); j.clear(); CHECK(j.empty()); CHECK(j == json(json::value_t::array)); } SECTION("filled array") { json j = {1, 2, 3}; j.clear(); CHECK(j.empty()); CHECK(j == json(json::value_t::array)); } } SECTION("object") { SECTION("empty object") { json j = json::object(); j.clear(); CHECK(j.empty()); CHECK(j == json(json::value_t::object)); } SECTION("filled object") { json j = {{"one", 1}, {"two", 2}, {"three", 3}}; j.clear(); CHECK(j.empty()); CHECK(j == json(json::value_t::object)); } } SECTION("number (integer)") { json j = 23; j.clear(); CHECK(j == json(json::value_t::number_integer)); } SECTION("number (unsigned)") { json j = 23u; j.clear(); CHECK(j == json(json::value_t::number_integer)); } SECTION("number (float)") { json j = 23.42; j.clear(); CHECK(j == json(json::value_t::number_float)); } SECTION("null") { json j = nullptr; j.clear(); CHECK(j == json(json::value_t::null)); } } SECTION("push_back()") { SECTION("to array") { SECTION("json&&") { SECTION("null") { json j; j.push_back(1); j.push_back(2); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2})); } SECTION("array") { json j = {1, 2, 3}; j.push_back("Hello"); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2, 3, "Hello"})); } SECTION("other type") { json j = 1; CHECK_THROWS_AS(j.push_back("Hello"), std::domain_error); CHECK_THROWS_WITH(j.push_back("Hello"), "cannot use push_back() with number"); } } SECTION("const json&") { SECTION("null") { json j; json k(1); j.push_back(k); j.push_back(k); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 1})); } SECTION("array") { json j = {1, 2, 3}; json k("Hello"); j.push_back(k); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2, 3, "Hello"})); } SECTION("other type") { json j = 1; json k("Hello"); CHECK_THROWS_AS(j.push_back(k), std::domain_error); CHECK_THROWS_WITH(j.push_back(k), "cannot use push_back() with number"); } } } SECTION("to object") { SECTION("null") { json j; j.push_back(json::object_t::value_type({"one", 1})); j.push_back(json::object_t::value_type({"two", 2})); CHECK(j.type() == json::value_t::object); CHECK(j.size() == 2); CHECK(j["one"] == json(1)); CHECK(j["two"] == json(2)); } SECTION("object") { json j(json::value_t::object); j.push_back(json::object_t::value_type({"one", 1})); j.push_back(json::object_t::value_type({"two", 2})); CHECK(j.size() == 2); CHECK(j["one"] == json(1)); CHECK(j["two"] == json(2)); } SECTION("other type") { json j = 1; json k("Hello"); CHECK_THROWS_AS(j.push_back(json::object_t::value_type({"one", 1})), std::domain_error); CHECK_THROWS_WITH(j.push_back(json::object_t::value_type({"one", 1})), "cannot use push_back() with number"); } } SECTION("with initializer_list") { SECTION("null") { json j; j.push_back({"foo", "bar"}); CHECK(j == json::array({{"foo", "bar"}})); json k; k.push_back({1, 2, 3}); CHECK(k == json::array({{1, 2, 3}})); } SECTION("array") { json j = {1, 2, 3}; j.push_back({"foo", "bar"}); CHECK(j == json({1, 2, 3, {"foo", "bar"}})); json k = {1, 2, 3}; k.push_back({1, 2, 3}); CHECK(k == json({1, 2, 3, {1, 2, 3}})); } SECTION("object") { json j = {{"key1", 1}}; j.push_back({"key2", "bar"}); CHECK(j == json({{"key1", 1}, {"key2", "bar"}})); json k = {{"key1", 1}}; CHECK_THROWS_AS(k.push_back({1, 2, 3, 4}), std::domain_error); CHECK_THROWS_WITH(k.push_back({1, 2, 3, 4}), "cannot use push_back() with object"); } } } SECTION("emplace_back()") { SECTION("to array") { SECTION("null") { json j; j.emplace_back(1); j.emplace_back(2); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2})); } SECTION("array") { json j = {1, 2, 3}; j.emplace_back("Hello"); CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2, 3, "Hello"})); } SECTION("multiple values") { json j; j.emplace_back(3, "foo"); CHECK(j.type() == json::value_t::array); CHECK(j == json({{"foo", "foo", "foo"}})); } } SECTION("other type") { json j = 1; CHECK_THROWS_AS(j.emplace_back("Hello"), std::domain_error); CHECK_THROWS_WITH(j.emplace_back("Hello"), "cannot use emplace_back() with number"); } } SECTION("emplace()") { SECTION("to object") { SECTION("null") { // start with a null value json j; // add a new key auto res1 = j.emplace("foo", "bar"); CHECK(res1.second == true); CHECK(*res1.first == "bar"); // the null value is changed to an object CHECK(j.type() == json::value_t::object); // add a new key auto res2 = j.emplace("baz", "bam"); CHECK(res2.second == true); CHECK(*res2.first == "bam"); // we try to insert at given key - no change auto res3 = j.emplace("baz", "bad"); CHECK(res3.second == false); CHECK(*res3.first == "bam"); // the final object CHECK(j == json({{"baz", "bam"}, {"foo", "bar"}})); } SECTION("object") { // start with an object json j = {{"foo", "bar"}}; // add a new key auto res1 = j.emplace("baz", "bam"); CHECK(res1.second == true); CHECK(*res1.first == "bam"); // add an existing key auto res2 = j.emplace("foo", "bad"); CHECK(res2.second == false); CHECK(*res2.first == "bar"); // check final object CHECK(j == json({{"baz", "bam"}, {"foo", "bar"}})); } } SECTION("other type") { json j = 1; CHECK_THROWS_AS(j.emplace("foo", "bar"), std::domain_error); CHECK_THROWS_WITH(j.emplace("foo", "bar"), "cannot use emplace() with number"); } } SECTION("operator+=") { SECTION("to array") { SECTION("json&&") { SECTION("null") { json j; j += 1; j += 2; CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2})); } SECTION("array") { json j = {1, 2, 3}; j += "Hello"; CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2, 3, "Hello"})); } SECTION("other type") { json j = 1; CHECK_THROWS_AS(j += "Hello", std::domain_error); CHECK_THROWS_WITH(j += "Hello", "cannot use push_back() with number"); } } SECTION("const json&") { SECTION("null") { json j; json k(1); j += k; j += k; CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 1})); } SECTION("array") { json j = {1, 2, 3}; json k("Hello"); j += k; CHECK(j.type() == json::value_t::array); CHECK(j == json({1, 2, 3, "Hello"})); } SECTION("other type") { json j = 1; json k("Hello"); CHECK_THROWS_AS(j += k, std::domain_error); CHECK_THROWS_WITH(j += k, "cannot use push_back() with number"); } } } SECTION("to object") { SECTION("null") { json j; j += json::object_t::value_type({"one", 1}); j += json::object_t::value_type({"two", 2}); CHECK(j.type() == json::value_t::object); CHECK(j.size() == 2); CHECK(j["one"] == json(1)); CHECK(j["two"] == json(2)); } SECTION("object") { json j(json::value_t::object); j += json::object_t::value_type({"one", 1}); j += json::object_t::value_type({"two", 2}); CHECK(j.size() == 2); CHECK(j["one"] == json(1)); CHECK(j["two"] == json(2)); } SECTION("other type") { json j = 1; json k("Hello"); CHECK_THROWS_AS(j += json::object_t::value_type({"one", 1}), std::domain_error); CHECK_THROWS_WITH(j += json::object_t::value_type({"one", 1}), "cannot use push_back() with number"); } } SECTION("with initializer_list") { SECTION("null") { json j; j += {"foo", "bar"}; CHECK(j == json::array({{"foo", "bar"}})); json k; k += {1, 2, 3}; CHECK(k == json::array({{1, 2, 3}})); } SECTION("array") { json j = {1, 2, 3}; j += {"foo", "bar"}; CHECK(j == json({1, 2, 3, {"foo", "bar"}})); json k = {1, 2, 3}; k += {1, 2, 3}; CHECK(k == json({1, 2, 3, {1, 2, 3}})); } SECTION("object") { json j = {{"key1", 1}}; j += {"key2", "bar"}; CHECK(j == json({{"key1", 1}, {"key2", "bar"}})); json k = {{"key1", 1}}; CHECK_THROWS_AS((k += {1, 2, 3, 4}), std::domain_error); CHECK_THROWS_WITH((k += {1, 2, 3, 4}), "cannot use push_back() with object"); } } } SECTION("insert") { json j_array = {1, 2, 3, 4}; json j_value = 5; SECTION("value at position") { SECTION("insert before begin()") { auto it = j_array.insert(j_array.begin(), j_value); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK(j_array.begin() == it); CHECK(j_array == json({5, 1, 2, 3, 4})); } SECTION("insert in the middle") { auto it = j_array.insert(j_array.begin() + 2, j_value); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK((it - j_array.begin()) == 2); CHECK(j_array == json({1, 2, 5, 3, 4})); } SECTION("insert before end()") { auto it = j_array.insert(j_array.end(), j_value); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK((j_array.end() - it) == 1); CHECK(j_array == json({1, 2, 3, 4, 5})); } } SECTION("rvalue at position") { SECTION("insert before begin()") { auto it = j_array.insert(j_array.begin(), 5); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK(j_array.begin() == it); CHECK(j_array == json({5, 1, 2, 3, 4})); } SECTION("insert in the middle") { auto it = j_array.insert(j_array.begin() + 2, 5); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK((it - j_array.begin()) == 2); CHECK(j_array == json({1, 2, 5, 3, 4})); } SECTION("insert before end()") { auto it = j_array.insert(j_array.end(), 5); CHECK(j_array.size() == 5); CHECK(*it == j_value); CHECK((j_array.end() - it) == 1); CHECK(j_array == json({1, 2, 3, 4, 5})); } } SECTION("copies at position") { SECTION("insert before begin()") { auto it = j_array.insert(j_array.begin(), 3, 5); CHECK(j_array.size() == 7); CHECK(*it == j_value); CHECK(j_array.begin() == it); CHECK(j_array == json({5, 5, 5, 1, 2, 3, 4})); } SECTION("insert in the middle") { auto it = j_array.insert(j_array.begin() + 2, 3, 5); CHECK(j_array.size() == 7); CHECK(*it == j_value); CHECK((it - j_array.begin()) == 2); CHECK(j_array == json({1, 2, 5, 5, 5, 3, 4})); } SECTION("insert before end()") { auto it = j_array.insert(j_array.end(), 3, 5); CHECK(j_array.size() == 7); CHECK(*it == j_value); CHECK((j_array.end() - it) == 3); CHECK(j_array == json({1, 2, 3, 4, 5, 5, 5})); } SECTION("insert nothing (count = 0)") { auto pos = j_array.end(); auto it = j_array.insert(j_array.end(), 0, 5); CHECK(j_array.size() == 4); CHECK(it == pos); CHECK(j_array == json({1, 2, 3, 4})); } } SECTION("range") { json j_other_array = {"first", "second"}; SECTION("proper usage") { auto it = j_array.insert(j_array.end(), j_other_array.begin(), j_other_array.end()); CHECK(j_array.size() == 6); CHECK(*it == *j_other_array.begin()); CHECK((j_array.end() - it) == 2); CHECK(j_array == json({1, 2, 3, 4, "first", "second"})); } SECTION("empty range") { auto it = j_array.insert(j_array.end(), j_other_array.begin(), j_other_array.begin()); CHECK(j_array.size() == 4); CHECK(it == j_array.end()); CHECK(j_array == json({1, 2, 3, 4})); } SECTION("invalid iterators") { json j_other_array2 = {"first", "second"}; CHECK_THROWS_AS(j_array.insert(j_array.end(), j_array.begin(), j_array.end()), std::domain_error); CHECK_THROWS_AS(j_array.insert(j_array.end(), j_other_array.begin(), j_other_array2.end()), std::domain_error); CHECK_THROWS_WITH(j_array.insert(j_array.end(), j_array.begin(), j_array.end()), "passed iterators may not belong to container"); CHECK_THROWS_WITH(j_array.insert(j_array.end(), j_other_array.begin(), j_other_array2.end()), "iterators do not fit"); } } SECTION("initializer list at position") { SECTION("insert before begin()") { auto it = j_array.insert(j_array.begin(), {7, 8, 9}); CHECK(j_array.size() == 7); CHECK(*it == json(7)); CHECK(j_array.begin() == it); CHECK(j_array == json({7, 8, 9, 1, 2, 3, 4})); } SECTION("insert in the middle") { auto it = j_array.insert(j_array.begin() + 2, {7, 8, 9}); CHECK(j_array.size() == 7); CHECK(*it == json(7)); CHECK((it - j_array.begin()) == 2); CHECK(j_array == json({1, 2, 7, 8, 9, 3, 4})); } SECTION("insert before end()") { auto it = j_array.insert(j_array.end(), {7, 8, 9}); CHECK(j_array.size() == 7); CHECK(*it == json(7)); CHECK((j_array.end() - it) == 3); CHECK(j_array == json({1, 2, 3, 4, 7, 8, 9})); } } SECTION("invalid iterator") { // pass iterator to a different array json j_another_array = {1, 2}; json j_yet_another_array = {"first", "second"}; CHECK_THROWS_AS(j_array.insert(j_another_array.end(), 10), std::domain_error); CHECK_THROWS_AS(j_array.insert(j_another_array.end(), j_value), std::domain_error); CHECK_THROWS_AS(j_array.insert(j_another_array.end(), 10, 11), std::domain_error); CHECK_THROWS_AS(j_array.insert(j_another_array.end(), j_yet_another_array.begin(), j_yet_another_array.end()), std::domain_error); CHECK_THROWS_AS(j_array.insert(j_another_array.end(), {1, 2, 3, 4}), std::domain_error); CHECK_THROWS_WITH(j_array.insert(j_another_array.end(), 10), "iterator does not fit current value"); CHECK_THROWS_WITH(j_array.insert(j_another_array.end(), j_value), "iterator does not fit current value"); CHECK_THROWS_WITH(j_array.insert(j_another_array.end(), 10, 11), "iterator does not fit current value"); CHECK_THROWS_WITH(j_array.insert(j_another_array.end(), j_yet_another_array.begin(), j_yet_another_array.end()), "iterator does not fit current value"); CHECK_THROWS_WITH(j_array.insert(j_another_array.end(), {1, 2, 3, 4}), "iterator does not fit current value"); } SECTION("non-array type") { // call insert on a non-array type json j_nonarray = 3; json j_yet_another_array = {"first", "second"}; CHECK_THROWS_AS(j_nonarray.insert(j_nonarray.end(), 10), std::domain_error); CHECK_THROWS_AS(j_nonarray.insert(j_nonarray.end(), j_value), std::domain_error); CHECK_THROWS_AS(j_nonarray.insert(j_nonarray.end(), 10, 11), std::domain_error); CHECK_THROWS_AS(j_nonarray.insert(j_nonarray.end(), j_yet_another_array.begin(), j_yet_another_array.end()), std::domain_error); CHECK_THROWS_AS(j_nonarray.insert(j_nonarray.end(), {1, 2, 3, 4}), std::domain_error); CHECK_THROWS_WITH(j_nonarray.insert(j_nonarray.end(), 10), "cannot use insert() with number"); CHECK_THROWS_WITH(j_nonarray.insert(j_nonarray.end(), j_value), "cannot use insert() with number"); CHECK_THROWS_WITH(j_nonarray.insert(j_nonarray.end(), 10, 11), "cannot use insert() with number"); CHECK_THROWS_WITH(j_nonarray.insert(j_nonarray.end(), j_yet_another_array.begin(), j_yet_another_array.end()), "cannot use insert() with number"); CHECK_THROWS_WITH(j_nonarray.insert(j_nonarray.end(), {1, 2, 3, 4}), "cannot use insert() with number"); } } SECTION("swap()") { SECTION("json") { SECTION("member swap") { json j("hello world"); json k(42.23); j.swap(k); CHECK(j == json(42.23)); CHECK(k == json("hello world")); } SECTION("nonmember swap") { json j("hello world"); json k(42.23); std::swap(j, k); CHECK(j == json(42.23)); CHECK(k == json("hello world")); } } SECTION("array_t") { SECTION("array_t type") { json j = {1, 2, 3, 4}; json::array_t a = {"foo", "bar", "baz"}; j.swap(a); CHECK(j == json({"foo", "bar", "baz"})); j.swap(a); CHECK(j == json({1, 2, 3, 4})); } SECTION("non-array_t type") { json j = 17; json::array_t a = {"foo", "bar", "baz"}; CHECK_THROWS_AS(j.swap(a), std::domain_error); CHECK_THROWS_WITH(j.swap(a), "cannot use swap() with number"); } } SECTION("object_t") { SECTION("object_t type") { json j = {{"one", 1}, {"two", 2}}; json::object_t o = {{"cow", "Kuh"}, {"chicken", "Huhn"}}; j.swap(o); CHECK(j == json({{"cow", "Kuh"}, {"chicken", "Huhn"}})); j.swap(o); CHECK(j == json({{"one", 1}, {"two", 2}})); } SECTION("non-object_t type") { json j = 17; json::object_t o = {{"cow", "Kuh"}, {"chicken", "Huhn"}}; CHECK_THROWS_AS(j.swap(o), std::domain_error); CHECK_THROWS_WITH(j.swap(o), "cannot use swap() with number"); } } SECTION("string_t") { SECTION("string_t type") { json j = "Hello world"; json::string_t s = "Hallo Welt"; j.swap(s); CHECK(j == json("Hallo Welt")); j.swap(s); CHECK(j == json("Hello world")); } SECTION("non-string_t type") { json j = 17; json::string_t s = "Hallo Welt"; CHECK_THROWS_AS(j.swap(s), std::domain_error); CHECK_THROWS_WITH(j.swap(s), "cannot use swap() with number"); } } } }