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json/test/src/unit-iterators2.cpp

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reorganization into smaller test units
2016-08-04 20:51:08 +00:00
/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++ (test suite)
| | |__ | | | | | | version 2.0.2
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
Copyright (c) 2013-2016 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 "catch.hpp"
#include "json.hpp"
using nlohmann::json;
TEST_CASE("iterators 2")
{
SECTION("iterator comparisons")
{
json j_values = {nullptr, true, 42, 42u, 23.23, {{"one", 1}, {"two", 2}}, {1, 2, 3, 4, 5}, "Hello, world"};
for (json& j : j_values)
{
auto it1 = j.begin();
auto it2 = j.begin();
auto it3 = j.begin();
++it2;
++it3;
++it3;
auto it1_c = j.cbegin();
auto it2_c = j.cbegin();
auto it3_c = j.cbegin();
++it2_c;
++it3_c;
++it3_c;
// comparison: equal
{
CHECK(it1 == it1);
CHECK(not (it1 == it2));
CHECK(not (it1 == it3));
CHECK(not (it2 == it3));
CHECK(it1_c == it1_c);
CHECK(not (it1_c == it2_c));
CHECK(not (it1_c == it3_c));
CHECK(not (it2_c == it3_c));
}
// comparison: not equal
{
// check definition
CHECK( (it1 != it1) == not(it1 == it1) );
CHECK( (it1 != it2) == not(it1 == it2) );
CHECK( (it1 != it3) == not(it1 == it3) );
CHECK( (it2 != it3) == not(it2 == it3) );
CHECK( (it1_c != it1_c) == not(it1_c == it1_c) );
CHECK( (it1_c != it2_c) == not(it1_c == it2_c) );
CHECK( (it1_c != it3_c) == not(it1_c == it3_c) );
CHECK( (it2_c != it3_c) == not(it2_c == it3_c) );
}
// comparison: smaller
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 < it1, std::domain_error);
CHECK_THROWS_AS(it1 < it2, std::domain_error);
CHECK_THROWS_AS(it2 < it3, std::domain_error);
CHECK_THROWS_AS(it1 < it3, std::domain_error);
CHECK_THROWS_AS(it1_c < it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c < it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c < it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c < it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 < it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 < it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 < it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 < it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c < it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it3_c, "cannot compare order of object iterators");
}
else
{
CHECK(not (it1 < it1));
CHECK(it1 < it2);
CHECK(it1 < it3);
CHECK(it2 < it3);
CHECK(not (it1_c < it1_c));
CHECK(it1_c < it2_c);
CHECK(it1_c < it3_c);
CHECK(it2_c < it3_c);
}
}
// comparison: less than or equal
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 <= it1, std::domain_error);
CHECK_THROWS_AS(it1 <= it2, std::domain_error);
CHECK_THROWS_AS(it2 <= it3, std::domain_error);
CHECK_THROWS_AS(it1 <= it3, std::domain_error);
CHECK_THROWS_AS(it1_c <= it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c <= it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c <= it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c <= it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 <= it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 <= it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 <= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 <= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c <= it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 <= it1) == not(it1 < it1) );
CHECK( (it1 <= it2) == not(it2 < it1) );
CHECK( (it1 <= it3) == not(it3 < it1) );
CHECK( (it2 <= it3) == not(it3 < it2) );
CHECK( (it1_c <= it1_c) == not(it1_c < it1_c) );
CHECK( (it1_c <= it2_c) == not(it2_c < it1_c) );
CHECK( (it1_c <= it3_c) == not(it3_c < it1_c) );
CHECK( (it2_c <= it3_c) == not(it3_c < it2_c) );
}
}
// comparison: greater than
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 > it1, std::domain_error);
CHECK_THROWS_AS(it1 > it2, std::domain_error);
CHECK_THROWS_AS(it2 > it3, std::domain_error);
CHECK_THROWS_AS(it1 > it3, std::domain_error);
CHECK_THROWS_AS(it1_c > it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c > it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c > it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c > it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 > it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 > it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 > it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 > it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c > it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 > it1) == (it1 < it1) );
CHECK( (it1 > it2) == (it2 < it1) );
CHECK( (it1 > it3) == (it3 < it1) );
CHECK( (it2 > it3) == (it3 < it2) );
CHECK( (it1_c > it1_c) == (it1_c < it1_c) );
CHECK( (it1_c > it2_c) == (it2_c < it1_c) );
CHECK( (it1_c > it3_c) == (it3_c < it1_c) );
CHECK( (it2_c > it3_c) == (it3_c < it2_c) );
}
}
// comparison: greater than or equal
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 >= it1, std::domain_error);
CHECK_THROWS_AS(it1 >= it2, std::domain_error);
CHECK_THROWS_AS(it2 >= it3, std::domain_error);
CHECK_THROWS_AS(it1 >= it3, std::domain_error);
CHECK_THROWS_AS(it1_c >= it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c >= it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c >= it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c >= it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 >= it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 >= it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 >= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 >= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c >= it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 >= it1) == not(it1 < it1) );
CHECK( (it1 >= it2) == not(it1 < it2) );
CHECK( (it1 >= it3) == not(it1 < it3) );
CHECK( (it2 >= it3) == not(it2 < it3) );
CHECK( (it1_c >= it1_c) == not(it1_c < it1_c) );
CHECK( (it1_c >= it2_c) == not(it1_c < it2_c) );
CHECK( (it1_c >= it3_c) == not(it1_c < it3_c) );
CHECK( (it2_c >= it3_c) == not(it2_c < it3_c) );
}
}
}
// check exceptions if different objects are compared
for (auto j : j_values)
{
for (auto k : j_values)
{
if (j != k)
{
CHECK_THROWS_AS(j.begin() == k.begin(), std::domain_error);
CHECK_THROWS_AS(j.cbegin() == k.cbegin(), std::domain_error);
CHECK_THROWS_WITH(j.begin() == k.begin(), "cannot compare iterators of different containers");
CHECK_THROWS_WITH(j.cbegin() == k.cbegin(), "cannot compare iterators of different containers");
CHECK_THROWS_AS(j.begin() < k.begin(), std::domain_error);
CHECK_THROWS_AS(j.cbegin() < k.cbegin(), std::domain_error);
CHECK_THROWS_WITH(j.begin() < k.begin(), "cannot compare iterators of different containers");
CHECK_THROWS_WITH(j.cbegin() < k.cbegin(), "cannot compare iterators of different containers");
}
}
}
}
SECTION("iterator arithmetic")
{
json j_object = {{"one", 1}, {"two", 2}, {"three", 3}};
json j_array = {1, 2, 3, 4, 5, 6};
json j_null = nullptr;
json j_value = 42;
SECTION("addition and subtraction")
{
SECTION("object")
{
{
auto it = j_object.begin();
CHECK_THROWS_AS(it += 1, std::domain_error);
CHECK_THROWS_WITH(it += 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it += 1, std::domain_error);
CHECK_THROWS_WITH(it += 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.begin();
CHECK_THROWS_AS(it + 1, std::domain_error);
CHECK_THROWS_WITH(it + 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it + 1, std::domain_error);
CHECK_THROWS_WITH(it + 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.begin();
CHECK_THROWS_AS(it -= 1, std::domain_error);
CHECK_THROWS_WITH(it -= 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it -= 1, std::domain_error);
CHECK_THROWS_WITH(it -= 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.begin();
CHECK_THROWS_AS(it - 1, std::domain_error);
CHECK_THROWS_WITH(it - 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it - 1, std::domain_error);
CHECK_THROWS_WITH(it - 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.begin();
CHECK_THROWS_AS(it - it, std::domain_error);
CHECK_THROWS_WITH(it - it, "cannot use offsets with object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it - it, std::domain_error);
CHECK_THROWS_WITH(it - it, "cannot use offsets with object iterators");
}
}
SECTION("array")
{
{
auto it = j_array.begin();
it += 3;
CHECK((j_array.begin() + 3) == it);
CHECK((it - 3) == j_array.begin());
CHECK((it - j_array.begin()) == 3);
CHECK(*it == json(4));
it -= 2;
CHECK(*it == json(2));
}
{
auto it = j_array.cbegin();
it += 3;
CHECK((j_array.cbegin() + 3) == it);
CHECK((it - 3) == j_array.cbegin());
CHECK((it - j_array.cbegin()) == 3);
CHECK(*it == json(4));
it -= 2;
CHECK(*it == json(2));
}
}
SECTION("null")
{
{
auto it = j_null.begin();
it += 3;
CHECK((j_null.begin() + 3) == it);
CHECK((it - 3) == j_null.begin());
CHECK((it - j_null.begin()) == 3);
CHECK(it != j_null.end());
it -= 3;
CHECK(it == j_null.end());
}
{
auto it = j_null.cbegin();
it += 3;
CHECK((j_null.cbegin() + 3) == it);
CHECK((it - 3) == j_null.cbegin());
CHECK((it - j_null.cbegin()) == 3);
CHECK(it != j_null.cend());
it -= 3;
CHECK(it == j_null.cend());
}
}
SECTION("value")
{
{
auto it = j_value.begin();
it += 3;
CHECK((j_value.begin() + 3) == it);
CHECK((it - 3) == j_value.begin());
CHECK((it - j_value.begin()) == 3);
CHECK(it != j_value.end());
it -= 3;
CHECK(*it == json(42));
}
{
auto it = j_value.cbegin();
it += 3;
CHECK((j_value.cbegin() + 3) == it);
CHECK((it - 3) == j_value.cbegin());
CHECK((it - j_value.cbegin()) == 3);
CHECK(it != j_value.cend());
it -= 3;
CHECK(*it == json(42));
}
}
}
SECTION("subscript operator")
{
SECTION("object")
{
{
auto it = j_object.begin();
CHECK_THROWS_AS(it[0], std::domain_error);
CHECK_THROWS_AS(it[1], std::domain_error);
CHECK_THROWS_WITH(it[0], "cannot use operator[] for object iterators");
CHECK_THROWS_WITH(it[1], "cannot use operator[] for object iterators");
}
{
auto it = j_object.cbegin();
CHECK_THROWS_AS(it[0], std::domain_error);
CHECK_THROWS_AS(it[1], std::domain_error);
CHECK_THROWS_WITH(it[0], "cannot use operator[] for object iterators");
CHECK_THROWS_WITH(it[1], "cannot use operator[] for object iterators");
}
}
SECTION("array")
{
{
auto it = j_array.begin();
CHECK(it[0] == json(1));
CHECK(it[1] == json(2));
CHECK(it[2] == json(3));
CHECK(it[3] == json(4));
CHECK(it[4] == json(5));
CHECK(it[5] == json(6));
}
{
auto it = j_array.cbegin();
CHECK(it[0] == json(1));
CHECK(it[1] == json(2));
CHECK(it[2] == json(3));
CHECK(it[3] == json(4));
CHECK(it[4] == json(5));
CHECK(it[5] == json(6));
}
}
SECTION("null")
{
{
auto it = j_null.begin();
CHECK_THROWS_AS(it[0], std::out_of_range);
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[0], "cannot get value");
CHECK_THROWS_WITH(it[1], "cannot get value");
}
{
auto it = j_null.cbegin();
CHECK_THROWS_AS(it[0], std::out_of_range);
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[0], "cannot get value");
CHECK_THROWS_WITH(it[1], "cannot get value");
}
}
SECTION("value")
{
{
auto it = j_value.begin();
CHECK(it[0] == json(42));
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[1], "cannot get value");
}
{
auto it = j_value.cbegin();
CHECK(it[0] == json(42));
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[1], "cannot get value");
}
}
}
}
SECTION("reverse iterator comparisons")
{
json j_values = {nullptr, true, 42, 42u, 23.23, {{"one", 1}, {"two", 2}}, {1, 2, 3, 4, 5}, "Hello, world"};
for (json& j : j_values)
{
auto it1 = j.rbegin();
auto it2 = j.rbegin();
auto it3 = j.rbegin();
++it2;
++it3;
++it3;
auto it1_c = j.crbegin();
auto it2_c = j.crbegin();
auto it3_c = j.crbegin();
++it2_c;
++it3_c;
++it3_c;
// comparison: equal
{
CHECK(it1 == it1);
CHECK(not (it1 == it2));
CHECK(not (it1 == it3));
CHECK(not (it2 == it3));
CHECK(it1_c == it1_c);
CHECK(not (it1_c == it2_c));
CHECK(not (it1_c == it3_c));
CHECK(not (it2_c == it3_c));
}
// comparison: not equal
{
// check definition
CHECK( (it1 != it1) == not(it1 == it1) );
CHECK( (it1 != it2) == not(it1 == it2) );
CHECK( (it1 != it3) == not(it1 == it3) );
CHECK( (it2 != it3) == not(it2 == it3) );
CHECK( (it1_c != it1_c) == not(it1_c == it1_c) );
CHECK( (it1_c != it2_c) == not(it1_c == it2_c) );
CHECK( (it1_c != it3_c) == not(it1_c == it3_c) );
CHECK( (it2_c != it3_c) == not(it2_c == it3_c) );
}
// comparison: smaller
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 < it1, std::domain_error);
CHECK_THROWS_AS(it1 < it2, std::domain_error);
CHECK_THROWS_AS(it2 < it3, std::domain_error);
CHECK_THROWS_AS(it1 < it3, std::domain_error);
CHECK_THROWS_AS(it1_c < it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c < it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c < it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c < it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 < it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 < it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 < it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 < it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c < it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c < it3_c, "cannot compare order of object iterators");
}
else
{
CHECK(not (it1 < it1));
CHECK(it1 < it2);
CHECK(it1 < it3);
CHECK(it2 < it3);
CHECK(not (it1_c < it1_c));
CHECK(it1_c < it2_c);
CHECK(it1_c < it3_c);
CHECK(it2_c < it3_c);
}
}
// comparison: less than or equal
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 <= it1, std::domain_error);
CHECK_THROWS_AS(it1 <= it2, std::domain_error);
CHECK_THROWS_AS(it2 <= it3, std::domain_error);
CHECK_THROWS_AS(it1 <= it3, std::domain_error);
CHECK_THROWS_AS(it1_c <= it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c <= it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c <= it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c <= it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 <= it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 <= it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 <= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 <= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c <= it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c <= it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 <= it1) == not(it1 < it1) );
CHECK( (it1 <= it2) == not(it2 < it1) );
CHECK( (it1 <= it3) == not(it3 < it1) );
CHECK( (it2 <= it3) == not(it3 < it2) );
CHECK( (it1_c <= it1_c) == not(it1_c < it1_c) );
CHECK( (it1_c <= it2_c) == not(it2_c < it1_c) );
CHECK( (it1_c <= it3_c) == not(it3_c < it1_c) );
CHECK( (it2_c <= it3_c) == not(it3_c < it2_c) );
}
}
// comparison: greater than
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 > it1, std::domain_error);
CHECK_THROWS_AS(it1 > it2, std::domain_error);
CHECK_THROWS_AS(it2 > it3, std::domain_error);
CHECK_THROWS_AS(it1 > it3, std::domain_error);
CHECK_THROWS_AS(it1_c > it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c > it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c > it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c > it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 > it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 > it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 > it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 > it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c > it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c > it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 > it1) == (it1 < it1) );
CHECK( (it1 > it2) == (it2 < it1) );
CHECK( (it1 > it3) == (it3 < it1) );
CHECK( (it2 > it3) == (it3 < it2) );
CHECK( (it1_c > it1_c) == (it1_c < it1_c) );
CHECK( (it1_c > it2_c) == (it2_c < it1_c) );
CHECK( (it1_c > it3_c) == (it3_c < it1_c) );
CHECK( (it2_c > it3_c) == (it3_c < it2_c) );
}
}
// comparison: greater than or equal
{
if (j.type() == json::value_t::object)
{
CHECK_THROWS_AS(it1 >= it1, std::domain_error);
CHECK_THROWS_AS(it1 >= it2, std::domain_error);
CHECK_THROWS_AS(it2 >= it3, std::domain_error);
CHECK_THROWS_AS(it1 >= it3, std::domain_error);
CHECK_THROWS_AS(it1_c >= it1_c, std::domain_error);
CHECK_THROWS_AS(it1_c >= it2_c, std::domain_error);
CHECK_THROWS_AS(it2_c >= it3_c, std::domain_error);
CHECK_THROWS_AS(it1_c >= it3_c, std::domain_error);
CHECK_THROWS_WITH(it1 >= it1, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 >= it2, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2 >= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1 >= it3, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it1_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it2_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it2_c >= it3_c, "cannot compare order of object iterators");
CHECK_THROWS_WITH(it1_c >= it3_c, "cannot compare order of object iterators");
}
else
{
// check definition
CHECK( (it1 >= it1) == not(it1 < it1) );
CHECK( (it1 >= it2) == not(it1 < it2) );
CHECK( (it1 >= it3) == not(it1 < it3) );
CHECK( (it2 >= it3) == not(it2 < it3) );
CHECK( (it1_c >= it1_c) == not(it1_c < it1_c) );
CHECK( (it1_c >= it2_c) == not(it1_c < it2_c) );
CHECK( (it1_c >= it3_c) == not(it1_c < it3_c) );
CHECK( (it2_c >= it3_c) == not(it2_c < it3_c) );
}
}
}
// check exceptions if different objects are compared
for (auto j : j_values)
{
for (auto k : j_values)
{
if (j != k)
{
CHECK_THROWS_AS(j.rbegin() == k.rbegin(), std::domain_error);
CHECK_THROWS_AS(j.crbegin() == k.crbegin(), std::domain_error);
CHECK_THROWS_WITH(j.rbegin() == k.rbegin(), "cannot compare iterators of different containers");
CHECK_THROWS_WITH(j.crbegin() == k.crbegin(), "cannot compare iterators of different containers");
CHECK_THROWS_AS(j.rbegin() < k.rbegin(), std::domain_error);
CHECK_THROWS_AS(j.crbegin() < k.crbegin(), std::domain_error);
CHECK_THROWS_WITH(j.rbegin() < k.rbegin(), "cannot compare iterators of different containers");
CHECK_THROWS_WITH(j.crbegin() < k.crbegin(), "cannot compare iterators of different containers");
}
}
}
}
SECTION("reverse iterator arithmetic")
{
json j_object = {{"one", 1}, {"two", 2}, {"three", 3}};
json j_array = {1, 2, 3, 4, 5, 6};
json j_null = nullptr;
json j_value = 42;
SECTION("addition and subtraction")
{
SECTION("object")
{
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it += 1, std::domain_error);
CHECK_THROWS_WITH(it += 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it += 1, std::domain_error);
CHECK_THROWS_WITH(it += 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it + 1, std::domain_error);
CHECK_THROWS_WITH(it + 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it + 1, std::domain_error);
CHECK_THROWS_WITH(it + 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it -= 1, std::domain_error);
CHECK_THROWS_WITH(it -= 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it -= 1, std::domain_error);
CHECK_THROWS_WITH(it -= 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it - 1, std::domain_error);
CHECK_THROWS_WITH(it - 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it - 1, std::domain_error);
CHECK_THROWS_WITH(it - 1, "cannot use offsets with object iterators");
}
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it - it, std::domain_error);
CHECK_THROWS_WITH(it - it, "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it - it, std::domain_error);
CHECK_THROWS_WITH(it - it, "cannot use offsets with object iterators");
}
}
SECTION("array")
{
{
auto it = j_array.rbegin();
it += 3;
CHECK((j_array.rbegin() + 3) == it);
CHECK((it - 3) == j_array.rbegin());
CHECK((j_array.rbegin() - it) == 3);
CHECK(*it == json(3));
it -= 2;
CHECK(*it == json(5));
}
{
auto it = j_array.crbegin();
it += 3;
CHECK((j_array.crbegin() + 3) == it);
CHECK((it - 3) == j_array.crbegin());
CHECK((j_array.crbegin() - it) == 3);
CHECK(*it == json(3));
it -= 2;
CHECK(*it == json(5));
}
}
SECTION("null")
{
{
auto it = j_null.rbegin();
it += 3;
CHECK((j_null.rbegin() + 3) == it);
CHECK((it - 3) == j_null.rbegin());
CHECK((j_null.rbegin() - it) == 3);
CHECK(it != j_null.rend());
it -= 3;
CHECK(it == j_null.rend());
}
{
auto it = j_null.crbegin();
it += 3;
CHECK((j_null.crbegin() + 3) == it);
CHECK((it - 3) == j_null.crbegin());
CHECK((j_null.crbegin() - it) == 3);
CHECK(it != j_null.crend());
it -= 3;
CHECK(it == j_null.crend());
}
}
SECTION("value")
{
{
auto it = j_value.rbegin();
it += 3;
CHECK((j_value.rbegin() + 3) == it);
CHECK((it - 3) == j_value.rbegin());
CHECK((j_value.rbegin() - it) == 3);
CHECK(it != j_value.rend());
it -= 3;
CHECK(*it == json(42));
}
{
auto it = j_value.crbegin();
it += 3;
CHECK((j_value.crbegin() + 3) == it);
CHECK((it - 3) == j_value.crbegin());
CHECK((j_value.crbegin() - it) == 3);
CHECK(it != j_value.crend());
it -= 3;
CHECK(*it == json(42));
}
}
}
SECTION("subscript operator")
{
SECTION("object")
{
{
auto it = j_object.rbegin();
CHECK_THROWS_AS(it[0], std::domain_error);
CHECK_THROWS_AS(it[1], std::domain_error);
CHECK_THROWS_WITH(it[0], "cannot use offsets with object iterators");
CHECK_THROWS_WITH(it[1], "cannot use offsets with object iterators");
}
{
auto it = j_object.crbegin();
CHECK_THROWS_AS(it[0], std::domain_error);
CHECK_THROWS_AS(it[1], std::domain_error);
CHECK_THROWS_WITH(it[0], "cannot use offsets with object iterators");
CHECK_THROWS_WITH(it[1], "cannot use offsets with object iterators");
}
}
SECTION("array")
{
{
auto it = j_array.rbegin();
CHECK(it[0] == json(6));
CHECK(it[1] == json(5));
CHECK(it[2] == json(4));
CHECK(it[3] == json(3));
CHECK(it[4] == json(2));
CHECK(it[5] == json(1));
}
{
auto it = j_array.crbegin();
CHECK(it[0] == json(6));
CHECK(it[1] == json(5));
CHECK(it[2] == json(4));
CHECK(it[3] == json(3));
CHECK(it[4] == json(2));
CHECK(it[5] == json(1));
}
}
SECTION("null")
{
{
auto it = j_null.rbegin();
CHECK_THROWS_AS(it[0], std::out_of_range);
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[0], "cannot get value");
CHECK_THROWS_WITH(it[1], "cannot get value");
}
{
auto it = j_null.crbegin();
CHECK_THROWS_AS(it[0], std::out_of_range);
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[0], "cannot get value");
CHECK_THROWS_WITH(it[1], "cannot get value");
}
}
SECTION("value")
{
{
auto it = j_value.rbegin();
CHECK(it[0] == json(42));
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[1], "cannot get value");
}
{
auto it = j_value.crbegin();
CHECK(it[0] == json(42));
CHECK_THROWS_AS(it[1], std::out_of_range);
CHECK_THROWS_WITH(it[1], "cannot get value");
}
}
}
}
}
Reference in a new issue Copy permalink