text: // Copyright ⓒ 2018-2021 ThePhD.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  //
  //  See https://github.com/ThePhD/out_ptr/blob/master/docs/out_ptr.adoc for documentation.
  
  #include <ztd/out_ptr/inout_ptr.hpp>
  
  #include <ficapi/ficapi.hpp>
  
  #include <catch2/catch.hpp>
  
  
  TEST_CASE("inout_ptr/exceptions/basic fail in scope", "inout_ptr does not double-delete or destroy a pointer if the C function fails") {
  	SECTION("unique_ptr<void>") {
  		std::unique_ptr<void, ficapi::deleter<>> p(nullptr);
  		ficapi_re_create(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int);
  		int* rawp = static_cast<int*>(p.get());
  		REQUIRE(rawp != nullptr);
  		REQUIRE(*rawp == ficapi_get_dynamic_data());
  		try {
  			if (ficapi_re_create_fail(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int, 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp == p.get());
  			REQUIRE(rawp != nullptr);
  			REQUIRE(*rawp == ficapi_get_dynamic_data());
  		}
  	}
  	SECTION("unique_ptr<int>") {
  		std::unique_ptr<int, ficapi::int_deleter> p(nullptr);
  		ficapi_int_re_create(ztd::out_ptr::inout_ptr(p));
  		int* rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(*rawp == ficapi_get_dynamic_data());
  		try {
  			if (ficapi_int_re_create_fail(ztd::out_ptr::inout_ptr(p), 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp == p.get());
  			REQUIRE(rawp != nullptr);
  			REQUIRE(*rawp == ficapi_get_dynamic_data());
  		}
  	}
  	SECTION("unique_ptr<ficapi::opaque>") {
  		std::unique_ptr<ficapi::opaque, ficapi::handle_deleter> p(nullptr);
  		ficapi_handle_re_create(ztd::out_ptr::inout_ptr(p));
  		ficapi::opaque_handle rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		try {
  			if (ficapi_handle_re_create_fail(ztd::out_ptr::inout_ptr(p), 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp == p.get());
  			REQUIRE(rawp != nullptr);
  			REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		}
  	}
  	SECTION("unique_ptr<ficapi::opaque>, void inout_ptr") {
  		std::unique_ptr<ficapi::opaque, ficapi::handle_deleter> p(nullptr);
  		ficapi_re_create(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_opaque);
  		ficapi::opaque_handle rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		try {
  			if (ficapi_re_create_fail(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_opaque, 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp == p.get());
  			REQUIRE(rawp != nullptr);
  			REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		}
  	}
  }
  
  TEST_CASE("inout_ptr/exceptions/stateful fail in scope", "inout_ptr type works with stateful deleters in smart pointers") {
  	SECTION("unique_ptr<void, stateful_deleter>") {
  		std::unique_ptr<void, ficapi::stateful_deleter> p(nullptr, ficapi::stateful_deleter{ 0x12345678, ficapi_type::ficapi_type_int });
  		ficapi_re_create(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int);
  		int* rawp = static_cast<int*>(p.get());
  		REQUIRE(rawp != nullptr);
  		REQUIRE(*rawp == ficapi_get_dynamic_data());
  		REQUIRE(p.get_deleter().state() == 0x12345678);
  		try {
  			if (ficapi_re_create_fail(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int, 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp != nullptr);
  			REQUIRE(*rawp == ficapi_get_dynamic_data());
  			REQUIRE(p.get_deleter().state() == 0x12345678);
  		}
  	}
  	SECTION("unique_ptr<int, stateful_deleter>") {
  		std::unique_ptr<int, ficapi::stateful_int_deleter> p(nullptr, ficapi::stateful_int_deleter{ 0x12345678 });
  		ficapi_int_re_create(ztd::out_ptr::inout_ptr(p));
  		int* rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(*rawp == ficapi_get_dynamic_data());
  		REQUIRE(p.get_deleter().state() == 0x12345678);
  		try {
  			if (ficapi_int_re_create_fail(ztd::out_ptr::inout_ptr(p), 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp != nullptr);
  			REQUIRE(*rawp == ficapi_get_dynamic_data());
  			REQUIRE(p.get_deleter().state() == 0x12345678);
  		}
  	}
  	SECTION("unique_ptr<ficapi::opaque, stateful_handle_deleter>") {
  		std::unique_ptr<ficapi::opaque, ficapi::stateful_handle_deleter> p(nullptr, ficapi::stateful_handle_deleter{ 0x12345678 });
  		ficapi_handle_re_create(ztd::out_ptr::inout_ptr(p));
  		ficapi::opaque_handle rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		REQUIRE(p.get_deleter().state() == 0x12345678);
  		try {
  			if (ficapi_handle_re_create_fail(ztd::out_ptr::inout_ptr(p), 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp != nullptr);
  			REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  			REQUIRE(p.get_deleter().state() == 0x12345678);
  		}
  	}
  	SECTION("unique_ptr<ficapi::opaque, stateful_deleter>, void inout_ptr") {
  		std::unique_ptr<ficapi::opaque, ficapi::stateful_deleter> p(nullptr, ficapi::stateful_deleter{ 0x12345678, ficapi_type::ficapi_type_int });
  		ficapi_re_create(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_opaque);
  		ficapi::opaque_handle rawp = p.get();
  		REQUIRE(rawp != nullptr);
  		REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  		REQUIRE(p.get_deleter().state() == 0x12345678);
  		try {
  			if (ficapi_re_create_fail(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_opaque, 1) != 0) {
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(rawp != nullptr);
  			REQUIRE(ficapi_handle_get_data(rawp) == ficapi_get_dynamic_data());
  			REQUIRE(p.get_deleter().state() == 0x12345678);
  		}
  	}
  }
  
  TEST_CASE("inout_ptr/exceptions/exception scope escape", "inout_ptr type properly deletes non-nullptr types from earlier") {
  	struct reused_deleter {
  		int store = 0;
  
  		void operator()(void* x) {
  			++store;
  			ficapi_delete(x, ficapi_type::ficapi_type_int);
  		}
  	};
  	struct reused_int_deleter {
  		int store = 0;
  
  		void operator()(int* x) {
  			++store;
  			ficapi_int_delete(x);
  		}
  	};
  	SECTION("unique_ptr<void, stateful_deleter>") {
  		reused_deleter deleter{};
  		try {
  			std::unique_ptr<void, std::reference_wrapper<reused_deleter>> p(nullptr, std::ref(deleter));
  
  			ficapi_re_create(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int);
  			{
  				int* rawp = static_cast<int*>(p.get());
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  			}
  			ficapi_re_create(ztd::out_ptr::inout_ptr(p), ficapi_type::ficapi_type_int);
  			{
  				int* rawp = static_cast<int*>(p.get());
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  			}
  			if (ficapi_re_create_fail(ztd::out_ptr::inout_ptr<void*>(p), ficapi_type::ficapi_type_opaque, 1) != 0) {
  				int* rawp = static_cast<int*>(p.get());
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(deleter.store == 1);
  		}
  	}
  	SECTION("unique_ptr<int, stateful_deleter>") {
  		reused_int_deleter deleter{};
  		try {
  			std::unique_ptr<int, std::reference_wrapper<reused_int_deleter>> p(nullptr, std::ref(deleter));
  
  			ficapi_int_re_create(ztd::out_ptr::inout_ptr(p));
  			{
  				int* rawp = p.get();
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  			}
  			ficapi_int_re_create(ztd::out_ptr::inout_ptr(p));
  			{
  				int* rawp = p.get();
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  			}
  			if (ficapi_int_re_create_fail(ztd::out_ptr::inout_ptr(p), 1) != 0) {
  				int* rawp = p.get();
  				REQUIRE(rawp != nullptr);
  				REQUIRE(*rawp == ficapi_get_dynamic_data());
  				REQUIRE(std::addressof(p.get_deleter().get()) == std::addressof(deleter));
  				REQUIRE(p.get_deleter().get().store == 0);
  				throw std::runtime_error("ficapi: failure to create");
  			}
  		}
  		catch (const std::runtime_error&) {
  			REQUIRE(deleter.store == 1);
  		}
  	}
  }
  