.. _program_listing_file__tmp_ws_src_rosidl_rosidl_typesupport_introspection_tests_include_rosidl_typesupport_introspection_tests_gtest_message_introspection_test.hpp:

Program Listing for File message_introspection_test.hpp
=======================================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_rosidl_rosidl_typesupport_introspection_tests_include_rosidl_typesupport_introspection_tests_gtest_message_introspection_test.hpp>` (``/tmp/ws/src/rosidl/rosidl_typesupport_introspection_tests/include/rosidl_typesupport_introspection_tests/gtest/message_introspection_test.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2022 Open Source Robotics Foundation, Inc.
   //
   // 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.
   
   #ifndef ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__GTEST__MESSAGE_INTROSPECTION_TEST_HPP_
   #define ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__GTEST__MESSAGE_INTROSPECTION_TEST_HPP_
   
   #include <memory>
   
   #include "rosidl_typesupport_introspection_tests/gtest/shared_library_test.hpp"
   #include "rosidl_typesupport_introspection_tests/api.hpp"
   #include "rosidl_typesupport_introspection_tests/type_traits.hpp"
   #include "rosidl_typesupport_introspection_tests/types.hpp"
   
   namespace rosidl_typesupport_introspection_tests
   {
   namespace testing
   {
   
   
   template<typename MessageT>
   class MessageIntrospectionTest : public SharedLibraryTest
   {
   public:
     using TypeSupportLibraryT =
       typename introspection_traits<MessageT>::TypeSupportLibraryT;
     using MessageDescriptorT =
       typename TypeSupportLibraryT::MessageDescriptorT;
   
     MessageIntrospectionTest()
     : SharedLibraryTest(TypeSupportLibraryT::name)
     {
     }
   
     void SetUp() override
     {
       const char * typesupport_symbol =
         introspection_traits<MessageT>::typesupport.symbol;
       auto message_typesupport_fetch =
         reinterpret_cast<MessageTypeSupportFetchFunctionT>(
         this->GetSharedLibrary().get_symbol(typesupport_symbol));
       ASSERT_NE(message_typesupport_fetch, nullptr);
       const rosidl_message_type_support_t * message_typesupport =
         get_message_typesupport_handle(
         message_typesupport_fetch(),
         TypeSupportLibraryT::identifier);
       ASSERT_NE(message_typesupport, nullptr);
       message_descriptor_ =
         reinterpret_cast<const MessageDescriptorT *>(
         message_typesupport->data);
       ASSERT_NE(message_descriptor_, nullptr);
     }
   
     const MessageDescriptorT * GetMessageDescriptor() const
     {
       return message_descriptor_;
     }
   
     std::unique_ptr<void, std::function<void(void *)>>
     MakeTypeErasedMessage() const
     {
       std::allocator<MessageT> allocator;
       std::function<void(void *)> type_erased_message_deleter = [ = ](void * ptr) mutable {
           finalize_message(ptr, message_descriptor_);
           allocator.deallocate(reinterpret_cast<MessageT *>(ptr), 1);
         };
       std::unique_ptr<void, std::function<void(void *)>> type_erased_message(
         initialize_message(allocator.allocate(1), message_descriptor_),
         type_erased_message_deleter);
       return type_erased_message;
     }
   
   private:
     const MessageDescriptorT * message_descriptor_{nullptr};
   };
   
   }  // namespace testing
   }  // namespace rosidl_typesupport_introspection_tests
   
   #endif  // ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__GTEST__MESSAGE_INTROSPECTION_TEST_HPP_