[feat] add ament index cpp

Author: pariaspe

package.xml

@@ -24,10 +24,10 @@
   <depend>eigen</depend>
   <exec_depend>rclpy</exec_depend>
 
-  <!-- linting test dependencies -->
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>ament_lint_common</test_depend>
   <test_depend>ament_cmake_gtest</test_depend>
+  <test_depend>ament_index_cpp</test_depend>
 
   <export>
     <build_type>ament_cmake</build_type>

tests/CMakeLists.txt

@@ -16,12 +16,13 @@ file(GLOB GTEST_SOURCE "*_gtest.cpp")
 
 if(GTEST_SOURCE)
   find_package(ament_cmake_gtest REQUIRED)
+  find_package(ament_index_cpp REQUIRED)
 
   foreach(TEST_SOURCE ${GTEST_SOURCE})
     get_filename_component(TEST_NAME ${TEST_SOURCE} NAME_WE)
 
     ament_add_gtest(${PROJECT_NAME}_${TEST_NAME} ${TEST_SOURCE})
     ament_target_dependencies(${PROJECT_NAME}_${TEST_NAME} ${PROJECT_DEPENDENCIES})
-    target_link_libraries(${PROJECT_NAME}_${TEST_NAME} gtest_main ${PROJECT_NAME})
+    target_link_libraries(${PROJECT_NAME}_${TEST_NAME} ament_index_cpp::ament_index_cpp gtest_main ${PROJECT_NAME})
   endforeach()
 endif()