Only process idl interfaces

Signed-off-by: Miguel Company <miguelcompany@eprosima.com>

test_communication/CMakeLists.txt

@@ -41,17 +41,21 @@ if(BUILD_TESTING)
   foreach(interface_file ${interface_files})
     get_filename_component(interface_ns "${interface_file}" DIRECTORY)
     get_filename_component(interface_ns "${interface_ns}" NAME)
+    # Only process IDL interfaces
     string_ends_with("${interface_file}" ".idl" is_idl)
-    if(is_idl AND interface_ns STREQUAL "msg")
+    if(NOT is_idl)
+      continue()
+    endif()
+    # Decide category based on interface_ns
+    if(interface_ns STREQUAL "msg")
       list(APPEND message_files "${interface_file}")
       continue()
     endif()
-    string_ends_with("${interface_file}" ".srv" is_service)
-    if(is_service AND interface_ns STREQUAL "srv")
+    if(interface_ns STREQUAL "srv")
       list(APPEND service_files "${interface_file}")
       continue()
     endif()
-    if(is_idl AND interface_ns STREQUAL "action")
+    if(interface_ns STREQUAL "action")
       list(APPEND action_files "${interface_file}")
       continue()
     endif()