Make internal info an official data channel

Because TUI also uses it to retrieve background information about the
ThreadClient, it's not for test-only anymore. So this commit makes that
clear by removing comments, renaming methods and add a key to
test-related info.

Author: st0012

lib/debug/local.rb

@@ -52,7 +52,7 @@ def ask prompt
       end
     end
 
-    def puts_internal_info(internal_info)
+    def puts_internal_test_info(internal_info)
       $stdout.puts("INTERNAL_INFO: #{internal_info}")
     end
 

lib/debug/session.rb

@@ -220,10 +220,9 @@ def request_tc(req)
     end
 
     def process_event evt
-      # variable `@internal_info` is only used for test
       @tc, output, ev, @internal_info, *ev_args = evt
 
-      capture_tui_data(@internal_info[:tui]) if @ui.tui?
+      capture_tui_data(@internal_info[:tui]) if @ui.tui? && @internal_info
 
       output.each{|str| @ui.puts str} if ev != :suspend
 
@@ -387,7 +386,7 @@ def wait_command
           @ui.puts "(rdbg:#{@preset_command.source}) #{line}"
         end
       else
-        @ui.puts_internal_info(JSON.generate(@internal_info)) if ENV['RUBY_DEBUG_TEST_MODE']
+        @ui.puts_internal_test_info(JSON.generate(@internal_info[:test])) if ENV['RUBY_DEBUG_TEST_MODE']
         line = @ui.readline prompt
       end
 
@@ -1952,7 +1951,7 @@ def event type, *args
       end
     end
 
-    def puts_internal_info(internal_info)
+    def puts_internal_test_info(internal_info)
       puts("INTERNAL_INFO: #{internal_info}")
     end
   end

lib/debug/thread_client.rb

@@ -212,11 +212,8 @@ def generate_tui_data(metadata)
     def generate_info
       return {} unless current_frame
 
-      result = { location: current_frame.location_str, line: current_frame.location.lineno }
-
-      if @tui_metadata
-        result[:tui] = generate_tui_data(@tui_metadata)
-      end
+      result = { test: { location: current_frame.location_str, line: current_frame.location.lineno } }
+      result[:tui] = generate_tui_data(@tui_metadata) if @tui_metadata
 
       result
     end