automate mains test more

move sources and include exit code and stdout in filename

test/mains/helper.rb

@@ -6,8 +6,15 @@ module Mains
     def setup;end
 
     def run_main_file(file)
-      input = File.read("test/mains/#{file}.rb")
+      file_name = Dir["test/mains/source/#{file}*.rb"].first
+      assert file_name , "no file #{file_name}"
+      input = File.read(file_name)
+      basename = file_name.split("/").last.split(".").first
+      _ , stdout , exit_code = basename.split("_")
+      stdout = "" unless stdout
       run_main(input)
+      assert_equal stdout , @interpreter.stdout , "Wrong stdout for #{file}"
+      assert_equal exit_code , get_return.to_s , "Wrong exit code for #{file}"
     end
   end
 end