Remove extra file helper

Author: st0012

test/debug/break_test.rb

@@ -205,8 +205,6 @@ def test_debugger_doesnt_stop_when_other_instance_calls_the_inherited_method
     end
 
     class PathOptionTest < TestCase
-      include ExtraFileHelper
-
       def extra_file
         <<~RUBY
         Foo.new.bar
@@ -310,8 +308,6 @@ def test_break_C_method_with_singleton_method
     end
 
     class PathOptionTest < TestCase
-      include ExtraFileHelper
-
       def extra_file
         <<~RUBY
         1.abs
@@ -618,8 +614,6 @@ def test_conditional_breakpoint_shows_error
     end
 
     class PathOptionTest < TestCase
-      include ExtraFileHelper
-
       def extra_file
         <<~RUBY
         a = 100

test/debug/catch_test.rb

@@ -150,8 +150,6 @@ def test_catch_with_namespace_stops_at_exception
   end
 
   class PathOptionTest < TestCase
-    include ExtraFileHelper
-
     def extra_file
       <<~RUBY
         def bar

test/support/extra_file_helper.rb

@@ -2,10 +2,10 @@
 
 require 'test/unit'
 require 'tempfile'
+require 'securerandom'
 
 require_relative 'utils'
 require_relative 'assertions'
-require_relative 'extra_file_helper'
 
 module DEBUGGER__
   class TestCase < Test::Unit::TestCase
@@ -24,5 +24,15 @@ def remove_temp_file
       File.unlink(@temp_file) if @temp_file
       @temp_file = nil
     end
+
+    def with_extra_tempfile
+      t = Tempfile.create([SecureRandom.hex(5), '.rb']).tap do |f|
+        f.write(extra_file)
+        f.close
+      end
+      yield t
+    ensure
+      File.unlink t if t
+    end
   end
 end