test/ruby/test_autoload: hoist out ruby_impl_require

Having "require" implemented in Ruby is the common case nowadays
with RubyGems, so ensure it is easy-to-reuse the same logic for
future tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Fri Nov  6 06:59:37 2015  Eric Wong  <e@80x24.org>
+
+	* test/ruby/test_autoload: hoist out ruby_impl_require
+
 Thu Nov  5 13:03:58 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* defs/id.def (token_ops): gather associations between IDs,

test/ruby/test_autoload.rb

@@ -187,31 +187,34 @@ p Foo::Bar
     }
   end
 
-  def test_require_implemented_in_ruby_is_called
+  def ruby_impl_require
     Kernel.module_eval do; alias :old_require :require; end
-
     called_with = []
     Kernel.send :define_method, :require do |path|
       called_with << path
       old_require path
     end
-
-    Tempfile.create(['autoload', '.rb']) {|file|
-      file.puts 'class AutoloadTest; end'
-      file.close
-      add_autoload(file.path)
-      begin
-        assert(Object::AutoloadTest)
-      ensure
-        remove_autoload_constant
-      end
-      assert_equal [file.path], called_with
-    }
-
+    yield called_with
   ensure
     Kernel.module_eval do; alias :require :old_require; undef :old_require; end
   end
 
+  def test_require_implemented_in_ruby_is_called
+    ruby_impl_require do |called_with|
+      Tempfile.create(['autoload', '.rb']) {|file|
+        file.puts 'class AutoloadTest; end'
+        file.close
+        add_autoload(file.path)
+        begin
+          assert(Object::AutoloadTest)
+        ensure
+          remove_autoload_constant
+        end
+        assert_equal [file.path], called_with
+      }
+    end
+  end
+
   def add_autoload(path)
     (@autoload_paths ||= []) << path
     ::Object.class_eval {autoload(:AutoloadTest, path)}