1 files changed, 31 insertions, 2 deletions
diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb
index 3f569230c2..c814d4ea54 100644
--- a/actionpack/test/controller/render_test.rb
+++ b/actionpack/test/controller/render_test.rb
@@ -63,12 +63,16 @@ class TestController < ActionController::Base
   end
 
   def dynamic_render
-    render params[:id] # => String, AC:Params
+    render params[:id] # => String, AC::Params
+  end
+
+  def dynamic_render_permit
+    render params[:id].permit(:file)
   end
 
   def dynamic_render_with_file
     # This is extremely bad, but should be possible to do.
-    file = params[:id] # => String, AC:Params
+    file = params[:id] # => String, AC::Params
     render file: file
   end
 
@@ -253,6 +257,11 @@ end
 class ExpiresInRenderTest < ActionController::TestCase
   tests TestController
 
+  def setup
+    super
+    ActionController::Base.view_paths.paths.each(&:clear_cache)
+  end
+
   def test_dynamic_render_with_file
     # This is extremely bad, but should be possible to do.
     assert File.exist?(File.join(File.dirname(__FILE__), '../../test/abstract_unit.rb'))
@@ -261,6 +270,18 @@ class ExpiresInRenderTest < ActionController::TestCase
       response.body
   end
 
+  def test_dynamic_render_with_absolute_path
+    file = Tempfile.new('name')
+    file.write "secrets!"
+    file.flush
+    assert_raises ActionView::MissingTemplate do
+      get :dynamic_render, params: { id: file.path }
+    end
+  ensure
+    file.close
+    file.unlink
+  end
+
   def test_dynamic_render
     assert File.exist?(File.join(File.dirname(__FILE__), '../../test/abstract_unit.rb'))
     assert_raises ActionView::MissingTemplate do
@@ -268,6 +289,14 @@ class ExpiresInRenderTest < ActionController::TestCase
     end
   end
 
+  def test_permitted_dynamic_render_file_hash
+    skip "FIXME: this test passes on 4-2-stable but not master. Why?"
+    assert File.exist?(File.join(File.dirname(__FILE__), '../../test/abstract_unit.rb'))
+    response = get :dynamic_render_permit, params: { id: { file: '../\\../test/abstract_unit.rb' } }
+    assert_equal File.read(File.join(File.dirname(__FILE__), '../../test/abstract_unit.rb')),
+      response.body
+  end
+
   def test_dynamic_render_file_hash
     assert_raises ArgumentError do
       get :dynamic_render, params: { id: { file: '../\\../test/abstract_unit.rb' } }