Expect an incompatible encoding exception when a template with a magic comment renders a partial without one and its source encoding doesn't match the default external encoding

1 files changed, 13 insertions, 2 deletions

diff --git a/actionpack/test/template/render_test.rb b/actionpack/test/template/render_test.rb
index 647c673902..c9a50da418 100644
--- a/actionpack/test/template/render_test.rb
+++ b/actionpack/test/template/render_test.rb
@@ -283,7 +283,7 @@ class LazyViewRenderTest < ActiveSupport::TestCase
       with_external_encoding Encoding::ASCII_8BIT do
         result = @view.render(:file => "test/utf8_magic.html.erb", :layouts => "layouts/yield")
         assert_equal Encoding::UTF_8, result.encoding
-        assert_equal "Русский текст\nUTF-8\nUTF-8\nUTF-8\n", result
+        assert_equal "Русский текст\n\nUTF-8\nUTF-8\nUTF-8\n", result
       end
     end
 
@@ -291,7 +291,7 @@ class LazyViewRenderTest < ActiveSupport::TestCase
       with_external_encoding Encoding::UTF_8 do
         result = @view.render(:file => "test/utf8.html.erb", :layouts => "layouts/yield")
         assert_equal Encoding::UTF_8, result.encoding
-        assert_equal "Русский текст\nUTF-8\nUTF-8\nUTF-8\n", result
+        assert_equal "Русский текст\n\nUTF-8\nUTF-8\nUTF-8\n", result
       end
     end
 
@@ -306,6 +306,17 @@ class LazyViewRenderTest < ActiveSupport::TestCase
       end
     end
 
+    def test_render_utf8_template_with_partial_with_incompatible_encoding
+      with_external_encoding Encoding::SJIS do
+        begin
+          result = @view.render(:file => "test/utf8_magic_with_bare_partial.html.erb", :layouts => "layouts/yield")
+          flunk 'Should have raised incompatible encoding error'
+        rescue ActionView::Template::Error => error
+          assert_match 'invalid byte sequence in Shift_JIS', error.original_exception.message
+        end
+      end
+    end
+
     def with_external_encoding(encoding)
       old, Encoding.default_external = Encoding.default_external, encoding
       yield