From 77e79ecd92acd43a282566e5d297b8e74dc14f05 Mon Sep 17 00:00:00 2001
From: Daniel Schierbeck <dasch@zendesk.com>
Date: Mon, 15 Jul 2013 15:59:18 +0200
Subject: Bust the template digest cache key when details are changed

Since the lookup details will influence which template is resolved, they
need to be included in the cache key -- otherwise two different
templates may erroneously share the same digest value.
---
 actionview/test/template/digestor_test.rb | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'actionview/test')

diff --git a/actionview/test/template/digestor_test.rb b/actionview/test/template/digestor_test.rb
index c6608e214a..0f6b14a57d 100644
--- a/actionview/test/template/digestor_test.rb
+++ b/actionview/test/template/digestor_test.rb
@@ -15,6 +15,16 @@ end
 class FixtureFinder
   FIXTURES_DIR = "#{File.dirname(__FILE__)}/../fixtures/digestor"
 
+  attr_reader :details
+
+  def initialize
+    @details = {}
+  end
+
+  def details_key
+    details.hash
+  end
+
   def find(logical_name, keys, partial, options)
     FixtureTemplate.new("digestor/#{partial ? logical_name.gsub(%r|/([^/]+)$|, '/_\1') : logical_name}.#{options[:formats].first}.erb")
   end
@@ -140,6 +150,20 @@ class TemplateDigestorTest < ActionView::TestCase
     end
   end
 
+  def test_details_are_included_in_cache_key
+    # Cache the template digest.
+    old_digest = digest("events/_event")
+
+    # Change the template; the cached digest remains unchanged.
+    change_template("events/_event")
+
+    # The details are changed, so a new cache key is generated.
+    finder.details[:foo] = "bar"
+
+    # The cache is busted.
+    assert_not_equal old_digest, digest("events/_event")
+  end
+
   def test_extra_whitespace_in_render_partial
     assert_digest_difference("messages/edit") do
       change_template("messages/_form")
@@ -220,7 +244,11 @@ class TemplateDigestorTest < ActionView::TestCase
     end
 
     def digest(template_name, options={})
-      ActionView::Digestor.digest(template_name, :html, FixtureFinder.new, options)
+      ActionView::Digestor.digest(template_name, :html, finder, options)
+    end
+
+    def finder
+      @finder ||= FixtureFinder.new
     end
 
     def change_template(template_name)
-- 
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