From 637ca24aeda5481c2ee12382d0118976fa674217 Mon Sep 17 00:00:00 2001
From: Holger Just <hjust@meine-er.de>
Date: Mon, 16 Jan 2012 15:33:42 +0100
Subject: [PATCH] Completely disable the Rails cache for tests

Settings extension to handle cache behaviour by Gregor Schmidt.
---
 app/models/setting.rb | 25 ++++++++++++++++++++++++-
 test/test_helper.rb   |  1 +
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/app/models/setting.rb b/app/models/setting.rb
index 101595ad..581766de 100644
--- a/app/models/setting.rb
+++ b/app/models/setting.rb
@@ -97,7 +97,11 @@ class Setting < ActiveRecord::Base
 
   # Returns the value of the setting named name
   def self.[](name)
-    Marshal.load(Rails.cache.fetch(self.cache_key(name)) {Marshal.dump(find_or_default(name).value)})
+    if use_caching?
+      Marshal.load(Rails.cache.fetch(self.cache_key(name)) {Marshal.dump(find_or_default(name).value)})
+    else
+      find_or_default(name).value
+    end
   end
 
   def self.[]=(name, v)
@@ -156,6 +160,25 @@ class Setting < ActiveRecord::Base
       "only, you may use Setting.first.try(:touch)"
   end
 
+  # Temporarily deactivate settings caching in the block scope
+  def self.uncached
+    cache_setting = self.use_caching
+    self.use_caching = false
+    yield
+  ensure
+    self.use_caching = cache_setting
+  end
+
+  # Check if Setting caching should be performed
+  def self.use_caching?
+    !Thread.current['chiliproject/settings/do_not_use_caching']
+  end
+
+  # Dis-/En-able Setting caching. This is mainly intended to be used in tests
+  def self.use_caching=(new_value)
+    Thread.current['chiliproject/settings/do_not_use_caching'] = !new_value
+  end
+
 private
   # Returns the Setting instance for the setting named name
   # (record found in database or new record with default value)
diff --git a/test/test_helper.rb b/test/test_helper.rb
index afbc02e2..435cc5ab 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -47,6 +47,7 @@ class ActiveSupport::TestCase
   # Add more helper methods to be used by all tests here...
   def setup
     super
+    Setting.use_caching = false
     Rails.cache.clear
   end