Stop using global vars where not needed

Simplify local process site setting provider
Stop setting up methods over and over
Centralize cache clearing

spec/components/site_setting_extension_spec.rb

@@ -6,13 +6,73 @@ describe SiteSettingExtension do
 
   class FakeSettings
     extend SiteSettingExtension
-    provider = SiteSettings::LocalProcessProvider
+    self.provider = SiteSettings::LocalProcessProvider.new
+  end
+
+  class FakeSettings2
+    extend SiteSettingExtension
+    self.provider = FakeSettings.provider
   end
 
   let :settings do
     FakeSettings
   end
 
+  let :settings2 do
+    FakeSettings2
+  end
+
+  describe "refresh!" do
+
+    it "will reset to default if provider vanishes" do
+      settings.setting(:hello, 1)
+      settings.hello = 100
+      settings.hello.should == 100
+
+      settings.provider.clear
+      settings.refresh!
+
+      settings.hello.should == 1
+    end
+
+    it "will set to new value if provider changes" do
+
+      settings.setting(:hello, 1)
+      settings.hello = 100
+      settings.hello.should == 100
+
+      settings.provider.save(:hello, 99, SiteSetting.types[:fixnum] )
+      settings.refresh!
+
+      settings.hello.should == 99
+    end
+
+    it "Publishes changes cross sites" do
+      settings.setting(:hello, 1)
+      settings2.setting(:hello, 1)
+
+      settings.hello = 100
+
+      settings2.refresh!
+      settings2.hello.should == 100
+
+      settings.hello = 99
+
+      settings2.refresh!
+      settings2.hello.should == 99
+    end
+
+  end
+
+  describe "multisite" do
+    it "has no db cross talk" do
+      settings.setting(:hello, 1)
+      settings.hello = 100
+      settings.provider.current_site = "boom"
+      settings.hello.should == 1
+    end
+  end
+
   describe "int setting" do
     before do
       settings.setting(:test_setting, 77)