fixes to tag alias cache expiration, improved instructions for sign up

test/unit/alias_and_implication_importer_test.rb

@@ -20,7 +20,7 @@ class AliasAndImplicationImporterTest < ActiveSupport::TestCase
       end
       
       should "process it" do
-        assert_difference("Delayed::Job.count", 3) do
+        assert_difference("Delayed::Job.count", 4) do
           @importer.process!
         end
       end

test/unit/tag_alias_correction_test.rb

@@ -45,6 +45,7 @@ class TagAliasCorrectionTest < ActiveSupport::TestCase
       context "that is fixed" do
         setup do
           @correction.fix!
+          TagAlias.to_aliased(["aaa"])
         end
         
         should "now have the correct cache" do

test/unit/tag_alias_test.rb

@@ -32,11 +32,11 @@ class TagAliasTest < ActiveSupport::TestCase
       tag1 = FactoryGirl.create(:tag, :name => "aaa")
       tag2 = FactoryGirl.create(:tag, :name => "bbb")
       ta = FactoryGirl.create(:tag_alias, :antecedent_name => "aaa", :consequent_name => "bbb")
-      assert_nil(MEMCACHE.get("ta:aaa"))
-      ta.update_cache
-      assert_equal("bbb", MEMCACHE.get("ta:aaa"))
+      assert_nil(Cache.get("ta:aaa"))
+      TagAlias.to_aliased(["aaa"])
+      assert_equal("bbb", Cache.get("ta:aaa"))
       ta.destroy
-      assert_nil(MEMCACHE.get("ta:aaa"))
+      assert_nil(Cache.get("ta:aaa"))
     end
     
     should "update any affected posts when saved" do