added additional artist test

test/unit/artist_test.rb

@@ -14,6 +14,21 @@ class ArtistTest < ActiveSupport::TestCase
       CurrentUser.ip_addr = nil
     end
     
+    context "with a matching tag alias" do
+      setup do
+        @tag_alias = Factory.create(:tag_alias, :antecedent_name => "aaa", :consequent_name => "bbb")
+        @artist = Factory.create(:artist, :name => "aaa")
+      end
+      
+      should "know it has an alias" do
+        assert_equal(true, @artist.has_tag_alias?)
+      end
+      
+      should "know its alias" do
+        assert_equal("bbb", @artist.tag_alias_name)
+      end
+    end
+    
     context "that has been banned" do
       setup do
         @post = Factory.create(:post, :tag_string => "aaa")