tag unit test

db/migrate/20100205162521_create_tags.rb

@@ -0,0 +1,17 @@
+class CreateTags < ActiveRecord::Migration
+  def self.up
+    create_table :tags do |t|
+      t.column :name, :string, :null => false
+      t.column :post_count, :integer, :null => false, :default => 0
+      t.column :category, :integer, :null => false, :default => 0
+      t.column :related_tags, :text
+      t.timestamps
+    end
+    
+    add_index :tags, :name, :unique => true
+  end
+
+  def self.down
+    drop_table :tags
+  end
+end