updated tag unit tests

app/models/pool.rb

@@ -0,0 +1,26 @@
+class Pool < ActiveRecord::Base
+  validates_uniqueness_of :name
+  validates_presence_of :name
+  validates_format_of :name, :with => /\A[^\s;,]+\Z/, :on => :create, :message => "cannot have whitespace, commas, or semicolons"
+  belongs_to :creator, :class_name => "Person"
+  
+  def self.create_anonymous(creator)
+    pool = Pool.create(:name => "TEMP - #{Time.now.to_f}.#{rand(1_000_000)}", :creator => creator)
+    pool.update_attribute(:name => "anonymous:#{pool.id}")
+    pool
+  end
+  
+  def neighbor_posts(post)
+    post_ids =~ /\A#{post.id} (\d+)|(\d+) #{post.id} (\d+)|(\d+) #{post.id}\Z/
+    
+    if $2 && $3
+      {:previous => $2.to_i, :next = $3.to_i}
+    elsif $1
+      {:previous => $1.to_i}
+    elsif $4
+      {:next => $4.to_i}
+    else
+      nil
+    end
+  end
+end