gistfile1.txt

#model
class Comment < ActiveRecord::Base
  belongs_to :podcast
  validates_presence_of :content
  validates_presence_of :author_name
  validates_presence_of :podcast_id
  validates_length_of :author_name, :within => 2..40
  validates_length_of :author_url, :within => 5..200, :allow_blank => true
  validates_format_of :author_url, :with => /^[^\"\'\\]*$/,
    :message => "can't include backslash or bracket"
end

#spec
require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

describe Comment do

  it { should validate_presence_of(:content) }
  it { should validate_presence_of(:author_name) }
  it { should validate_presence_of(:podcast_id) }
  it { should ensure_length_of(:author_name).is_at_least(2).is_at_most(40) }
  it { should ensure_length_of(:author_url).is_at_least(5).is_at_most(200) }
  it { should belong_to :podcast }
  it { should allow_value(nil).for(:author_url) }

  it "should not allow back slash in author url" do
    should_not allow_value("http://example.com\\").for(:author_url)
  end

  it "should allow usual url" do
    should allow_value("http://example.com").for(:author_url)
  end

  it "should not allow brackets in author url" do
    should_not allow_value("http://example.com\"").for(:author_url)
  end
end