A sample migration spec

add_email_at_utc_hour_to_users_spec.rb

# spec/migrations/add_email_at_utc_hour_to_users_spec.rb
require 'spec_helper'

require Dir[Rails.root.join('db/migrate/*_add_email_at_utc_hour_to_users.rb')].first

describe AddEmailAtUtcHourToUsers do
  let(:migration) { AddEmailAtUtcHourToUsers.new }

  describe '#up' do
    before { migration.up; User.reset_column_information }

    it 'adds the email_at_utc_hour column' do
      User.columns_hash.should have_key('email_at_utc_hour')
    end
  end
end