Write loops. They make your specs faster to write and more covered.

app_spec.rb

require 'spec_helper'

describe App do

  describe "when using the factory" do
    subject { create :app }

    it { should be_valid }

  end

  describe "when initializing" do
    subject { App }

    it { should respond_to :new }

  end

  describe "when describing attributes" do
    columns = %w(id site domain subdomain)
    indexes = %w()

    columns.each do |column|
      it { should have_db_column column.to_sym }
    end

    indexes.each do |index|
      it { should have_db_index index.to_sym }
    end

  end

  describe "when relating" do
    has_manys = %w(users resource_types)

    has_manys.each do |association|
      it { should have_many association.to_sym }
    end

  end

  describe "when validating" do
    presences = %w(site domain)
    uniques = %w(domain)
    accessibles = %w(site domain subdomain)
    before { create :app }

    presences.each do |presence|
      it { should validate_presence_of presence.to_sym }
    end

    uniques.each do |unique|
      it { should validate_uniqueness_of unique.to_sym }
    end

    accessibles.each do |accessible|
      it { should allow_mass_assignment_of accessible.to_sym }
    end

    it { should_not allow_value("chris hein.dev").for :domain }
    it { should_not allow_value("w w w").for :subdomain }

  end

  describe "when calling #to_param" do
    subject { create :app }

    it "should return the domain for default finder" do
      subject.to_param.should eq subject.domain
    end

  end

end