gistfile1.rb

Spec::Matchers.define :require do |attribute|
  match do |object|
    factory = object.class.name.downcase.to_sym
    object = Factory.build(factory, attribute => "")
    !object.valid?
  end
end

describe User do
  it "should be valid given valid attributes" do
    user = Factory.build(:user)
    user.should be_valid
  end
  
  it {should require(:email)}
  it {should require(:password)}
  it {should require(:password_confirmation)}
end