Should native validations be tested in rails?

Question

Everybody knows that automated testing is a good thing.

Not everybody knows exacly what to test.

My question is if native validations like validate_presence_of,

Answer 1

Test the code you write. ActiveRecord has great test coverage including coverage for the validation class methods.

Spec:

require 'spec_helper'

describe User do
  before(:each) do
    @user = User.new
  end

  it "should not be valid without an email" do
    @user.save.should be_false
    @user.should_not be_valid
    @user.email = "example@example.com"
    @user.should be_valid
    @user.save.should be_true
  end

end

To get that spec to pass you would need

class User < ActiveRecord::Base
  validates_presence_of :email
end