password_strength_validator_spec.rb

require 'spec_helper'

class SomeRecord
  attr_accessor :password
  attr_reader :errors

  def initialize(attrs = {})
    @password = attrs.delete(:password)
    @errors = ActiveModel::Errors.new(self)
  end

  def read_attribute_for_validation(attr)
    send(attr)
  end

end

describe PasswordStrengthValidator do

  subject { PasswordStrengthValidator.new(:attributes => [:password]) }

  it "does not allow spaces" do
    record = SomeRecord.new(:password => "a bcdefghi")
    subject.validate(record)
    record.errors[:password].should include("must not contain spaces")
  end

  it "requires at least one letter and one number" do
    record = SomeRecord.new(:password => "abcdefghi")
    subject.validate(record)
    record.errors[:password].should include("must contain at least one letter and number")
  end

  it "recognizes valid password" do
    record = SomeRecord.new(:password => "abcdefgh12")
    subject.validate(record)
    record.errors[:password].should be_blank
  end

  it "does not raise on nil password" do
    record = SomeRecord.new(:password => nil)
    lambda { subject.validate(record) }.should_not raise_error
  end

  it "does not invalidate on nil password" do
    record = SomeRecord.new(:password => nil)
    subject.validate(record)
    record.errors[:password].should be_blank
  end

end