# error:

jens@Nimmmich:~/src/RadRails/ov9tut$ rake --trace
(in /home/jens/src/RadRails/ov9tut)
** Invoke default (first_time)
** Invoke test (first_time)
** Execute test
** Invoke test:units (first_time)
** Invoke db:test:prepare (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:test:prepare
** Invoke db:test:clone (first_time)
** Invoke db:schema:dump (first_time)
** Invoke environment
** Execute db:schema:dump
** Execute db:test:clone
** Invoke db:schema:load (first_time)
** Invoke environment
** Execute db:schema:load
** Execute test:units
/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby/1.8/rake/rake_test_loader.rb" "test/unit/user_test.rb"
/home/jens/src/RadRails/ov9tut/config/../vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:147:in `require': /home/jens/src/RadRails/ov9tut/config/../app/models/user.rb:45: parse error, unexpected $, expecting kEND (SyntaxError)
        from /home/jens/src/RadRails/ov9tut/config/../vendor/rails/activerecord/lib/../../activesupport/lib/active_support/dependencies.rb:147:in `require'
        from /home/jens/src/RadRails/ov9tut/config/../vendor/rails/activerecord/lib/active_record/fixtures.rb:463:in `require_fixture_classes'
        from /home/jens/src/RadRails/ov9tut/config/../vendor/rails/activerecord/lib/active_record/fixtures.rb:459:in `require_fixture_classes'
        from /home/jens/src/RadRails/ov9tut/config/../vendor/rails/activerecord/lib/active_record/fixtures.rb:454:in `fixtures'
!!        from ./test/unit/user_test.rb:4
        from /usr/lib/ruby/1.8/rake/rake_test_loader.rb:5
        from /usr/lib/ruby/1.8/rake/rake_test_loader.rb:5
** Invoke test:functionals (first_time)
** Invoke db:test:prepare
** Execute test:functionals
/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby/1.8/rake/rake_test_loader.rb"
** Invoke test:integration (first_time)
** Invoke db:test:prepare
** Execute test:integration
/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby/1.8/rake/rake_test_loader.rb"
rake aborted!
Test failures
/home/jens/src/RadRails/ov9tut/config/../vendor/rails/railties/lib/tasks/testing.rake:35
/usr/lib/ruby/1.8/rake.rb:232:in `execute'
/usr/lib/ruby/1.8/rake.rb:232:in `execute'
/usr/lib/ruby/1.8/rake.rb:202:in `invoke'
/usr/lib/ruby/1.8/thread.rb:135:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:195:in `invoke'
/usr/lib/ruby/1.8/rake.rb:209:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:844:in `each'
/usr/lib/ruby/1.8/rake.rb:208:in `invoke_prerequisites'
/usr/lib/ruby/1.8/rake.rb:201:in `invoke'
/usr/lib/ruby/1.8/thread.rb:135:in `synchronize'
/usr/lib/ruby/1.8/rake.rb:195:in `invoke'
/usr/lib/ruby/1.8/rake.rb:1719:in `run'
/usr/lib/ruby/1.8/rake.rb:1719:in `run'
/usr/bin/rake:4


# app/model/user.rb:

class User < ActiveRecord::Base
  # zusätzliches Attribut, nicht in der SQL-Datenbank
  # attr: extern lesbar, attr_reader/writer: extern les/schreibbar,
  # attr_accessor: beides
  attr_accessor :password

  validates_presence_of :login
  validates_uniqueness_of :login
  validates_length_of :login, :within => 1..20
  validates_presence_of :password, :password_confirmation, :if => :password_required?
  validates_length_of :password, :length => 3..40, :if => :password_required?
  validates_confirmation_of :password, :if => :password_required?

  before_save :encrypt_password

  def self.authenticate(login, password)
    user = find(:first, :select => 'id, salt', :conditions => ['login = ?', :login])
    return nil if user.nil?
    find(:first, :conditions => ['id = ? AND encrypted_password = ?', id, user.encrypt(p
  end

  # global erreichbare Funktion
  def encrypt(password)
    self.class.encrypt(password, salt)
  end

  def self.encrypt(password, salt)
    Digest::SHA1.hexdigest("--#{salt}--#{password}--")
  end

  # before filter
  def encrypt_password
   return if password.nil? # guard
   self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--")
      if new_record? self.crypted_password = encrypt(password)
  end


protected

  def password_required?
    crypted_password.nil? or not password.blank?
  end

end




# tests/unit/user_test.rb:

require File.dirname(__FILE__)   '/../test_helper'

class UserTest < Test::Unit::TestCase
!!  fixtures :users

  def test_should_require_login
    user = create_user(:login => nil)
    assert user.errors.on(:login),
      "no errors creating user with nil login"
  end

  def test_should_ignore_blank_password
    users(:quentin).password = ''
    assert users(:quentin).valid?
    users(:quentin).password = 'foo'
    assert !users(:quentin).valid?
  end


  def test_should_require_unique_login
    user = create_user(:login => 'quentin')
    assert user.errors.on(:login),
      "no errors creating another quentin user"
  end

  def test_should_require_password
    user = create_user(:password => nil)
    assert user.errors.on(:password)
  end

  def test_should_require_password_confirmation
    user = create_user(:password_confirmation => nil)
    assert user.errors.on(:password_confirmation)
  end

  def test_should_reset_password
    users(:quentin).update_attributes(
            :password => 'new password',
            :password_confirmation => 'new password')
    assert_equal users(:quentin),
          User.authenticate('quentin', 'new password')
  end

  def test_should_not_rehash_password
    users(:quentin).update_attribute(:login, 'quentin2')
    assert_equal users(:quentin),
      User.authenticate('quentin2', 'quentin')
  end

  def test_should_authenticate_user
    assert_equal users(:quentin),
      User.authenticate('quentin', 'quentin')
  end


  protected

  # Hilfsklasse zum Erzeugen eines Users.
  # override überschreibt (ggf.) einige Werte des übergebenen Hashes
  # mittels der "merge" Funktion.
  def create_user(override = {})
    User.create({:login => 'obie',
          :password => 'qwerty',
          :password_confirmation => 'qwerty'}.merge(override))
  end

end