require 'test/test_helper'
require 'digest/sha1'

class AuthenticableTest < ActiveSupport::TestCase

  def encrypt_password(user, pepper=nil, stretches=1)
    user.class_eval { define_method(:stretches) { stretches } } if stretches
    user.password = '123456'
    ::Digest::SHA1.hexdigest("--#{user.password_salt}--#{pepper}--123456--#{pepper}--")
  end

  test 'should respond to password and password confirmation' do
    user = new_user
    assert user.respond_to?(:password)
    assert user.respond_to?(:password_confirmation)
  end

  test 'should generate salt while setting password' do
    assert_present new_user.password_salt
    assert_present new_user(:password => nil).password_salt
    assert_present new_user(:password => '').password_salt
    assert_present create_user.password_salt
  end

  test 'should not change password salt when updating' do
    user = create_user
    salt = user.password_salt
    user.expects(:password_salt=).never
    user.save!
    assert_equal salt, user.password_salt
  end

  test 'should generate a base64 hash using SecureRandom for password salt' do
    ActiveSupport::SecureRandom.expects(:base64).with(15).returns('friendly_token')
    assert_equal 'friendly_token', new_user.password_salt
  end

  test 'should never generate the same salt for different users' do
    password_salts = []
    10.times do
      salt = create_user.password_salt
      assert_not password_salts.include?(salt)
      password_salts << salt
    end
  end

  test 'should generate encrypted password while setting password' do
    assert_present new_user.encrypted_password
    assert_present new_user(:password => nil).encrypted_password
    assert_present new_user(:password => '').encrypted_password
    assert_present create_user.encrypted_password
  end

  test 'should encrypt password again if password has changed' do
    user = create_user
    encrypted_password = user.encrypted_password
    user.password = user.password_confirmation = 'new_password'
    user.save!
    assert_not_equal encrypted_password, user.encrypted_password
  end

  test 'should encrypt password using a sha1 hash' do
    user = new_user
    assert_equal encrypt_password(user), user.encrypted_password
  end

  test 'should fallback to devise pepper default configuring' do
    begin
      Devise.pepper = ''
      user = new_user
      assert_equal encrypt_password(user), user.encrypted_password
      Devise.pepper = 'new_pepper'
      user = new_user
      assert_equal encrypt_password(user, 'new_pepper'), user.encrypted_password
      Devise.pepper = '123456'
      user = new_user
      assert_equal encrypt_password(user, '123456'), user.encrypted_password
    ensure
      Devise.pepper = nil
    end
  end

  test 'should fallback to devise stretches default configuring' do
    begin
      default_stretches = Devise.stretches
      Devise.stretches = 1
      user = new_user
      assert_equal encrypt_password(user, nil, nil), user.encrypted_password
    ensure
      Devise.stretches = default_stretches
    end
  end

  test 'should test for a valid password' do
    user = create_user
    assert user.valid_password?('123456')
    assert_not user.valid_password?('654321')
  end

  test 'should authenticate a valid user with email and password and return it' do
    user = create_user
    User.any_instance.stubs(:confirmed?).returns(true)
    authenticated_user = User.authenticate(:email => user.email, :password => user.password)
    assert_equal authenticated_user, user
  end

  test 'should return nil when authenticating an invalid user by email' do
    user = create_user
    authenticated_user = User.authenticate(:email => 'another.email@email.com', :password => user.password)
    assert_nil authenticated_user
  end

  test 'should return nil when authenticating an invalid user by password' do
    user = create_user
    authenticated_user = User.authenticate(:email => user.email, :password => 'another_password')
    assert_nil authenticated_user
  end
end