context "password requires change after certain time" do
      before :each do
        @password = "about_time"
        @salt = "not_a_rhyme"

        @user = mock_model(User)

        archived_passwords = mock

        most_recent_archived_pw = mock_model(ArchivedPassword,
          :password   => PasswordHelper::hash(@password, @salt),
          :salt       => @salt,
          :created_at => Time.now - 90.days)

        @policy = Factory.build(:password_policy_basic)
        @policy.user = @user
        @policy.change_time = 90

        @user.should_receive(:archived_passwords).and_return(archived_passwords)

        archived_passwords.should_receive(:previous).with(1).
          and_return([most_recent_archived_pw])
      end

      it 'should prevent passwords that match the expired password' do
        @policy.allows_password(@password).should be_false
      end

    end