require 'active_support/test_case'

class ActiveSupport::TestCase
  def assert_not(assertion)
    assert !assertion
  end

  def assert_blank(assertion)
    assert assertion.blank?
  end

  def assert_not_blank(assertion)
    assert !assertion.blank?
  end
  alias :assert_present :assert_not_blank

  def assert_email_sent(address = nil, &block)
    assert_difference('ActionMailer::Base.deliveries.size') { yield }
    if address.present?
      assert_equal address, ActionMailer::Base.deliveries.last['to'].to_s
    end
  end

  def assert_email_not_sent(&block)
    assert_no_difference('ActionMailer::Base.deliveries.size') { yield }
  end
end