ActionMailer::TestCase

Test Example

UserMailerTest Example

  class UserMailerTest < ActionMailer::TestCase
    tests UserMailer

    def test_welcome_mail
      user = users(:quentin)

      MyMailer.deliver_welcome_email
      assert !ActionMailer::Base.deliveries.empty?

      sent = ActionMailer::Base.deliveries.first
      assert_equal [@user.email], sent.to
      assert_equal “expected subject”, sent.subject
      assert sent.body =~ /^Welcome to my App/
      assert sent.body =~ /^Username: #{@user.login}$/
      assert sent.body =~ /^Password: [a-z0-9]{10}$/i
    end
  end

This example is a modified version of the one in this blog post:

http://sablog.com/archives/2006/03/14/how-to-test-actionmailer-in-ruby-on-rails