annotate test/unit/mailer_test.rb @ 1519:afce8026aaeb redmine-2.4-integration

Merge from branch "live"

# Redmine - project management software
# Copyright (C) 2006-2014  Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require File.expand_path('../../test_helper', __FILE__)

class MailerTest < ActiveSupport::TestCase
  include Redmine::I18n
  include ActionDispatch::Assertions::SelectorAssertions
  fixtures :projects, :enabled_modules, :issues, :users, :members,
           :member_roles, :roles, :documents, :attachments, :news,
           :tokens, :journals, :journal_details, :changesets,
           :trackers, :projects_trackers,
           :issue_statuses, :enumerations, :messages, :boards, :repositories,
           :wikis, :wiki_pages, :wiki_contents, :wiki_content_versions,
           :versions,
           :comments

  def setup
    ActionMailer::Base.deliveries.clear
    Setting.host_name = 'mydomain.foo'
    Setting.protocol = 'http'
    Setting.plain_text_mail = '0'
  end

  def test_generated_links_in_emails
    Setting.default_language = 'en'
    Setting.host_name = 'mydomain.foo'
    Setting.protocol = 'https'

    journal = Journal.find(3)
    assert Mailer.deliver_issue_edit(journal)

    mail = last_email
    assert_not_nil mail

    assert_select_email do
      # link to the main ticket
      assert_select 'a[href=?]',
                    'https://mydomain.foo/issues/2#change-3',
                    :text => 'Feature request #2: Add ingredients categories'
      # link to a referenced ticket
      assert_select 'a[href=?][title=?]',
                    'https://mydomain.foo/issues/1',
                    'Can&#x27;t print recipes (New)',
                    :text => '#1'
      # link to a changeset
      assert_select 'a[href=?][title=?]',
                    'https://mydomain.foo/projects/ecookbook/repository/revisions/2',
                    'This commit fixes #1, #2 and references #1 &amp; #3',
                    :text => 'r2'
      # link to a description diff
      assert_select 'a[href=?][title=?]',
                    'https://mydomain.foo/journals/diff/3?detail_id=4',
                    'View differences',
                    :text => 'diff'
      # link to an attachment
      assert_select 'a[href=?]',
                    'https://mydomain.foo/attachments/download/4/source.rb',
                    :text => 'source.rb'
    end
  end

  def test_generated_links_with_prefix
    Setting.default_language = 'en'
    relative_url_root = Redmine::Utils.relative_url_root
    Setting.host_name = 'mydomain.foo/rdm'
    Setting.protocol = 'http'

    journal = Journal.find(3)
    assert Mailer.deliver_issue_edit(journal)

    mail = last_email
    assert_not_nil mail

    assert_select_email do
      # link to the main ticket
      assert_select 'a[href=?]',
                    'http://mydomain.foo/rdm/issues/2#change-3',
                    :text => 'Feature request #2: Add ingredients categories'
      # link to a referenced ticket
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/issues/1',
                    'Can&#x27;t print recipes (New)',
                    :text => '#1'
      # link to a changeset
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/projects/ecookbook/repository/revisions/2',
                    'This commit fixes #1, #2 and references #1 &amp; #3',
                    :text => 'r2'
      # link to a description diff
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/journals/diff/3?detail_id=4',
                    'View differences',
                    :text => 'diff'
      # link to an attachment
      assert_select 'a[href=?]',
                    'http://mydomain.foo/rdm/attachments/download/4/source.rb',
                    :text => 'source.rb'
    end
  end

  def test_issue_edit_should_generate_url_with_hostname_for_relations
    journal = Journal.new(:journalized => Issue.find(1), :user => User.find(1), :created_on => Time.now)
    journal.details << JournalDetail.new(:property => 'relation', :prop_key => 'label_relates_to', :value => 2)
    Mailer.deliver_issue_edit(journal)
    assert_not_nil last_email
    assert_select_email do
      assert_select 'a[href=?]', 'http://mydomain.foo/issues/2', :text => 'Feature request #2'
    end
  end

  def test_generated_links_with_prefix_and_no_relative_url_root
    Setting.default_language = 'en'
    relative_url_root = Redmine::Utils.relative_url_root
    Setting.host_name = 'mydomain.foo/rdm'
    Setting.protocol = 'http'
    Redmine::Utils.relative_url_root = nil

    journal = Journal.find(3)
    assert Mailer.deliver_issue_edit(journal)

    mail = last_email
    assert_not_nil mail

    assert_select_email do
      # link to the main ticket
      assert_select 'a[href=?]',
                    'http://mydomain.foo/rdm/issues/2#change-3',
                    :text => 'Feature request #2: Add ingredients categories'
      # link to a referenced ticket
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/issues/1',
                    'Can&#x27;t print recipes (New)',
                    :text => '#1'
      # link to a changeset
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/projects/ecookbook/repository/revisions/2',
                    'This commit fixes #1, #2 and references #1 &amp; #3',
                    :text => 'r2'
      # link to a description diff
      assert_select 'a[href=?][title=?]',
                    'http://mydomain.foo/rdm/journals/diff/3?detail_id=4',
                    'View differences',
                    :text => 'diff'
      # link to an attachment
      assert_select 'a[href=?]',
                    'http://mydomain.foo/rdm/attachments/download/4/source.rb',
                    :text => 'source.rb'
    end
  ensure
    # restore it
    Redmine::Utils.relative_url_root = relative_url_root
  end

  def test_email_headers
    issue = Issue.find(1)
    Mailer.deliver_issue_add(issue)
    mail = last_email
    assert_not_nil mail
    assert_equal 'OOF', mail.header['X-Auto-Response-Suppress'].to_s
    assert_equal 'auto-generated', mail.header['Auto-Submitted'].to_s
    assert_equal '<redmine.example.net>', mail.header['List-Id'].to_s
  end

  def test_email_headers_should_include_sender
    issue = Issue.find(1)
    Mailer.deliver_issue_add(issue)
    mail = last_email
    assert_equal issue.author.login, mail.header['X-Redmine-Sender'].to_s
  end

  def test_plain_text_mail
    Setting.plain_text_mail = 1
    journal = Journal.find(2)
    Mailer.deliver_issue_edit(journal)
    mail = last_email
    assert_equal "text/plain; charset=UTF-8", mail.content_type
    assert_equal 0, mail.parts.size
    assert !mail.encoded.include?('href')
  end

  def test_html_mail
    Setting.plain_text_mail = 0
    journal = Journal.find(2)
    Mailer.deliver_issue_edit(journal)
    mail = last_email
    assert_equal 2, mail.parts.size
    assert mail.encoded.include?('href')
  end

  def test_from_header
    with_settings :mail_from => '[e-mail]' do
      Mailer.test_email(User.find(1)).deliver
    end
    mail = last_email
    assert_equal '[e-mail]', mail.from_addrs.first
  end

  def test_from_header_with_phrase
    with_settings :mail_from => 'Redmine app <[e-mail]>' do
      Mailer.test_email(User.find(1)).deliver
    end
    mail = last_email
    assert_equal '[e-mail]', mail.from_addrs.first
    assert_equal 'Redmine app <[e-mail]>', mail.header['From'].to_s
  end

  def test_should_not_send_email_without_recipient
    news = News.first
    user = news.author
    # Remove members except news author
    news.project.memberships.each {|m| m.destroy unless m.user == user}

    user.pref.no_self_notified = false
    user.pref.save
    User.current = user
    Mailer.news_added(news.reload).deliver
    assert_equal 1, last_email.bcc.size

    # nobody to notify
    user.pref.no_self_notified = true
    user.pref.save
    User.current = user
    ActionMailer::Base.deliveries.clear
    Mailer.news_added(news.reload).deliver
    assert ActionMailer::Base.deliveries.empty?
  end

  def test_issue_add_message_id
    issue = Issue.find(2)
    Mailer.deliver_issue_add(issue)
    mail = last_email
    assert_match /^redmine\.issue-2\.20060719190421\.[a-f0-9]+@example\.net/, mail.message_id
    assert_include "[e-mail]", mail.references
  end

  def test_issue_edit_message_id
    journal = Journal.find(3)
    journal.issue = Issue.find(2)

    Mailer.deliver_issue_edit(journal)
    mail = last_email
    assert_match /^redmine\.journal-3\.\d+\.[a-f0-9]+@example\.net/, mail.message_id
    assert_include "[e-mail]", mail.references
    assert_select_email do
      # link to the update
      assert_select "a[href=?]",
                    "http://mydomain.foo/issues/#{journal.journalized_id}#change-#{journal.id}"
    end
  end

  def test_message_posted_message_id
    message = Message.find(1)
    Mailer.message_posted(message).deliver
    mail = last_email
    assert_match /^redmine\.message-1\.\d+\.[a-f0-9]+@example\.net/, mail.message_id
    assert_include "[e-mail]", mail.references
    assert_select_email do
      # link to the message
      assert_select "a[href=?]",
                    "http://mydomain.foo/boards/#{message.board.id}/topics/#{message.id}",
                    :text => message.subject
    end
  end

  def test_reply_posted_message_id
    message = Message.find(3)
    Mailer.message_posted(message).deliver
    mail = last_email
    assert_match /^redmine\.message-3\.\d+\.[a-f0-9]+@example\.net/, mail.message_id
    assert_include "[e-mail]", mail.references
    assert_select_email do
      # link to the reply
      assert_select "a[href=?]",
                    "http://mydomain.foo/boards/#{message.board.id}/topics/#{message.root.id}?r=#{message.id}#message-#{message.id}",
                    :text => message.subject
    end
  end

  test "#issue_add should notify project members" do
    issue = Issue.find(1)
    assert Mailer.deliver_issue_add(issue)
    assert last_email.bcc.include?('[e-mail]')
  end

  test "#issue_add should not notify project members that are not allow to view the issue" do
    issue = Issue.find(1)
    Role.find(2).remove_permission!(:view_issues)
    assert Mailer.deliver_issue_add(issue)
    assert !last_email.bcc.include?('[e-mail]')
  end

  test "#issue_add should notify issue watchers" do
    issue = Issue.find(1)
    user = User.find(9)
    # minimal email notification options
    user.pref.no_self_notified = '1'
    user.pref.save
    user.mail_notification = false
    user.save

    Watcher.create!(:watchable => issue, :user => user)
    assert Mailer.deliver_issue_add(issue)
    assert last_email.bcc.include?(user.mail)
  end

  test "#issue_add should not notify watchers not allowed to view the issue" do
    issue = Issue.find(1)
    user = User.find(9)
    Watcher.create!(:watchable => issue, :user => user)
    Role.non_member.remove_permission!(:view_issues)
    assert Mailer.deliver_issue_add(issue)
    assert !last_email.bcc.include?(user.mail)
  end

  def test_issue_add_should_include_enabled_fields
    Setting.default_language = 'en'
    issue = Issue.find(2)
    assert Mailer.deliver_issue_add(issue)
    assert_mail_body_match '* Target version: 1.0', last_email
    assert_select_email do
      assert_select 'li', :text => 'Target version: 1.0'
    end
  end

  def test_issue_add_should_not_include_disabled_fields
    Setting.default_language = 'en'
    issue = Issue.find(2)
    tracker = issue.tracker
    tracker.core_fields -= ['fixed_version_id']
    tracker.save!
    assert Mailer.deliver_issue_add(issue)
    assert_mail_body_no_match 'Target version', last_email
    assert_select_email do
      assert_select 'li', :text => /Target version/, :count => 0
    end
  end

  # test mailer methods for each language
  def test_issue_add
    issue = Issue.find(1)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.deliver_issue_add(issue)
    end
  end

  def test_issue_edit
    journal = Journal.find(1)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.deliver_issue_edit(journal)
    end
  end

  def test_issue_edit_should_send_private_notes_to_users_with_permission_only
    journal = Journal.find(1)
    journal.private_notes = true
    journal.save!

    Role.find(2).add_permission! :view_private_notes
    Mailer.deliver_issue_edit(journal)
    assert_equal %w([e-mail] [e-mail]), ActionMailer::Base.deliveries.last.bcc.sort

    Role.find(2).remove_permission! :view_private_notes
    Mailer.deliver_issue_edit(journal)
    assert_equal %w([e-mail]), ActionMailer::Base.deliveries.last.bcc.sort
  end

  def test_issue_edit_should_send_private_notes_to_watchers_with_permission_only
    Issue.find(1).set_watcher(User.find_by_login('someone'))
    journal = Journal.find(1)
    journal.private_notes = true
    journal.save!

    Role.non_member.add_permission! :view_private_notes
    Mailer.deliver_issue_edit(journal)
    assert_include '[e-mail]', ActionMailer::Base.deliveries.last.bcc.sort

    Role.non_member.remove_permission! :view_private_notes
    Mailer.deliver_issue_edit(journal)
    assert_not_include '[e-mail]', ActionMailer::Base.deliveries.last.bcc.sort
  end

  def test_issue_edit_should_mark_private_notes
    journal = Journal.find(2)
    journal.private_notes = true
    journal.save!

    with_settings :default_language => 'en' do
      Mailer.deliver_issue_edit(journal)
    end
    assert_mail_body_match '(Private notes)', last_email
  end

  def test_issue_edit_with_relation_should_notify_users_who_can_see_the_related_issue
    issue = Issue.generate!
    private_issue = Issue.generate!(:is_private => true)
    IssueRelation.create!(:issue_from => issue, :issue_to => private_issue, :relation_type => 'relates')
    issue.reload
    assert_equal 1, issue.journals.size
    journal = issue.journals.first
    ActionMailer::Base.deliveries.clear

    Mailer.deliver_issue_edit(journal)
    last_email.bcc.each do |email|
      user = User.find_by_mail(email)
      assert private_issue.visible?(user), "Issue was not visible to #{user}"
    end
  end

  def test_document_added
    document = Document.find(1)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.document_added(document).deliver
    end
  end

  def test_attachments_added
    attachements = [ Attachment.find_by_container_type('Document') ]
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.attachments_added(attachements).deliver
    end
  end

  def test_version_file_added
    attachements = [ Attachment.find_by_container_type('Version') ]
    assert Mailer.attachments_added(attachements).deliver
    assert_not_nil last_email.bcc
    assert last_email.bcc.any?
    assert_select_email do
      assert_select "a[href=?]", "http://mydomain.foo/projects/ecookbook/files"
    end
  end

  def test_project_file_added
    attachements = [ Attachment.find_by_container_type('Project') ]
    assert Mailer.attachments_added(attachements).deliver
    assert_not_nil last_email.bcc
    assert last_email.bcc.any?
    assert_select_email do
      assert_select "a[href=?]", "http://mydomain.foo/projects/ecookbook/files"
    end
  end

  def test_news_added
    news = News.first
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.news_added(news).deliver
    end
  end

  def test_news_comment_added
    comment = Comment.find(2)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.news_comment_added(comment).deliver
    end
  end

  def test_message_posted
    message = Message.first
    recipients = ([message.root] + message.root.children).collect {|m| m.author.mail if m.author}
    recipients = recipients.compact.uniq
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert Mailer.message_posted(message).deliver
    end
  end

  def test_wiki_content_added
    content = WikiContent.find(1)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert_difference 'ActionMailer::Base.deliveries.size' do
        assert Mailer.wiki_content_added(content).deliver
        assert_select_email do
          assert_select 'a[href=?]',
            'http://mydomain.foo/projects/ecookbook/wiki/CookBook_documentation',
            :text => 'CookBook documentation'
        end
      end
    end
  end

  def test_wiki_content_updated
    content = WikiContent.find(1)
    valid_languages.each do |lang|
      Setting.default_language = lang.to_s
      assert_difference 'ActionMailer::Base.deliveries.size' do
        assert Mailer.wiki_content_updated(content).deliver
        assert_select_email do
          assert_select 'a[href=?]',
            'http://mydomain.foo/projects/ecookbook/wiki/CookBook_documentation',
            :text => 'CookBook documentation'
        end
      end
    end
  end

  def test_account_information
    user = User.find(2)
    valid_languages.each do |lang|
      user.update_attribute :language, lang.to_s
      user.reload
      assert Mailer.account_information(user, 'pAsswORd').deliver
    end
  end

  def test_lost_password
    token = Token.find(2)
    valid_languages.each do |lang|
      token.user.update_attribute :language, lang.to_s
      token.reload
      assert Mailer.lost_password(token).deliver
    end
  end

  def test_register
    token = Token.find(1)
    Setting.host_name = 'redmine.foo'
    Setting.protocol = 'https'

    valid_languages.each do |lang|
      token.user.update_attribute :language, lang.to_s
      token.reload
      ActionMailer::Base.deliveries.clear
      assert Mailer.register(token).deliver
      mail = last_email
      assert_select_email do
        assert_select "a[href=?]",
                      "https://redmine.foo/account/activate?token=#{token.value}",
                      :text => "https://redmine.foo/account/activate?token=#{token.value}"
      end
    end
  end

  def test_test
    user = User.find(1)
    valid_languages.each do |lang|
      user.update_attribute :language, lang.to_s
      assert Mailer.test_email(user).deliver
    end
  end

  def test_reminders
    Mailer.reminders(:days => 42)
    assert_equal 1, ActionMailer::Base.deliveries.size
    mail = last_email
    assert mail.bcc.include?('[e-mail]')
    assert_mail_body_match 'Bug #3: Error 281 when updating a recipe', mail
    assert_equal '1 issue(s) due in the next 42 days', mail.subject
  end

  def test_reminders_should_not_include_closed_issues
    with_settings :default_language => 'en' do
      Issue.create!(:project_id => 1, :tracker_id => 1, :status_id => 5,
                      :subject => 'Closed issue', :assigned_to_id => 3,
                      :due_date => 5.days.from_now,
                      :author_id => 2)
      ActionMailer::Base.deliveries.clear

      Mailer.reminders(:days => 42)
      assert_equal 1, ActionMailer::Base.deliveries.size
      mail = last_email
      assert mail.bcc.include?('[e-mail]')
      assert_mail_body_no_match 'Closed issue', mail
    end
  end

  def test_reminders_for_users
    Mailer.reminders(:days => 42, :users => ['5'])
    assert_equal 0, ActionMailer::Base.deliveries.size # No mail for dlopper
    Mailer.reminders(:days => 42, :users => ['3'])
    assert_equal 1, ActionMailer::Base.deliveries.size # No mail for dlopper
    mail = last_email
    assert mail.bcc.include?('[e-mail]')
    assert_mail_body_match 'Bug #3: Error 281 when updating a recipe', mail
  end

  def test_reminder_should_include_issues_assigned_to_groups
    with_settings :default_language => 'en' do
      group = Group.generate!
      group.users << User.find(2)
      group.users << User.find(3)

      Issue.create!(:project_id => 1, :tracker_id => 1, :status_id => 1,
                      :subject => 'Assigned to group', :assigned_to => group,
                      :due_date => 5.days.from_now,
                      :author_id => 2)
      ActionMailer::Base.deliveries.clear

      Mailer.reminders(:days => 7)
      assert_equal 2, ActionMailer::Base.deliveries.size
      assert_equal %w([e-mail] [e-mail]), ActionMailer::Base.deliveries.map(&:bcc).flatten.sort
      ActionMailer::Base.deliveries.each do |mail|
        assert_mail_body_match 'Assigned to group', mail
      end
    end
  end

  def test_mailer_should_not_change_locale
    Setting.default_language = 'en'
    # Set current language to italian
    set_language_if_valid 'it'
    # Send an email to a french user
    user = User.find(1)
    user.language = 'fr'
    Mailer.account_activated(user).deliver
    mail = last_email
    assert_mail_body_match 'Votre compte', mail

    assert_equal :it, current_language
  end

  def test_with_deliveries_off
    Mailer.with_deliveries false do
      Mailer.test_email(User.find(1)).deliver
    end
    assert ActionMailer::Base.deliveries.empty?
    # should restore perform_deliveries
    assert ActionMailer::Base.perform_deliveries
  end

  def test_layout_should_include_the_emails_header
    with_settings :emails_header => "*Header content*" do
      with_settings :plain_text_mail => 0 do
        assert Mailer.test_email(User.find(1)).deliver
        assert_select_email do
          assert_select ".header" do
            assert_select "strong", :text => "Header content"
          end
        end
      end
      with_settings :plain_text_mail => 1 do
        assert Mailer.test_email(User.find(1)).deliver
        mail = last_email
        assert_not_nil mail
        assert_include "*Header content*", mail.body.decoded
      end
    end
  end

  def test_layout_should_not_include_empty_emails_header
    with_settings :emails_header => "", :plain_text_mail => 0 do
      assert Mailer.test_email(User.find(1)).deliver
      assert_select_email do
        assert_select ".header", false
      end
    end
  end

  def test_layout_should_include_the_emails_footer
    with_settings :emails_footer => "*Footer content*" do
      with_settings :plain_text_mail => 0 do
        assert Mailer.test_email(User.find(1)).deliver
        assert_select_email do
          assert_select ".footer" do
            assert_select "strong", :text => "Footer content"
          end
        end
      end
      with_settings :plain_text_mail => 1 do
        assert Mailer.test_email(User.find(1)).deliver
        mail = last_email
        assert_not_nil mail
        assert_include "\n-- \n", mail.body.decoded
        assert_include "*Footer content*", mail.body.decoded
      end
    end
  end

  def test_layout_should_not_include_empty_emails_footer
    with_settings :emails_footer => "" do
      with_settings :plain_text_mail => 0 do
        assert Mailer.test_email(User.find(1)).deliver
        assert_select_email do
          assert_select ".footer", false
        end
      end
      with_settings :plain_text_mail => 1 do
        assert Mailer.test_email(User.find(1)).deliver
        mail = last_email
        assert_not_nil mail
        assert_not_include "\n-- \n", mail.body.decoded
      end
    end
  end

  def test_should_escape_html_templates_only
    Issue.generate!(:project_id => 1, :tracker_id => 1, :subject => 'Subject with a <tag>')
    mail = last_email
    assert_equal 2, mail.parts.size
    assert_include '<tag>', text_part.body.encoded
    assert_include '&lt;tag&gt;', html_part.body.encoded
  end

  def test_should_raise_delivery_errors_when_raise_delivery_errors_is_true
    mail = Mailer.test_email(User.find(1))
    mail.delivery_method.stubs(:deliver!).raises(Exception.new("delivery error"))

    ActionMailer::Base.raise_delivery_errors = true
    assert_raise Exception, "delivery error" do
      mail.deliver
    end
  ensure
    ActionMailer::Base.raise_delivery_errors = false
  end

  def test_should_log_delivery_errors_when_raise_delivery_errors_is_false
    mail = Mailer.test_email(User.find(1))
    mail.delivery_method.stubs(:deliver!).raises(Exception.new("delivery error"))

    Rails.logger.expects(:error).with("Email delivery error: delivery error")
    ActionMailer::Base.raise_delivery_errors = false
    assert_nothing_raised do
      mail.deliver
    end
  end

  def test_mail_should_return_a_mail_message
    assert_kind_of ::Mail::Message, Mailer.test_email(User.find(1))
  end

  private

  def last_email
    mail = ActionMailer::Base.deliveries.last
    assert_not_nil mail
    mail
  end

  def text_part
    last_email.parts.detect {|part| part.content_type.include?('text/plain')}
  end

  def html_part
    last_email.parts.detect {|part| part.content_type.include?('text/html')}
  end
end