discourse/spec/mailers/group_smtp_mailer_spec.rb

# frozen_string_literal: true
require 'rails_helper'
require 'email/receiver'

describe GroupSmtpMailer do
  let(:group) {
    Fabricate(:group,
      name: 'Testers',
      title: 'Tester',
      full_name: 'Testers Group',
      smtp_server: 'smtp.gmail.com',
      smtp_port: 587,
      smtp_ssl: true,
      imap_server: 'imap.gmail.com',
      imap_port: 993,
      imap_ssl: true,
      email_username: 'bugs@gmail.com',
      email_password: 'super$secret$password'
    )
  }

  let(:user) {
    user = Fabricate(:user)
    group.add_owner(user)
    user
  }

  let(:email) {
    <<~EOF
    Delivered-To: bugs@gmail.com
    MIME-Version: 1.0
    From: John Doe <john@doe.com>
    Date: Tue, 01 Jan 2019 12:00:00 +0200
    Message-ID: <a52f67a3d3560f2a35276cda8519b10b595623bcb66912bb92df6651ad5f75be@mail.gmail.com>
    Subject: Hello from John
    To: "bugs@gmail.com" <bugs@gmail.com>
    Content-Type: text/plain; charset="UTF-8"

    Hello,

    How are you doing?
    EOF
  }

  let(:receiver) {
    receiver = Email::Receiver.new(email,
      destinations: [group],
      uid_validity: 1,
      uid: 10000
    )
    receiver.process!
    receiver
  }

  let(:raw) { 'hello, how are you doing?' }

  before do
    SiteSetting.enable_smtp = true
    Jobs.run_immediately!
  end

  it 'sends an email as reply' do
    post = PostCreator.create(user,
      topic_id: receiver.incoming_email.topic.id,
      raw: raw
    )

    expect(ActionMailer::Base.deliveries.size).to eq(1)

    sent_mail = ActionMailer::Base.deliveries[0]
    expect(sent_mail.to).to contain_exactly('john@doe.com')
    expect(sent_mail.subject).to eq('Re: Hello from John')
    expect(sent_mail.to_s).to include(raw)
  end

end