zammad/spec/models/channel/driver/sendmail_spec.rb

# Copyright (C) 2012-2025 Zammad Foundation, https://zammad-foundation.org/

require 'rails_helper'

RSpec.describe Channel::Driver::Sendmail do
  context 'with env var ZAMMAD_MAIL_TO_FILE present' do

    let(:address) { Faker::Internet.email }
    let(:body)    { Faker::Lorem.sentence(word_count: 3) }
    let(:file)    { Rails.root.join("tmp/mails/#{address}.eml") }

    around do |example|
      ENV['ZAMMAD_MAIL_TO_FILE'] = '1'
      FileUtils.rm_f(file)
      example.run
      FileUtils.rm_f(file)
      ENV.delete('ZAMMAD_MAIL_TO_FILE')
    end

    it 'creates mail file', :aggregate_failures do
      described_class.new.deliver({}, { to: address, from: address, body: body })
      expect(file).to exist
      content = File.read(file)
      expect(content).to match(%r{#{body}})
      expect(content).to match(%r{#{address}})
    end
  end

  context 'with regular Sendmail usage' do
    let(:address) { Faker::Internet.email }
    let(:body)    { Faker::Lorem.sentence(word_count: 3) }

    let(:mocked_sendmail) do
      instance_double(IO).tap do |dbl|
        allow(dbl).to receive(:puts)
        allow(dbl).to receive(:flush)
      end
    end

    around do |example|
      ENV['ZAMMAD_MAIL_PRETEND_NOT_TEST'] = '1'
      example.run
      ENV.delete('ZAMMAD_MAIL_PRETEND_NOT_TEST')
    end

    it 'sends mail', :aggregate_failures do
      allow_any_instance_of(Mail::Sendmail).to receive(:popen).and_yield(mocked_sendmail)

      described_class.new.deliver({}, { to: address, from: address, body: body })

      expect(mocked_sendmail).to have_received(:puts).with(include(address).and(include(body)))
      expect(mocked_sendmail).to have_received(:flush)
    end
  end
end