new_contents: # Copyright (C) 2016 Allen Li
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from unittest import mock
  
  import pytest
  
  import mir.msmtpq.queue as queuelib
  
  
  @pytest.fixture
  def queue():
      """Fake Queue."""
      return dict()
  
  
  @pytest.fixture
  def sendmail():
      """Stub/spy Sendmail."""
      return mock.create_autospec(queuelib.Sendmail)
  
  
  def test_sender_repr():
      sender = queuelib.QueueSender(
          queue=mock.sentinel.queue,
          sendmail=mock.sentinel.sendmail,
      )
      got = repr(sender)
      assert got == ("QueueSender(queue=sentinel.queue,"
                     " sendmail=sentinel.sendmail)")
  
  
  def test_sender_send(queue, sendmail):
      sender = queuelib.QueueSender(queue=queue, sendmail=sendmail)
      message = queuelib.Message(
          args=['foo'],
          message='Sophie is cute.',
      )
      queue['sophie'] = message
      sender.send('sophie')
      assert len(sendmail.call_args_list) == 1
      assert sendmail.call_args == mock.call(message)
      assert 'sophie' not in queue
  
  
  def test_sender_send_error(queue, sendmail):
      sendmail.side_effect = queuelib.SendmailError
      sender = queuelib.QueueSender(queue=queue, sendmail=sendmail)
      message = queuelib.Message(
          args=['foo'],
          message='Sophie is cute.',
      )
      queue['sophie'] = message
      sender.send('sophie')
      assert 'sophie' in queue
  
  
  def test_sender_send_all(queue, sendmail):
      sender = queuelib.QueueSender(queue=queue, sendmail=sendmail)
      queue['sophie'] = mock.sentinel.sophie
      queue['prachta'] = mock.sentinel.prachta
      with mock.patch.object(type(sender), 'send') as send:
          sender.send_all()
      assert mock.call('sophie') in send.call_args_list
      assert mock.call('prachta') in send.call_args_list
  
subject: Add QueueSender tests