text: import onesignal
  
  
  def test_initialize(client):
      assert isinstance(client, onesignal.OneSignal)
  
  
  def test_send(client):
      notification = onesignal.SegmentNotification(
          contents={'en': 'Hello World'},
          included_segments=[onesignal.SegmentNotification.ALL]
      )
      assert client.send(notification)
  
  
  def test_cancel(client):
      notification = onesignal.SegmentNotification(
          contents={'en': 'Hello World'},
          included_segments=[onesignal.SegmentNotification.ALL]
      )
  
      try:
          client.cancel(notification)
          assert False, 'Notification was not sent yet, but was on its way to be canceled'
      except ValueError:
          pass
  
      client.send(notification)
      assert client.cancel(notification)
  
  
  def test_details(client):
      notification = onesignal.SegmentNotification(
          contents={'en': 'Hello World'},
          included_segments=onesignal.SegmentNotification.ACTIVE_USERS
      )
      notification = client.send(notification)
      details = client.details(notification)
      assert details['failed'] == 0
  