text: import pytest
  import responses
  
  import thumbtack_client
  import thumbtack_client.MountedDiskImage
  
  
  @pytest.fixture
  def client():
      return thumbtack_client.ThumbtackClient()
  
  
  def test_smoke():
      assert thumbtack_client.MountedDiskImage.MountedDiskImage is not None
  
  
  @responses.activate
  def test_list_mounts_empty(client):
      responses.add(responses.GET, 'http://127.0.0.1:8208/mounts/', '[]')
  
      response = client.list_mounted_images()
      assert response == []
  
  
  @responses.activate
  def test_list_mounts_populated(client):
      responses.add(responses.GET, 'http://127.0.0.1:8208/mounts/', '[1, 2, 3]')
  
      response = client.list_mounted_images()
      assert len(response) > 0
  