old_contents: import unittest
  from unittest import mock
  
  import urwid
  
  from subiquitycore.testing import view_helpers
  
  from subiquity.controllers.filesystem import FilesystemController
  from subiquity.models.filesystem import (
      Bootloader,
      Disk,
      FilesystemModel,
      )
  from subiquity.models.tests.test_filesystem import (
      FakeStorageInfo,
      )
  from subiquity.ui.views.filesystem.filesystem import FilesystemView
  
  
  class FilesystemViewTests(unittest.TestCase):
  
      def make_view(self, model, devices=[]):
          controller = mock.create_autospec(spec=FilesystemController)
          controller.ui = mock.Mock()
          model.bootloader = Bootloader.NONE
          model.all_devices.return_value = devices
          model.grub_install_device = None
          return FilesystemView(model, controller)
  
      def test_simple(self):
          self.make_view(mock.create_autospec(spec=FilesystemModel))
  
      def test_one_disk(self):
          model = mock.create_autospec(spec=FilesystemModel)
          model._orig_config = []
          disk = Disk(
              m=model, serial="DISK-SERIAL", path='/dev/thing',
              info=FakeStorageInfo(size=100*(2**20), free=50*(2**20)))
          view = self.make_view(model, [disk])
          w = view_helpers.find_with_pred(
              view,
              lambda w: isinstance(w, urwid.Text) and "DISK-SERIAL" in w.text)
          self.assertIsNotNone(w, "could not find DISK-SERIAL in view")
  
new_contents: import unittest
  from unittest import mock
  
  import urwid
  
  from subiquitycore.testing import view_helpers
  
  from subiquity.controllers.filesystem import FilesystemController
  from subiquity.models.filesystem import (
      Bootloader,
      Disk,
      FilesystemModel,
      )
  from subiquity.models.tests.test_filesystem import (
      FakeStorageInfo,
      )
  from subiquity.ui.views.filesystem.filesystem import FilesystemView
  
  
  class FilesystemViewTests(unittest.TestCase):
  
      def make_view(self, model, devices=[]):
          controller = mock.create_autospec(spec=FilesystemController)
          controller.ui = mock.Mock()
          model.bootloader = Bootloader.NONE
          model.all_devices.return_value = devices
          model.grub_install_device = None
          return FilesystemView(model, controller)
  
      def test_simple(self):
          self.make_view(mock.create_autospec(spec=FilesystemModel))
  
      def test_one_disk(self):
          model = mock.create_autospec(spec=FilesystemModel)
          model._orig_config = []
          model._actions = []
          disk = Disk(
              m=model, serial="DISK-SERIAL", path='/dev/thing',
              info=FakeStorageInfo(size=100*(2**20), free=50*(2**20)))
          view = self.make_view(model, [disk])
          w = view_helpers.find_with_pred(
              view,
              lambda w: isinstance(w, urwid.Text) and "DISK-SERIAL" in w.text)
          self.assertIsNotNone(w, "could not find DISK-SERIAL in view")
  
subject: fix tests