def test_packager_build_package(self, PackagerContext):
context = PackagerContext.return_value
packager = Packager(context, {})
packager.client = MagicMock()
packager.client.images.return_value = [{'Id': 0}]
result_container, result_logs = packager.build_package()
container = packager.client.create_container.return_value
packager.client.create_container.assert_called_with(0)
packager.client.logs.assert_called_with(container, stream=True)
packager.client.start.assert_called_with(container)
self.assertEqual(result_container, container)
