code: def test_list(self):
      self.project_controller.init("test4", "test description")
  
      paths_1 = self.__setup()
  
      filepath2 = os.path.join(
          self.file_collection_controller.home, "filepath2"
      )
      with open(filepath2, "wb") as f:
          f.write(to_bytes("test" + "\n"))
      paths_2 = [filepath2]
  
      file_collection_obj_1 = self.file_collection_controller.create(
          paths_1
      )
      file_collection_obj_2 = self.file_collection_controller.create(
          paths_2
      )
  
      # List all code and ensure they exist
      result = self.file_collection_controller.list()
  
      assert (
          len(result) == 2
          and file_collection_obj_1 in result
          and file_collection_obj_2 in result
      )
  
imports: import os
  import shutil
  import tempfile
  import platform
  from io import open
  from datmo.config import Config
  from datmo.core.controller.project import ProjectController
  from datmo.core.controller.file.file_collection import FileCollectionController
  from datmo.core.util.exceptions import EntityNotFound, UnstagedChanges
label_desc: Use image node_id 6 for calling the TestFileCollectionController obj's underlying member method code with example usage: obj.test_list() without return types