code: def test_backend_initialization(self):
      doker_backend = fiber.backend.get_backend("docker")
      assert isinstance(doker_backend, fiber.docker_backend.Backend)
      assert doker_backend.name == "docker"
  
      # kuberntes backend needs k8s config, so it's skipped here
      # k8s_backend = fiber.backend.get_backend("kubernetes", incluster=False)
      # assert isinstance(k8s_backend, fiber.kubernetes_backend.Backend)
      # assert k8s_backend.name == "kubernetes"
  
      local_backend = fiber.backend.get_backend("local")
      assert isinstance(local_backend, fiber.local_backend.Backend)
      assert local_backend.name == "local"
  
file_path: fiber/tests/test_backend.py
imports: import os
  import fiber.backend
  import fiber.config
  import fiber.docker_backend
  import fiber.kubernetes_backend
  import fiber.local_backend
label_desc: Use image node_id 2 for calling the TestBackend obj's underlying member method code with example usage: obj.test_backend_initialization() without return types