code: def test_pip_ray_is_overwritten(self, start_cluster, field):
      cluster, address = start_cluster
  
      # It should be OK to install packages with ray dependency.
      ray.init(
          address, runtime_env={"pip": ["pip-install-test==0.5", "ray"]}
      )
  
      @ray.remote
      def f():
          import pip_install_test  # noqa: F401
  
          return True
  
      # Ensure that the runtime env has been installed.
      assert ray.get(f.remote())
  
      ray.shutdown()
  
      # It should be OK if cluster ray meets the installing ray version.
      ray.init(
          address,
          runtime_env={"pip": ["pip-install-test==0.5", "ray>=1.12.0"]},
      )
  
      @ray.remote
      def f():
          import pip_install_test  # noqa: F401
  
          return True
  
      # Ensure that the runtime env has been installed.
      assert ray.get(f.remote())
  
      ray.shutdown()
  
      # It will raise exceptions if ray is overwritten.
      with pytest.raises(Exception):
          ray.init(
              address,
              runtime_env={
                  "pip": ["pip-install-test==0.5", "ray<=1.6.0"]
              },
          )
  
          @ray.remote
          def f():
              import pip_install_test  # noqa: F401
  
              return True
  
          # Ensure that the runtime env has been installed.
          assert ray.get(f.remote())
  
      ray.shutdown()
  
file_path: ray/python/ray/tests/test_runtime_env_conda_and_pip_4.py
imports: import os
  import pytest
  import sys
  from ray._private.runtime_env.pip import PipProcessor
  import ray
label_desc: Use image node_id 1 for calling the TestGC obj's underlying member method code with example usage: obj.test_pip_ray_is_overwritten(start_cluster, field) and returns: True, True, True