code: def test_resources_numerical_error():
      resource = _Resources(
          cpu=0.99, gpu=0.99, custom_resources={"a": 0.99}
      )
      small_resource = _Resources(
          cpu=0.33, gpu=0.33, custom_resources={"a": 0.33}
      )
      for i in range(3):
          resource = _Resources.subtract(resource, small_resource)
      assert resource.is_nonnegative()
  
file_path: ray/python/ray/tune/tests/test_resource_updater.py
imports: import ray
  from ray.tests.conftest import *
  from ray.tune.utils.resource_updater import _ResourceUpdater, _Resources
  from unittest import mock
label_desc: Use image node_id 1 for calling a global function with example usage: test_resources_numerical_error() without return types