code: def test(self):
      RuntimeEnvPluginSchemaManager.clear()
      # No schemas when starts.
      assert len(RuntimeEnvPluginSchemaManager.schemas) == 0
      # When the `validate` is used first time, the schemas will be loaded lazily.
      # The validation of pip is enabled.
      with pytest.raises(
          jsonschema.exceptions.ValidationError, match="pip_check"
      ):
          RuntimeEnvPluginSchemaManager.validate(
              "pip", {"packages": ["requests"], "pip_check": "123"}
          )
      # The validation of test_env_1 is disabled because we haven't set the env var.
      RuntimeEnvPluginSchemaManager.validate(
          "test_env_1", {"array": ["123"], "bool": "123"}
      )
      assert len(RuntimeEnvPluginSchemaManager.schemas) != 0
      # Set the thirdparty schemas.
      os.environ["RAY_RUNTIME_ENV_PLUGIN_SCHEMAS"] = schemas_dir
      # clear the loaded schemas to make sure the schemas chould be reloaded next
      # time.
      RuntimeEnvPluginSchemaManager.clear()
      assert len(RuntimeEnvPluginSchemaManager.schemas) == 0
      # The validation of test_env_1 is enabled.
      with pytest.raises(
          jsonschema.exceptions.ValidationError, match="bool"
      ):
          RuntimeEnvPluginSchemaManager.validate(
              "test_env_1", {"array": ["123"], "bool": "123"}
          )
  
imports: import os
  import pytest
  import sys
  import tempfile
  from pathlib import Path
  from ray import job_config
  import yaml
  import jsonschema
  from ray._private.runtime_env.validation import parse_and_validate_excludes, parse_and_validate_working_dir, parse_and_validate_conda, parse_and_validate_pip, parse_and_validate_env_vars, parse_and_validate_py_modules
  from ray._private.runtime_env.plugin_schema_manager import RuntimeEnvPluginSchemaManager
  from ray.runtime_env import RuntimeEnv
label_desc: Use image node_id 1 for calling the TestRuntimeEnvPluginSchemaManager obj's underlying member method code with example usage: obj.test() without return types