code: def test_deployment_config_validation(self):
      # Test config ignoring unknown keys (required for forward-compatibility)
      DeploymentConfig(new_version_key=-1)
  
      # Test num_replicas validation.
      DeploymentConfig(num_replicas=1)
      with pytest.raises(ValidationError, match="type_error"):
          DeploymentConfig(num_replicas="hello")
      with pytest.raises(ValidationError, match="value_error"):
          DeploymentConfig(num_replicas=-1)
  
      # Test dynamic default for max_concurrent_queries.
      assert DeploymentConfig().max_concurrent_queries == 100
  
imports: import pytest
  from ray import cloudpickle
  from ray._private.pydantic_compat import ValidationError
  from ray._private.utils import import_attr
  from ray.serve._private.config import DeploymentConfig, ReplicaConfig, _proto_to_dict
  from ray.serve._private.constants import DEFAULT_AUTOSCALING_POLICY, DEFAULT_GRPC_PORT
  from ray.serve._private.utils import DEFAULT
  from ray.serve.autoscaling_policy import default_autoscaling_policy
  from ray.serve.config import AutoscalingConfig, DeploymentMode, HTTPOptions, ProxyLocation, gRPCOptions
  from ray.serve.generated.serve_pb2 import AutoscalingConfig
  from ray.serve.generated.serve_pb2 import DeploymentConfig
  from ray.serve.generated.serve_pb2 import DeploymentLanguage
  from ray.serve.generated.serve_pb2_grpc import add_UserDefinedServiceServicer_to_server
  from ray.serve.schema import DeploymentSchema, HTTPOptionsSchema, ServeApplicationSchema, ServeDeploySchema
label_desc: Use image node_id 1 for calling the TestDeploymentConfig obj's underlying member method code with example usage: obj.test_deployment_config_validation() without return types