code: def testComponentCustomExecutor(self):
      class EmptyComponentSpec(types.ComponentSpec):
          PARAMETERS = {}
          INPUTS = {}
          OUTPUTS = {}
  
      class MyComponent(base_component.BaseComponent):
          SPEC_CLASS = EmptyComponentSpec
          EXECUTOR_SPEC = executor_spec.ExecutorClassSpec(
              base_executor.BaseExecutor
          )
  
      class MyCustomExecutor(base_executor.BaseExecutor):
          pass
  
      custom_executor_component = MyComponent(
          spec=EmptyComponentSpec(),
          custom_executor_spec=executor_spec.ExecutorClassSpec(
              MyCustomExecutor
          ),
      )
      self.assertEqual(
          custom_executor_component.executor_spec.executor_class,
          MyCustomExecutor,
      )
  
      with self.assertRaisesRegex(
          TypeError, "should be an instance of ExecutorSpec"
      ):
          MyComponent(
              spec=EmptyComponentSpec(), custom_executor_spec=object
          )
  
imports: import tensorflow
  from tfx import types
  from tfx.dsl.components.base import base_component
  from tfx.dsl.components.base import base_executor
  from tfx.dsl.components.base import executor_spec
  from tfx.proto import example_gen_pb2
  from tfx.types import component_spec
  from tfx.types.system_executions import SystemExecution
  from tfx.utils import json_utils
label_desc: Use image node_id 7 for calling the ComponentTest obj's underlying member method code with example usage: obj.testComponentCustomExecutor() without return types