code: def test_single_task() -> None:
      """Tests running an execution plan with a single task."""
      task = NoOpExecutionPlanTask()
      execution_plan = ExecutionPlan("plan0", leaf_tasks=[task])
      results = SequentialPlanExecutor().execute_plan(execution_plan)
      assert results.get_result(task.task_id)
  
file_path: metricflow/metricflow/test/execution/test_sequential_executor.py
imports: from __future__ import annotations
  from metricflow.execution.execution_plan import ExecutionPlan
  from metricflow.execution.executor import SequentialPlanExecutor
  from metricflow.test.execution.noop_task import NoOpExecutionPlanTask
label_desc: Use image node_id 1 for calling a global function with example usage: test_single_task() without return types