code: def test_run_command(self) -> None:
      COMMAND = "echo 'Test Execution'"
      task = RuntimeTask("run-command-task")
      task.run_command(COMMAND)
      assert len(task._task_steps) == 1
      assert (
          task._task_steps[0].type
          == RuntimeTask._TaskStep.TYPE_RUN_COMMAND
      )
  
file_path: lazycluster/tests/test_runtime_task.py
imports: import pytest
  from lazycluster import RuntimeTask
label_desc: Use image node_id 3 for calling the TestRuntimeTask obj's underlying member method code with example usage: obj.test_run_command() without return types