code: def test_pipe_inference_schedule_singlestage():
      sched = schedule.InferenceSchedule(
          micro_batches=4, stages=1, stage_id=0
      )
      assert sched.num_micro_batches == 4
      full = list(iter(sched))
      for idx, cmds in enumerate(full):
          assert len(cmds) == 2
          assert type(cmds[0]) == schedule.LoadMicroBatch
          assert type(cmds[1]) == schedule.ForwardPass
          assert cmds[0].buffer_id == cmds[1].buffer_id
      assert len(full) == sched.num_micro_batches
  
file_path: DeepSpeed/tests/unit/runtime/pipe/test_pipe_schedule.py
imports: import pytest
  import deepspeed.runtime.pipe.schedule
label_desc: Use image node_id 2 for calling a global function with example usage: test_pipe_inference_schedule_singlestage() without return types