code: def test_no_batches(self, time_mock: Mock) -> None:
      time_mock.return_value = 1
      throughput_metric = ThroughputMetric(
          batch_size=self.batch_size,
          world_size=self.world_size,
          window_seconds=100,
      )
      self.assertEqual(
          throughput_metric.compute(),
          {"throughput-throughput|total_examples": 0},
      )
  
file_path: torchrec/torchrec/metrics/tests/test_throughput.py
imports: import unittest
  from unittest.mock import Mock, patch
  from torchrec.metrics.throughput import ThroughputMetric
label_desc: Use image node_id 2 for calling the ThroughputMetricTest obj's underlying member method code with example usage: obj.test_no_batches(time_mock) without return types