code: def test_recall(self):
      name = "recall"
      Metric = metrics_dict[name](config)
      self.assertEqual(
          Metric.metric_info(pos_idx, pos_len).tolist(),
          np.array(
              [
                  [0, 0, 0],
                  [1 / 3, 2 / 3, 3 / 3],
                  [1 / 4, 1 / 4, 2 / 4],
                  [0, 0, 1 / 2],
              ]
          ).tolist(),
      )
  
file_path: RecBole/tests/metrics/test_topk_metrics.py
imports: import os
  import sys
  import unittest
  import numpy
  from recbole.config import Config
  from recbole.evaluator.register import metrics_dict
label_desc: Use image node_id 5 for calling the TestTopKMetrics obj's underlying member method code with example usage: obj.test_recall() without return types