code: def test_exponential_scheduler(
      init_lr, max_iter, gamma, iter_interval
  ):
      scheduler_tester(
          lrs.ExponentialScheduler,
          RefExponential,
          max_iter,
          [init_lr, gamma, iter_interval],
      )
  
file_path: nnabla/python/test/utils/learning_rate_scheduler/test_exponential_scheduler.py
imports: import pytest
  from learning_rate_scheduler_test_utils import scheduler_tester
  import nnabla.utils.learning_rate_scheduler
label_desc: Use image node_id 1 for calling a global function with example usage: test_exponential_scheduler(init_lr, max_iter, gamma, iter_interval) without return types