code: def test_LinearDecayScheduler(self):
      scheduler = LinearDecayScheduler(start_value=10, max_steps=10)
      for i in range(10):
          value = scheduler.step()
          np.testing.assert_almost_equal(value, 10 - (i + 1), 8)
  
      for i in range(5):
          value = scheduler.step()
          np.testing.assert_almost_equal(value, 0, 8)
  
file_path: PARL/parl/utils/tests/scheduler_test.py
imports: import unittest
  import numpy
  from parl.utils.scheduler import *
label_desc: Use image node_id 6 for calling the TestScheduler obj's underlying member method code with example usage: obj.test_LinearDecayScheduler() without return types