docstr: Test the functionality of the linearly_decaying_epsilon function.
docstr_tok: ["Test","the","functionality","of","the","linearly_decaying_epsilon","function","."]
code: def testLinearlyDecayingEpsilon(self):
      """Test the functionality of the linearly_decaying_epsilon function."""
      decay_period = 100
      warmup_steps = 6
      epsilon = 0.1
      steps_schedule = [
          (0, 1.0),  # step < warmup_steps
          (16, 0.91),  # bonus = 0.9 * 90 / 100 = 0.81
          (decay_period + warmup_steps + 1, epsilon),
      ]  # step > decay+warmup
      for step, expected_epsilon in steps_schedule:
          onp.testing.assert_almost_equal(
              dqn_agent.linearly_decaying_epsilon(
                  decay_period, step, warmup_steps, epsilon
              ),
              expected_epsilon,
              0.01,
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  from absl import flags
  from absl.testing import absltest
  from dopamine.discrete_domains import atari_lib
  from dopamine.jax.agents.dqn import dqn_agent
  from dopamine.utils import test_utils
  from flax import linen
  import gin
  import jax.numpy
  import mock
  import numpy
label_desc: Use image node_id 18 for calling the DQNAgentTest obj's underlying member method code with example usage: obj.testLinearlyDecayingEpsilon() without return types