code: def test_eps_validation(optimizer_class):
      eps = -0.1
      with pytest.raises(ValueError) as ctx:
          optimizer_class(None, lr=0.1, eps=eps)
      msg = "Invalid epsilon value: {}".format(eps)
      assert msg in str(ctx.value)
  
file_path: pytorch-optimizer/tests/test_param_validation.py
imports: import pytest
  import torch
  import torch_optimizer
label_desc: Use image node_id 4 for calling a global function with example usage: test_eps_validation(optimizer_class) without return types