code: def test_without_paren(self):
      @cupy.fuse
      def func_wo_paren(x):
          """Fuse without parentheses"""
          return x + x
  
      assert func_wo_paren.__name__ == "func_wo_paren"
      assert func_wo_paren.__doc__ == "Fuse without parentheses"
  
imports: import threading
  import unittest
  from unittest import mock
  import pytest
  import cupy
  from cupy import testing
  from cupy_tests.core_tests.fusion_tests import fusion_utils
label_desc: Use image node_id 1 for calling the TestFusionDecorator obj's underlying member method code with example usage: obj.test_without_paren() and returns: unknown