code: def test_trunc(self):
      self.check_unary("trunc")
      self.check_unary_complex_unsupported("trunc")
  
imports: import unittest
  import warnings
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 10 for calling the TestRounding obj's underlying member method code with example usage: obj.test_trunc() without return types