code: def test_bool_two_elements(self, dtype):
      with self.assertRaises(ValueError):
          bool(cupy.array([1, 2], dtype=dtype))
  
imports: import operator
  import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 6 for calling the TestArrayBoolOp obj's underlying member method code with example usage: obj.test_bool_two_elements(dtype) without return types