code: def test_dot(self, xp, dtype_a, dtype_b):
      shape_a, shape_b = self.shape
      if self.trans_a:
          a = testing.shaped_arange(shape_a[::-1], xp, dtype_a).T
      else:
          a = testing.shaped_arange(shape_a, xp, dtype_a)
      if self.trans_b:
          b = testing.shaped_arange(shape_b[::-1], xp, dtype_b).T
      else:
          b = testing.shaped_arange(shape_b, xp, dtype_b)
      return xp.dot(a, b)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestDot obj's underlying member method code with example usage: obj.test_dot(xp, dtype_a, dtype_b) and returns: xp