code: def test_imag_zero_dim(self, xp, dtype):
      x = xp.array(1, dtype=dtype)
      return x.imag
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 5 for calling the TestRealImag obj's underlying member method code with example usage: obj.test_imag_zero_dim(xp, dtype) and returns: x