code: def test_unique_equal_nan_no_axis(self, xp, dtype, equal_nan):
      if xp.dtype(dtype).kind == "c":
          # Nan and Nan+Nan*1j are collapsed when equal_nan=True
          a = xp.array(
              [
                  complex(xp.nan, 3),
                  2,
                  complex(7, xp.nan),
                  xp.nan,
                  complex(xp.nan, xp.nan),
                  2,
                  xp.nan,
                  1,
              ],
              dtype=dtype,
          )
      else:
          a = xp.array([2, xp.nan, 2, xp.nan, 1], dtype=dtype)
      return xp.unique(a, equal_nan=equal_nan)
  
imports: import unittest
  import pytest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 15 for calling the TestUnique obj's underlying member method code with example usage: obj.test_unique_equal_nan_no_axis(xp, dtype, equal_nan) and returns: xp