code: def test_one_dim_with_unique_values(self, xp, dtype):
      a = xp.array([1, 2, 3, 4, 5], dtype=dtype)
      b = xp.array([1, 2, 3, 4, 5], dtype=dtype)
      return xp.intersect1d(a, b, assume_unique=True)
  
imports: import warnings
  import numpy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestIntersect1d obj's underlying member method code with example usage: obj.test_one_dim_with_unique_values(xp, dtype) and returns: xp