code: def test_array_astype_to_string_discovery_empty(dt):
      # See also gh-19085
      arr = np.array([""], dtype=object)
      # Note, the itemsize is the `0 -> 1` logic, which should change.
      # The important part the test is rather that it does not error.
      assert (
          arr.astype(dt).dtype.itemsize == np.dtype(f"{dt}1").itemsize
      )
  
      # check the same thing for `np.can_cast` (since it accepts arrays)
      assert np.can_cast(arr, dt, casting="unsafe")
      assert not np.can_cast(arr, dt, casting="same_kind")
      # as well as for the object as a descriptor:
      assert np.can_cast("O", dt, casting="unsafe")
  
imports: import sys
  import numpy
  from numpy.core._rational_tests import rational
  import pytest
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_raises, assert_warns, HAS_REFCOUNT
label_desc: Use image node_id 5 for calling a global function with example usage: test_array_astype_to_string_discovery_empty(dt) without return types