code: def test_coercion_assignment_timedelta(self, val, unit):
      scalar = np.timedelta64(val, unit)
  
      # Unlike datetime64, timedelta allows the unsafe cast:
      np.array(scalar, dtype="S6")
      cast = np.array(scalar).astype("S6")
      ass = np.ones((), dtype="S6")
      ass[()] = scalar
      expected = scalar.astype("S")[:6]
      assert cast[()] == expected
      assert ass[()] == expected
  
imports: from itertools import permutations, product
  import pytest
  from pytest import param
  import numpy
  from numpy.core._rational_tests import rational
  from numpy.core._multiarray_umath import _discover_array_parameters
  from numpy.testing import assert_array_equal, assert_warns, IS_PYPY
label_desc: Use image node_id 4 for calling the TestTimeScalars obj's underlying member method code with example usage: obj.test_coercion_assignment_timedelta(val, unit) without return types