code: def testSlice(self, start: int, stop: int, step: int):
      kwargs = {}
      if start is not None:
          kwargs["start"] = start
      if stop is not None:
          kwargs["stop"] = stop
      if step is not None:
          kwargs["step"] = step
      self.assertEqual(
          self._slice(self._artifacts, **kwargs),
          self._artifacts[start:stop:step],
      )
  
file_path: tfx/tfx/dsl/input_resolution/ops/slice_op_test.py
imports: from absl.testing import parameterized
  import tensorflow
  from tfx.dsl.input_resolution.ops import ops
  from tfx.dsl.input_resolution.ops import test_utils
  from tfx.orchestration.portable.input_resolution import exceptions
  from tfx.types import artifact
label_desc: Use image node_id 2 for calling the SliceOpTest obj's underlying member method code with example usage: obj.testSlice(start, stop, step) without return types