class_docstr: Test the transform program class and its method.
docstr: Test an empty program.
docstr_tok: ["Test","an","empty","program","."]
code: def test_empty_program(self):
      """Test an empty program."""
      program = TransformProgram()
      assert program.is_empty()
      assert len(program) == 0
  
      with pytest.raises(
          TransformError,
          match="The transform program is empty and you cannot get the last "
          "transform container.",
      ):
          program.get_last()
  
imports: from typing import Sequence, Callable
  import pytest
  import pennylane
  from pennylane.tape import QuantumScript
  from pennylane.transforms.core import transform, TransformProgram, TransformError, TransformContainer
  from pennylane.transforms.core.transform_program import _batch_postprocessing, _apply_postprocessing_stack, null_postprocessing
  from pennylane.typing import ResultBatch, Result
label_desc: Use image node_id 1 for calling the TestTransformProgram obj's underlying member method code with example usage: obj.test_empty_program() without return types