class_docstr: Test the transform program class and its method.
docstr: Test the pop front method of the transform program.
docstr_tok: ["Test","the","pop","front","method","of","the","transform","program","."]
code: def test_pop_front(self):
      """Test the pop front method of the transform program."""
      transform_program = TransformProgram()
  
      transform1 = TransformContainer(transform=first_valid_transform)
      transform_program.push_back(transform1)
  
      assert not transform_program.is_empty()
      assert len(transform_program) == 1
      assert isinstance(transform_program[0], TransformContainer)
      assert transform_program[0].transform is first_valid_transform
  
      transform_container = transform_program.pop_front()
  
      assert transform_program.is_empty()
      assert transform_container is transform1
  
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 5 for calling the TestTransformProgram obj's underlying member method code with example usage: obj.test_pop_front() without return types