class_docstr: Test operations are placed in the correct locations.
docstr: Test single qubits gates on the same wire block each other.
docstr_tok: ["Test","single","qubits","gates","on","the","same","wire","block","each","other","."]
code: def test_blocking_ops(self):
      """Test single qubits gates on the same wire block each other."""
  
      @qml.qnode(qml.device("default.qubit", wires=1))
      def circ():
          _ = [qml.PauliX(0) for i in range(3)]
          return qml.expval(qml.PauliZ(0))
  
      expected = "0: ──X──X──X─┤  <Z>"
      assert draw(circ)() == expected
  
imports: from functools import partial
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.drawer import draw
label_desc: Use image node_id 2 for calling the TestLayering obj's underlying member method code with example usage: obj.test_blocking_ops() and returns: qml