class_docstr: Unittest for the dot function when ``pauli=True``
docstr: Test that the dot function returns a PauliSentence class.
docstr_tok: ["Test","that","the","dot","function","returns","a","PauliSentence","class","."]
code: def test_dot_returns_pauli_sentence(self):
      """Test that the dot function returns a PauliSentence class."""
      ps = qml.dot(coeffs, ops, pauli=True)
      assert isinstance(ps, PauliSentence)
  
imports: import pytest
  import pennylane
  from pennylane.ops import Hamiltonian, Prod, SProd, Sum
  from pennylane.pauli.pauli_arithmetic import PauliSentence
label_desc: Use image node_id 1 for calling the TestDotPauliSentence obj's underlying member method code with example usage: obj.test_dot_returns_pauli_sentence() without return types