class_docstr: Unittest for the dot function when ``pauli=True``
docstr: Test that the dot function groups equal pauli words.
docstr_tok: ["Test","that","the","dot","function","groups","equal","pauli","words","."]
code: def test_dot_simplifies_linear_combination(self):
      """Test that the dot function groups equal pauli words."""
      ps = qml.dot(
          coeffs=[0.12, 1.2, 12],
          ops=[qml.PauliX(0), qml.PauliX(0), qml.PauliX(0)],
          pauli=True,
      )
      assert len(ps) == 1
      h = ps.hamiltonian()
      assert len(h.ops) == 1
      assert qml.equal(h.ops[0], qml.PauliX(0))
  
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 3 for calling the TestDotPauliSentence obj's underlying member method code with example usage: obj.test_dot_simplifies_linear_combination() without return types