class_docstr: Tests that the template defines the correct decomposition.
class_docstr_tok: ["Tests","that","the","template","defines","the","correct","decomposition","."]
docstr: Test that the template prepares an even superposition state.
docstr_tok: ["Test","that","the","template","prepares","an","even","superposition","state","."]
code: def test_even_superposition_generation(self, tol):
      """Test that the template prepares an even superposition state."""
      even_superposition_state = np.ones(8) / np.sqrt(8)
  
      weights = np.zeros(14)
      weights[1] = np.pi / 2
      weights[3] = np.pi / 2
      weights[5] = np.pi / 2
  
      @qml.qnode(qml.device("default.qubit"))
      def circuit(weights):
          qml.ArbitraryStatePreparation(weights, [0, 1, 2])
  
          return qml.expval(qml.PauliZ(0)), qml.state()
  
      _, state = circuit(weights)
  
      assert np.allclose(
          state, even_superposition_state, atol=tol, rtol=0
      )
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane import numpy
  from pennylane.templates.state_preparations.arbitrary_state_preparation import _state_preparation_pauli_words
label_desc: Use image node_id 4 for calling the TestDecomposition obj's underlying member method code with example usage: obj.test_even_superposition_generation(tol) and returns: qml,  qml