code: def test_fermionic_hamiltonian(symbols, geometry, alpha, h_ref):
      r"""Test that fermionic_hamiltonian returns the correct Hamiltonian."""
      mol = qchem.Molecule(symbols, geometry, alpha=alpha)
      args = [alpha]
      h = qchem.fermionic_hamiltonian(mol)(*args)
  
      assert np.allclose(list(h.values()), list(h_ref.values()))
      assert h.keys() == h_ref.keys()
  
file_path: pennylane/tests/qchem/test_hamiltonians.py
imports: import pytest
  import pennylane
  from pennylane import Identity, PauliX, PauliY, PauliZ
  from pennylane import numpy
  from pennylane import qchem
  from pennylane.operation import disable_new_opmath, enable_new_opmath
  from pennylane.fermi import from_string
label_desc: Use image node_id 2 for calling a global function with example usage: test_fermionic_hamiltonian(symbols, geometry, alpha, h_ref) without return types