def METHOD_NAME(self):
    """qubits 2 py h2 test"""
    num_particles = (1, 1)
    mapper = TaperedQubitMapper(ParityMapper(num_particles))
    state = HartreeFock(2, num_particles, mapper)
    ref = QuantumCircuit(2)
    ref.x(0)
    self.assertEqual(state, ref)