def METHOD_NAME(self):
    time_slot, production_state = self._setup_default_test_production_state()
    initial_available_energy = production_state.get_available_energy_kWh(time_slot)
    sold_energy = 0.3
    production_state.decrement_available_energy(sold_energy_kWh=sold_energy,
                                                time_slot=time_slot,
                                                area_name="test_area")
    production_state.decrement_available_energy(sold_energy_kWh=sold_energy,
                                                time_slot=time_slot,
                                                area_name="test_area")
    assert isclose(
        production_state.get_available_energy_kWh(time_slot),
        initial_available_energy - 2 * sold_energy
    )