def test1(self):

        pitch = PitchSystemCost()

        pitch.pitch_system_mass = 17004.0
        pitch.year = 2009
        pitch.month = 12

        check_gradient_unit_test(self, pitch)
    def test1(self):

        pitch = PitchSystemCost()

        pitch.pitch_system_mass = 17004.0
        pitch.year = 2009
        pitch.month = 12

        check_gradient_unit_test(self, pitch)