def test1(self): nacelle = NacelleSystemCostAdder() nacelle.bedplate_mass = 93090.6 nacelle.machine_rating = 5000.0 nacelle.drivetrainDesign = 1 nacelle.crane = True nacelle.offshore = True nacelle.year = 2009 nacelle.month = 12 nacelle.lss_cost = 10000.0 nacelle.bearings_cost = 10000.0 nacelle.gearbox_cost = 10000.0 nacelle.hss_cost = 10000.0 nacelle.bedplate_cost = 10000.0 nacelle.bedplateCost2002 = 8000.0 nacelle.yaw_system_cost = 10000.0 check_gradient_unit_test(self, nacelle, tol=1e-5)