def test_solar_noon():
    apparent_zenith = pd.Series([10])
    apparent_azimuth = pd.Series([180])
    tracker_data = tracking.singleaxis(apparent_zenith, apparent_azimuth,
                                       axis_tilt=0, axis_azimuth=0,
                                       max_angle=90, backtrack=True, 
                                       gcr=7.0/2.0)
    
    expect = pd.DataFrame({'aoi': 10, 'surface_azimuth': 90,
                           'surface_tilt': 0, 'tracker_theta': 0},
                           index=[0], dtype=np.float64)
    
    assert_frame_equal(expect, tracker_data)
dataset/ETHPy150Open pvlib/pvlib-python/pvlib/test/test_tracking.py/test_solar_noon/swapped operands of `/`