'Test for false positive on allclose in normalize() in
filter_design.py'

def test_allclose(self):

    b_matlab = np.array([2.150733144728282e-11, 1.720586515782626e-10, 6.02205280523919e-10, 1.204410561047838e-09, 1.505513201309798e-09, 1.204410561047838e-09, 6.02205280523919e-10, 1.720586515782626e-10, 2.150733144728282e-11])
    a_matlab = np.array([1.0, (-7.782402035027959), 26.54354569747454, (-51.82182531666387), 63.34127355102684, (-49.63358186631157), 24.34862182949389, (-6.836925348604676), 0.841293494444914])
    b_norm_in = np.array([1.5543135865293012e-06, 1.2434508692234413e-05, 4.352078042282045e-05, 8.70415608456409e-05, 0.00010880195105705122, 8.704156084564097e-05, 4.352078042282045e-05, 1.2434508692234413e-05, 1.5543135865293012e-06])
    a_norm_in = np.array([72269.02590912717, (-562426.6143046797), 1918276.1917308895, (-3745112.8364682454), 4577612.139376277, (-3586970.6138592605), 1759651.1818472347, (-494097.93515707983), 60799.46134721965])
    (b_output, a_output) = normalize(b_norm_in, a_norm_in)
    assert_array_almost_equal(b_matlab, b_output, decimal=13)
    assert_array_almost_equal(a_matlab, a_output, decimal=13)
