import sampling
import numpy as np
import pylab

def test_resample():
    x = np.arange(300)
    s = sampling.Sampler(x, )
    y = np.array(list(s))

    w = s.interp.width
    x = x[w-1:-w]
    err = x - y
    assert np.max(np.abs(err)) < 1e-10

def test_coeffs():
    I = sampling.Interpolator(width=4, resolution=16)
    err = I.filt[0] - [0,0,0,1,0,0,0,0]
    assert np.max(np.abs(err)) < 1e-10