'Test smoothing of an image with a single positive pixel'

@pytest.mark.parametrize(u'width', WIDTHS_ODD)
def test_smallkernel_vs_Box2DKernel(self, width):

    kernel1 = (np.ones([width, width]) / (width ** 2))
    kernel2 = Box2DKernel(width)
    c2 = convolve_fft(delta_pulse_2D, kernel2, boundary=u'fill')
    c1 = convolve_fft(delta_pulse_2D, kernel1, boundary=u'fill')
    assert_almost_equal(c1, c2, decimal=12)
