'Test that convolve works correctly when inputs are lists'

def test_list(self):

    x = [[[1, 1, 1], [1, 1, 1], [1, 1, 1]], [[1, 1, 1], [1, 1, 1], [1, 1, 1]], [[1, 1, 1], [1, 1, 1], [1, 1, 1]]]
    z = convolve(x, x, boundary=u'fill', fill_value=1, normalize_kernel=False)
    assert_array_almost_equal_nulp((z / 27), x, 10)
