Failure in snippets

[Nima Sarajpoor]

The test function tests/test_snippets.py::test_mpdist_snippets_s_with_isconstant may sometimes fail. The following script exposes the failure:

# stumpy version: 1.12.0

import numpy as np 
import numpy.testing as npt
import functools
import naive
from stumpy import snippets
from stumpy import config


def test_func(T):  # test_mpdist_snippets_s_with_isconstant
    m = 8
    k = 3
    s = 3

    isconstant_custom_func = functools.partial(
        naive.isconstant_func_stddev_threshold, quantile_threshold=0.05
    )
    (
        ref_snippets,
        ref_indices,
        ref_profiles,
        ref_fractions,
        ref_areas,
        ref_regimes,
    ) = naive.mpdist_snippets(
        T, m, k, s=s, mpdist_T_subseq_isconstant=isconstant_custom_func
    )
    (
        cmp_snippets,
        cmp_indices,
        cmp_profiles,
        cmp_fractions,
        cmp_areas,
        cmp_regimes,
    ) = snippets(T, m, k, s=s, mpdist_T_subseq_isconstant=isconstant_custom_func)

    npt.assert_almost_equal(
        ref_snippets, cmp_snippets, decimal=config.STUMPY_TEST_PRECISION
    )
    npt.assert_almost_equal(
        ref_indices, cmp_indices, decimal=config.STUMPY_TEST_PRECISION
    )
    npt.assert_almost_equal(
        ref_profiles, cmp_profiles, decimal=config.STUMPY_TEST_PRECISION
    )
    npt.assert_almost_equal(
        ref_fractions, cmp_fractions, decimal=config.STUMPY_TEST_PRECISION
    )
    npt.assert_almost_equal(ref_areas, cmp_areas, decimal=config.STUMPY_TEST_PRECISION)
    npt.assert_almost_equal(ref_regimes, cmp_regimes)



if __name__ == '__main__':
    seed = 455
    np.random.seed(seed)
    T = np.random.uniform(-1000, 1000, [64]).astype(np.float64)
    test_func(T)

[Note]
The last three assertions are passing.