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import numpy as np
from numpy.testing import assert_array_equal
from numpy.random.bit_generator import SeedSequence
def test_reference_data():
""" Check that SeedSequence generates data the same as the C++ reference.
https://gist.github.com/imneme/540829265469e673d045
"""
inputs = [
[3735928559, 195939070, 229505742, 305419896],
[3668361503, 4165561550, 1661411377, 3634257570],
[164546577, 4166754639, 1765190214, 1303880213],
[446610472, 3941463886, 522937693, 1882353782],
[1864922766, 1719732118, 3882010307, 1776744564],
[4141682960, 3310988675, 553637289, 902896340],
[1134851934, 2352871630, 3699409824, 2648159817],
[1240956131, 3107113773, 1283198141, 1924506131],
[2669565031, 579818610, 3042504477, 2774880435],
[2766103236, 2883057919, 4029656435, 862374500],
]
outputs = [
[3914649087, 576849849, 3593928901, 2229911004],
[2240804226, 3691353228, 1365957195, 2654016646],
[3562296087, 3191708229, 1147942216, 3726991905],
[1403443605, 3591372999, 1291086759, 441919183],
[1086200464, 2191331643, 560336446, 3658716651],
[3249937430, 2346751812, 847844327, 2996632307],
[2584285912, 4034195531, 3523502488, 169742686],
[959045797, 3875435559, 1886309314, 359682705],
[3978441347, 432478529, 3223635119, 138903045],
[296367413, 4262059219, 13109864, 3283683422],
]
for seed, expected in zip(inputs, outputs):
expected = np.array(expected, dtype=np.uint32)
ss = SeedSequence(seed)
state = ss.generate_state(len(expected))
assert_array_equal(state, expected)
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