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import numpy as np
import pytest
from pyecsca.sca import (
Trace,
StackedTraces,
TraceSet,
)
TRACE_COUNT = 2 ** 10
TRACE_LEN = 2 ** 15
@pytest.fixture()
def samples():
np.random.seed(0x1234)
return np.random.rand(TRACE_COUNT, TRACE_LEN)
def test_fromarray(samples):
max_len = samples.shape[1]
min_len = max_len // 2
jagged_samples = [
t[min_len:np.random.randint(max_len)]
for t
in samples
]
min_len = min(map(len, jagged_samples))
stacked = StackedTraces.fromarray(jagged_samples)
assert isinstance(stacked, StackedTraces)
assert stacked.samples.shape == \
(samples.shape[0], min_len)
assert (stacked.samples == samples[:, :min_len]).all()
def test_fromtraceset(samples):
max_len = samples.shape[1]
min_len = max_len // 2
traces = [
Trace(t[min_len:np.random.randint(max_len)])
for t
in samples
]
tset = TraceSet(*traces)
min_len = min(map(len, traces))
stacked = StackedTraces.fromtraceset(tset)
assert isinstance(stacked, StackedTraces)
assert stacked.samples.shape == \
(samples.shape[0], min_len)
assert (stacked.samples == samples[:, :min_len]).all()
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