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from unittest import TestCase
import numpy as np
from pyecsca.sca import Trace, downsample_average, downsample_pick, downsample_decimate
from .utils import plot
class SamplingTests(TestCase):
def setUp(self):
self._trace = Trace(np.array([20, 40, 50, 50, 10], dtype=np.dtype("i1")), None, None)
def test_downsample_average(self):
result = downsample_average(self._trace, 2)
self.assertIsNotNone(result)
self.assertIsInstance(result, Trace)
self.assertEqual(len(result.samples), 2)
self.assertEqual(result.samples[0], 30)
self.assertEqual(result.samples[1], 50)
def test_downsample_pick(self):
result = downsample_pick(self._trace, 2)
self.assertIsNotNone(result)
self.assertIsInstance(result, Trace)
self.assertEqual(len(result.samples), 3)
self.assertEqual(result.samples[0], 20)
self.assertEqual(result.samples[1], 50)
def test_downsample_decimate(self):
trace = Trace(np.array([20, 30, 55, 18, 15, 10, 35, 24, 21, 15, 10, 8, -10, -5,
-8, -12, -15, -18, -34, -21, -17, -10, -5, -12, -6, -2,
4, 8, 21, 28], dtype=np.dtype("i1")), None, None, None)
result = downsample_decimate(trace, 2)
self.assertIsNotNone(result)
self.assertIsInstance(result, Trace)
self.assertEqual(len(result.samples), 15)
plot(self, trace, result)
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