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from unittest import TestCase
import numpy as np
from pyecsca.sca import (
Trace,
CombinedTrace,
average,
conditional_average,
standard_deviation,
variance,
average_and_variance,
add,
subtract,
)
class CombineTests(TestCase):
def setUp(self):
self.a = Trace(np.array([20, 80], dtype=np.dtype("i1")), {"data": b"\xff"})
self.b = Trace(np.array([30, 42], dtype=np.dtype("i1")), {"data": b"\xff"})
self.c = Trace(np.array([78, 56], dtype=np.dtype("i1")), {"data": b"\x00"})
def test_average(self):
self.assertIsNone(average())
result = average(self.a, self.b)
self.assertIsNotNone(result)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(len(result.samples), 2)
self.assertEqual(result.samples[0], 25)
self.assertEqual(result.samples[1], 61)
def test_conditional_average(self):
result = conditional_average(
self.a,
self.b,
self.c,
condition=lambda trace: trace.meta["data"] == b"\xff",
)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(len(result.samples), 2)
self.assertEqual(result.samples[0], 25)
self.assertEqual(result.samples[1], 61)
def test_standard_deviation(self):
self.assertIsNone(standard_deviation())
result = standard_deviation(self.a, self.b)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(len(result.samples), 2)
def test_variance(self):
self.assertIsNone(variance())
result = variance(self.a, self.b)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(len(result.samples), 2)
def test_average_and_variance(self):
self.assertIsNone(average_and_variance())
mean, var = average_and_variance(self.a, self.b)
self.assertIsInstance(mean, CombinedTrace)
self.assertIsInstance(var, CombinedTrace)
self.assertEqual(len(mean.samples), 2)
self.assertEqual(len(var.samples), 2)
self.assertEqual(mean, average(self.a, self.b))
self.assertEqual(var, variance(self.a, self.b))
def test_add(self):
self.assertIsNone(add())
result = add(self.a, self.b)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(result.samples[0], 50)
self.assertEqual(result.samples[1], 122)
np.testing.assert_equal(self.a.samples, add(self.a).samples)
def test_subtract(self):
result = subtract(self.a, self.b)
self.assertIsInstance(result, CombinedTrace)
self.assertEqual(result.samples[0], -10)
self.assertEqual(result.samples[1], 38)
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