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from unittest import TestCase
import numpy as np
from pyecsca.sca import Trace, trim, reverse, pad
class EditTests(TestCase):
def setUp(self):
self._trace = Trace(np.array([10, 20, 30, 40, 50], dtype=np.dtype("i1")))
def test_trim(self):
result = trim(self._trace, 2)
self.assertIsNotNone(result)
np.testing.assert_equal(
result.samples, np.array([30, 40, 50], dtype=np.dtype("i1"))
)
result = trim(self._trace, end=3)
self.assertIsNotNone(result)
np.testing.assert_equal(
result.samples, np.array([10, 20, 30], dtype=np.dtype("i1"))
)
with self.assertRaises(ValueError):
trim(self._trace, 5, 1)
def test_reverse(self):
result = reverse(self._trace)
self.assertIsNotNone(result)
np.testing.assert_equal(
result.samples, np.array([50, 40, 30, 20, 10], dtype=np.dtype("i1"))
)
def test_pad(self):
result = pad(self._trace, 2)
self.assertIsNotNone(result)
np.testing.assert_equal(
result.samples,
np.array([0, 0, 10, 20, 30, 40, 50, 0, 0], dtype=np.dtype("i1")),
)
result = pad(self._trace, (1, 3))
self.assertIsNotNone(result)
np.testing.assert_equal(
result.samples,
np.array([0, 10, 20, 30, 40, 50, 0, 0, 0], dtype=np.dtype("i1")),
)
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