def test_rectify_channels_copy(self):
"""Rectify channels must not change the original parameter."""
cpy = self.dat.copy()
rectify_channels(self.dat)
self.assertEqual(cpy, self.dat)
def test_rectify_channels(self):
"""Rectify channels of positive and negative data must be equal."""
dat = rectify_channels(self.dat.copy(data=-self.dat.data))
dat2 = rectify_channels(self.dat)
self.assertEqual(dat, dat2)
