def test_normalize_frequencies(self):
assert_allclose(1200., _normalize_frequencies(1200.))
assert_allclose(1200., _normalize_frequencies("1.2 kHz"))
assert_allclose(1.0, _normalize_frequencies([1.0]))
assert_allclose(1.0, _normalize_frequencies(["1 Hz"]))
assert_allclose([1.0, 2.0], _normalize_frequencies([1.0, 2.0]))
assert_allclose([1.0, 2.0], _normalize_frequencies(["1 Hz", "2 Hz"]))
def test_normalize_frequencies_invalid(self):
_normalize_frequencies(None)
def test_normalize_frequencies_invalid(self):
with self.assertRaises(ValueError):
_normalize_frequencies(None)