def test_asarray_with_illegal_mode_raises_error():
trace = Trace([[0, 0], [1, 5]])
with pytest.raises(ValueError) as excinfo:
trace.asarray('wrong mode')
assert 'invalid mode' in str(excinfo.value).lower()
def test_asarray(data, mode, expected):
trace = Trace(data)
actual = trace.asarray(mode)
assert isinstance(actual, np.ndarray)
np.testing.assert_almost_equal(actual, expected)