/usr/lib/python3/dist-packages/ipykernel/tests/test_io.py is in python3-ipykernel 4.8.2-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | """Test IO capturing functionality"""
import io
import zmq
from jupyter_client.session import Session
from ipykernel.iostream import IOPubThread, OutStream
import nose.tools as nt
def test_io_api():
"""Test that wrapped stdout has the same API as a normal TextIO object"""
session = Session()
ctx = zmq.Context()
pub = ctx.socket(zmq.PUB)
thread = IOPubThread(pub)
thread.start()
stream = OutStream(session, thread, 'stdout')
# cleanup unused zmq objects before we start testing
thread.stop()
thread.close()
ctx.term()
assert stream.errors is None
assert not stream.isatty()
with nt.assert_raises(io.UnsupportedOperation):
stream.detach()
with nt.assert_raises(io.UnsupportedOperation):
next(stream)
with nt.assert_raises(io.UnsupportedOperation):
stream.read()
with nt.assert_raises(io.UnsupportedOperation):
stream.readline()
with nt.assert_raises(io.UnsupportedOperation):
stream.seek()
with nt.assert_raises(io.UnsupportedOperation):
stream.tell()
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