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41 lines
1.1 KiB
41 lines
1.1 KiB
"""Test IO capturing functionality"""
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import io
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import zmq
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from jupyter_client.session import Session
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from ipykernel.iostream import IOPubThread, OutStream
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import nose.tools as nt
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def test_io_api():
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"""Test that wrapped stdout has the same API as a normal TextIO object"""
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session = Session()
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ctx = zmq.Context()
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pub = ctx.socket(zmq.PUB)
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thread = IOPubThread(pub)
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thread.start()
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stream = OutStream(session, thread, 'stdout')
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# cleanup unused zmq objects before we start testing
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thread.stop()
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thread.close()
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ctx.term()
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assert stream.errors is None
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assert not stream.isatty()
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with nt.assert_raises(io.UnsupportedOperation):
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stream.detach()
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with nt.assert_raises(io.UnsupportedOperation):
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next(stream)
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with nt.assert_raises(io.UnsupportedOperation):
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stream.read()
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with nt.assert_raises(io.UnsupportedOperation):
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stream.readline()
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with nt.assert_raises(io.UnsupportedOperation):
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stream.seek(0)
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with nt.assert_raises(io.UnsupportedOperation):
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stream.tell()
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