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"""Tests for the notebook kernel and session manager."""
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from subprocess import PIPE
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import time
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from unittest import TestCase
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from IPython.testing import decorators as dec
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from IPython.config.loader import Config
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from IPython.utils.localinterfaces import LOCALHOST
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from IPython.kernel import KernelManager
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from IPython.kernel.multikernelmanager import MultiKernelManager
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class TestKernelManager(TestCase):
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def _get_tcp_km(self):
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c = Config()
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# c.KernelManager.autorestart=False
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km = MultiKernelManager(config=c)
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return km
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def _get_ipc_km(self):
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c = Config()
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c.KernelManager.transport = 'ipc'
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c.KernelManager.ip = 'test'
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# c.KernelManager.autorestart=False
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km = MultiKernelManager(config=c)
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return km
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def _run_lifecycle(self, km):
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kid = km.start_kernel(stdout=PIPE, stderr=PIPE)
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self.assertTrue(km.is_alive(kid))
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self.assertTrue(kid in km)
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self.assertTrue(kid in km.list_kernel_ids())
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self.assertEqual(len(km),1)
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km.restart_kernel(kid)
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self.assertTrue(km.is_alive(kid))
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self.assertTrue(kid in km.list_kernel_ids())
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# We need a delay here to give the restarting kernel a chance to
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# restart. Otherwise, the interrupt will kill it, causing the test
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# suite to hang. The reason it *hangs* is that the shutdown
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# message for the restart sometimes hasn't been sent to the kernel.
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# Because linger is oo on the shell channel, the context can't
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# close until the message is sent to the kernel, which is not dead.
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time.sleep(1.0)
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km.interrupt_kernel(kid)
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k = km.get_kernel(kid)
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self.assertTrue(isinstance(k, KernelManager))
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km.shutdown_kernel(kid)
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self.assertTrue(not kid in km)
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def _run_cinfo(self, km, transport, ip):
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kid = km.start_kernel(stdout=PIPE, stderr=PIPE)
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k = km.get_kernel(kid)
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cinfo = km.get_connection_info(kid)
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self.assertEqual(transport, cinfo['transport'])
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self.assertEqual(ip, cinfo['ip'])
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self.assertTrue('stdin_port' in cinfo)
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self.assertTrue('iopub_port' in cinfo)
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stream = km.connect_iopub(kid)
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stream.close()
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self.assertTrue('shell_port' in cinfo)
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stream = km.connect_shell(kid)
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stream.close()
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self.assertTrue('hb_port' in cinfo)
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stream = km.connect_hb(kid)
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stream.close()
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km.shutdown_kernel(kid)
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def test_tcp_lifecycle(self):
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km = self._get_tcp_km()
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self._run_lifecycle(km)
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def test_tcp_cinfo(self):
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km = self._get_tcp_km()
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self._run_cinfo(km, 'tcp', LOCALHOST)
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@dec.skip_win32
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def test_ipc_lifecycle(self):
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km = self._get_ipc_km()
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self._run_lifecycle(km)
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@dec.skip_win32
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def test_ipc_cinfo(self):
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km = self._get_ipc_km()
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self._run_cinfo(km, 'ipc', 'test')
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