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# Copyright (c) IPython Development Team.
# Distributed under the terms of the Modified BSD License.
import unittest
import pytest
from ipykernel.inprocess.manager import InProcessKernelManager
# -----------------------------------------------------------------------------
# Test case
# -----------------------------------------------------------------------------
class InProcessKernelManagerTestCase(unittest.TestCase):
def setUp(self):
self.km = InProcessKernelManager()
def tearDown(self):
if self.km.has_kernel:
self.km.shutdown_kernel()
@pytest.mark.flaky
def test_interface(self):
"""Does the in-process kernel manager implement the basic KM interface?"""
km = self.km
assert not km.has_kernel
km.start_kernel()
assert km.has_kernel
assert km.kernel is not None
kc = km.client()
assert not kc.channels_running
kc.start_channels()
assert kc.channels_running
old_kernel = km.kernel
km.restart_kernel()
assert km.kernel is not None
assert km.kernel != old_kernel
km.shutdown_kernel()
assert not km.has_kernel
with pytest.raises(NotImplementedError):
km.interrupt_kernel()
with pytest.raises(NotImplementedError):
km.signal_kernel(9)
kc.stop_channels()
assert not kc.channels_running
def test_execute(self):
"""Does executing code in an in-process kernel work?"""
km = self.km
km.start_kernel()
kc = km.client()
kc.start_channels()
kc.wait_for_ready()
kc.execute("foo = 1")
assert km.kernel.shell.user_ns["foo"] == 1
def test_complete(self):
"""Does requesting completion from an in-process kernel work?"""
km = self.km
km.start_kernel()
kc = km.client()
kc.start_channels()
kc.wait_for_ready()
km.kernel.shell.push({"my_bar": 0, "my_baz": 1})
kc.complete("my_ba", 5)
msg = kc.get_shell_msg()
assert msg["header"]["msg_type"] == "complete_reply"
assert sorted(msg["content"]["matches"]) == ["my_bar", "my_baz"]
def test_inspect(self):
"""Does requesting object information from an in-process kernel work?"""
km = self.km
km.start_kernel()
kc = km.client()
kc.start_channels()
kc.wait_for_ready()
km.kernel.shell.user_ns["foo"] = 1
kc.inspect("foo")
msg = kc.get_shell_msg()
assert msg["header"]["msg_type"] == "inspect_reply"
content = msg["content"]
assert content["found"]
text = content["data"]["text/plain"]
assert "int" in text
def test_history(self):
"""Does requesting history from an in-process kernel work?"""
km = self.km
km.start_kernel()
kc = km.client()
kc.start_channels()
kc.wait_for_ready()
kc.execute("1")
kc.history(hist_access_type="tail", n=1)
msg = kc.shell_channel.get_msgs()[-1]
assert msg["header"]["msg_type"] == "history_reply"
history = msg["content"]["history"]
assert len(history) == 1
assert history[0][2] == "1"
if __name__ == "__main__":
unittest.main()
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