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"""Test suite for our zeromq-based messaging specification.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010-2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING.txt, distributed as part of this software.
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#-----------------------------------------------------------------------------
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import re
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import sys
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import time
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from subprocess import PIPE
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from Queue import Empty
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import nose.tools as nt
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from IPython.kernel import KernelManager, BlockingKernelClient
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from IPython.testing import decorators as dec
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from IPython.utils import io
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from IPython.utils.traitlets import (
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HasTraits, TraitError, Bool, Unicode, Dict, Integer, List, Enum, Any,
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)
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#-----------------------------------------------------------------------------
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# Global setup and utilities
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#-----------------------------------------------------------------------------
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def setup():
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global KM, KC
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KM = KernelManager()
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KM.client_factory = BlockingKernelClient
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KM.start_kernel(stdout=PIPE, stderr=PIPE)
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KC = KM.client()
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KC.start_channels()
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# wait for kernel to be ready
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KC.execute("pass")
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KC.get_shell_msg(block=True, timeout=5)
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flush_channels()
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def teardown():
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KC.stop_channels()
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KM.shutdown_kernel()
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def flush_channels(kc=None):
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"""flush any messages waiting on the queue"""
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if kc is None:
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kc = KC
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for channel in (kc.shell_channel, kc.iopub_channel):
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while True:
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try:
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msg = channel.get_msg(block=True, timeout=0.1)
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except Empty:
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break
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else:
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list(validate_message(msg))
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def execute(code='', kc=None, **kwargs):
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"""wrapper for doing common steps for validating an execution request"""
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msg_id = KC.execute(code=code, **kwargs)
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reply = KC.get_shell_msg(timeout=2)
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list(validate_message(reply, 'execute_reply', msg_id))
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busy = KC.get_iopub_msg(timeout=2)
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list(validate_message(busy, 'status', msg_id))
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nt.assert_equal(busy['content']['execution_state'], 'busy')
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if not kwargs.get('silent'):
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pyin = KC.get_iopub_msg(timeout=2)
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list(validate_message(pyin, 'pyin', msg_id))
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nt.assert_equal(pyin['content']['code'], code)
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return msg_id, reply['content']
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#-----------------------------------------------------------------------------
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# MSG Spec References
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#-----------------------------------------------------------------------------
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class Reference(HasTraits):
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"""
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Base class for message spec specification testing.
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This class is the core of the message specification test. The
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idea is that child classes implement trait attributes for each
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message keys, so that message keys can be tested against these
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traits using :meth:`check` method.
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"""
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def check(self, d):
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"""validate a dict against our traits"""
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for key in self.trait_names():
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yield nt.assert_true(key in d, "Missing key: %r, should be found in %s" % (key, d))
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# FIXME: always allow None, probably not a good idea
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if d[key] is None:
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continue
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try:
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setattr(self, key, d[key])
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except TraitError as e:
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yield nt.assert_true(False, str(e))
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class RMessage(Reference):
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msg_id = Unicode()
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msg_type = Unicode()
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header = Dict()
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parent_header = Dict()
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content = Dict()
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class RHeader(Reference):
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msg_id = Unicode()
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msg_type = Unicode()
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session = Unicode()
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username = Unicode()
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class RContent(Reference):
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status = Enum((u'ok', u'error'))
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class ExecuteReply(Reference):
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execution_count = Integer()
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status = Enum((u'ok', u'error'))
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def check(self, d):
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for tst in Reference.check(self, d):
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yield tst
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if d['status'] == 'ok':
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for tst in ExecuteReplyOkay().check(d):
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yield tst
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elif d['status'] == 'error':
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for tst in ExecuteReplyError().check(d):
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yield tst
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class ExecuteReplyOkay(Reference):
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payload = List(Dict)
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user_variables = Dict()
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user_expressions = Dict()
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class ExecuteReplyError(Reference):
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ename = Unicode()
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evalue = Unicode()
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traceback = List(Unicode)
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class OInfoReply(Reference):
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name = Unicode()
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found = Bool()
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ismagic = Bool()
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isalias = Bool()
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namespace = Enum((u'builtin', u'magics', u'alias', u'Interactive'))
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type_name = Unicode()
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string_form = Unicode()
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base_class = Unicode()
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length = Integer()
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file = Unicode()
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definition = Unicode()
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argspec = Dict()
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init_definition = Unicode()
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docstring = Unicode()
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init_docstring = Unicode()
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class_docstring = Unicode()
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call_def = Unicode()
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call_docstring = Unicode()
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source = Unicode()
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def check(self, d):
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for tst in Reference.check(self, d):
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yield tst
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if d['argspec'] is not None:
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for tst in ArgSpec().check(d['argspec']):
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yield tst
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class ArgSpec(Reference):
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args = List(Unicode)
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varargs = Unicode()
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varkw = Unicode()
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defaults = List()
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class Status(Reference):
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execution_state = Enum((u'busy', u'idle', u'starting'))
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class CompleteReply(Reference):
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matches = List(Unicode)
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def Version(num, trait=Integer):
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return List(trait, default_value=[0] * num, minlen=num, maxlen=num)
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class KernelInfoReply(Reference):
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protocol_version = Version(2)
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ipython_version = Version(4, Any)
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language_version = Version(3)
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language = Unicode()
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def _ipython_version_changed(self, name, old, new):
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for v in new:
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nt.assert_true(
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isinstance(v, int) or isinstance(v, basestring),
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'expected int or string as version component, got {0!r}'
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.format(v))
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# IOPub messages
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class PyIn(Reference):
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code = Unicode()
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execution_count = Integer()
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PyErr = ExecuteReplyError
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class Stream(Reference):
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name = Enum((u'stdout', u'stderr'))
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data = Unicode()
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mime_pat = re.compile(r'\w+/\w+')
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class DisplayData(Reference):
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source = Unicode()
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metadata = Dict()
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data = Dict()
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def _data_changed(self, name, old, new):
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for k,v in new.iteritems():
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nt.assert_true(mime_pat.match(k))
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nt.assert_true(isinstance(v, basestring), "expected string data, got %r" % v)
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class PyOut(Reference):
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execution_count = Integer()
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data = Dict()
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def _data_changed(self, name, old, new):
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for k,v in new.iteritems():
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nt.assert_true(mime_pat.match(k))
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nt.assert_true(isinstance(v, basestring), "expected string data, got %r" % v)
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references = {
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'execute_reply' : ExecuteReply(),
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'object_info_reply' : OInfoReply(),
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'status' : Status(),
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'complete_reply' : CompleteReply(),
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'kernel_info_reply': KernelInfoReply(),
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'pyin' : PyIn(),
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'pyout' : PyOut(),
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'pyerr' : PyErr(),
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'stream' : Stream(),
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'display_data' : DisplayData(),
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}
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"""
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Specifications of `content` part of the reply messages.
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"""
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def validate_message(msg, msg_type=None, parent=None):
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"""validate a message
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This is a generator, and must be iterated through to actually
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trigger each test.
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If msg_type and/or parent are given, the msg_type and/or parent msg_id
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are compared with the given values.
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"""
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RMessage().check(msg)
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if msg_type:
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yield nt.assert_equal(msg['msg_type'], msg_type)
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if parent:
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yield nt.assert_equal(msg['parent_header']['msg_id'], parent)
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content = msg['content']
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ref = references[msg['msg_type']]
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for tst in ref.check(content):
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yield tst
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#-----------------------------------------------------------------------------
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# Tests
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#-----------------------------------------------------------------------------
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# Shell channel
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@dec.parametric
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def test_execute():
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flush_channels()
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msg_id = KC.execute(code='x=1')
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'execute_reply', msg_id):
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yield tst
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@dec.parametric
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def test_execute_silent():
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flush_channels()
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msg_id, reply = execute(code='x=1', silent=True)
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# flush status=idle
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status = KC.iopub_channel.get_msg(timeout=2)
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for tst in validate_message(status, 'status', msg_id):
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yield tst
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nt.assert_equal(status['content']['execution_state'], 'idle')
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yield nt.assert_raises(Empty, KC.iopub_channel.get_msg, timeout=0.1)
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count = reply['execution_count']
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msg_id, reply = execute(code='x=2', silent=True)
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# flush status=idle
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status = KC.iopub_channel.get_msg(timeout=2)
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for tst in validate_message(status, 'status', msg_id):
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yield tst
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yield nt.assert_equal(status['content']['execution_state'], 'idle')
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yield nt.assert_raises(Empty, KC.iopub_channel.get_msg, timeout=0.1)
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count_2 = reply['execution_count']
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yield nt.assert_equal(count_2, count)
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@dec.parametric
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def test_execute_error():
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flush_channels()
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msg_id, reply = execute(code='1/0')
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yield nt.assert_equal(reply['status'], 'error')
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yield nt.assert_equal(reply['ename'], 'ZeroDivisionError')
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pyerr = KC.iopub_channel.get_msg(timeout=2)
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for tst in validate_message(pyerr, 'pyerr', msg_id):
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yield tst
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def test_execute_inc():
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"""execute request should increment execution_count"""
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flush_channels()
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msg_id, reply = execute(code='x=1')
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count = reply['execution_count']
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flush_channels()
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msg_id, reply = execute(code='x=2')
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count_2 = reply['execution_count']
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nt.assert_equal(count_2, count+1)
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def test_user_variables():
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flush_channels()
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msg_id, reply = execute(code='x=1', user_variables=['x'])
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user_variables = reply['user_variables']
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nt.assert_equal(user_variables, {u'x' : u'1'})
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def test_user_expressions():
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flush_channels()
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msg_id, reply = execute(code='x=1', user_expressions=dict(foo='x+1'))
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user_expressions = reply['user_expressions']
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nt.assert_equal(user_expressions, {u'foo' : u'2'})
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@dec.parametric
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def test_oinfo():
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flush_channels()
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msg_id = KC.object_info('a')
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'object_info_reply', msg_id):
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yield tst
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@dec.parametric
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def test_oinfo_found():
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flush_channels()
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msg_id, reply = execute(code='a=5')
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msg_id = KC.object_info('a')
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'object_info_reply', msg_id):
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yield tst
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content = reply['content']
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yield nt.assert_true(content['found'])
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argspec = content['argspec']
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yield nt.assert_true(argspec is None, "didn't expect argspec dict, got %r" % argspec)
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@dec.parametric
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def test_oinfo_detail():
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flush_channels()
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msg_id, reply = execute(code='ip=get_ipython()')
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msg_id = KC.object_info('ip.object_inspect', detail_level=2)
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'object_info_reply', msg_id):
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yield tst
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content = reply['content']
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yield nt.assert_true(content['found'])
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argspec = content['argspec']
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yield nt.assert_true(isinstance(argspec, dict), "expected non-empty argspec dict, got %r" % argspec)
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yield nt.assert_equal(argspec['defaults'], [0])
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@dec.parametric
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def test_oinfo_not_found():
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flush_channels()
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msg_id = KC.object_info('dne')
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'object_info_reply', msg_id):
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yield tst
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content = reply['content']
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yield nt.assert_false(content['found'])
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@dec.parametric
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def test_complete():
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flush_channels()
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msg_id, reply = execute(code="alpha = albert = 5")
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msg_id = KC.complete('al', 'al', 2)
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'complete_reply', msg_id):
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yield tst
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matches = reply['content']['matches']
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for name in ('alpha', 'albert'):
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yield nt.assert_true(name in matches, "Missing match: %r" % name)
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@dec.parametric
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def test_kernel_info_request():
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flush_channels()
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msg_id = KC.kernel_info()
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reply = KC.get_shell_msg(timeout=2)
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for tst in validate_message(reply, 'kernel_info_reply', msg_id):
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yield tst
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# IOPub channel
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@dec.parametric
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def test_stream():
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flush_channels()
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msg_id, reply = execute("print('hi')")
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stdout = KC.iopub_channel.get_msg(timeout=2)
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for tst in validate_message(stdout, 'stream', msg_id):
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yield tst
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content = stdout['content']
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yield nt.assert_equal(content['name'], u'stdout')
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yield nt.assert_equal(content['data'], u'hi\n')
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@dec.parametric
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def test_display_data():
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flush_channels()
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msg_id, reply = execute("from IPython.core.display import display; display(1)")
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display = KC.iopub_channel.get_msg(timeout=2)
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for tst in validate_message(display, 'display_data', parent=msg_id):
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yield tst
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data = display['content']['data']
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yield nt.assert_equal(data['text/plain'], u'1')
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