|
|
"""Global IPython app to support test running.
|
|
|
|
|
|
We must start our own ipython object and heavily muck with it so that all the
|
|
|
modifications IPython makes to system behavior don't send the doctest machinery
|
|
|
into a fit. This code should be considered a gross hack, but it gets the job
|
|
|
done.
|
|
|
"""
|
|
|
|
|
|
# Copyright (c) IPython Development Team.
|
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
|
|
import sys
|
|
|
import warnings
|
|
|
|
|
|
from . import tools
|
|
|
|
|
|
from IPython.core import page
|
|
|
from IPython.utils import io
|
|
|
from IPython.utils import py3compat
|
|
|
from IPython.utils.py3compat import builtin_mod
|
|
|
from IPython.terminal.interactiveshell import TerminalInteractiveShell
|
|
|
|
|
|
|
|
|
class StreamProxy(io.IOStream):
|
|
|
"""Proxy for sys.stdout/err. This will request the stream *at call time*
|
|
|
allowing for nose's Capture plugin's redirection of sys.stdout/err.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
name : str
|
|
|
The name of the stream. This will be requested anew at every call
|
|
|
"""
|
|
|
|
|
|
def __init__(self, name):
|
|
|
warnings.warn("StreamProxy is deprecated and unused as of IPython 5", DeprecationWarning,
|
|
|
stacklevel=2,
|
|
|
)
|
|
|
self.name=name
|
|
|
|
|
|
@property
|
|
|
def stream(self):
|
|
|
return getattr(sys, self.name)
|
|
|
|
|
|
def flush(self):
|
|
|
self.stream.flush()
|
|
|
|
|
|
|
|
|
def get_ipython():
|
|
|
# This will get replaced by the real thing once we start IPython below
|
|
|
return start_ipython()
|
|
|
|
|
|
|
|
|
# A couple of methods to override those in the running IPython to interact
|
|
|
# better with doctest (doctest captures on raw stdout, so we need to direct
|
|
|
# various types of output there otherwise it will miss them).
|
|
|
|
|
|
def xsys(self, cmd):
|
|
|
"""Replace the default system call with a capturing one for doctest.
|
|
|
"""
|
|
|
# We use getoutput, but we need to strip it because pexpect captures
|
|
|
# the trailing newline differently from commands.getoutput
|
|
|
print(self.getoutput(cmd, split=False, depth=1).rstrip(), end='', file=sys.stdout)
|
|
|
sys.stdout.flush()
|
|
|
|
|
|
|
|
|
def _showtraceback(self, etype, evalue, stb):
|
|
|
"""Print the traceback purely on stdout for doctest to capture it.
|
|
|
"""
|
|
|
print(self.InteractiveTB.stb2text(stb), file=sys.stdout)
|
|
|
|
|
|
|
|
|
def start_ipython():
|
|
|
"""Start a global IPython shell, which we need for IPython-specific syntax.
|
|
|
"""
|
|
|
global get_ipython
|
|
|
|
|
|
# This function should only ever run once!
|
|
|
if hasattr(start_ipython, 'already_called'):
|
|
|
return
|
|
|
start_ipython.already_called = True
|
|
|
|
|
|
# Store certain global objects that IPython modifies
|
|
|
_displayhook = sys.displayhook
|
|
|
_excepthook = sys.excepthook
|
|
|
_main = sys.modules.get('__main__')
|
|
|
|
|
|
# Create custom argv and namespaces for our IPython to be test-friendly
|
|
|
config = tools.default_config()
|
|
|
config.TerminalInteractiveShell.simple_prompt = True
|
|
|
|
|
|
# Create and initialize our test-friendly IPython instance.
|
|
|
shell = TerminalInteractiveShell.instance(config=config,
|
|
|
)
|
|
|
|
|
|
# A few more tweaks needed for playing nicely with doctests...
|
|
|
|
|
|
# remove history file
|
|
|
shell.tempfiles.append(config.HistoryManager.hist_file)
|
|
|
|
|
|
# These traps are normally only active for interactive use, set them
|
|
|
# permanently since we'll be mocking interactive sessions.
|
|
|
shell.builtin_trap.activate()
|
|
|
|
|
|
# Modify the IPython system call with one that uses getoutput, so that we
|
|
|
# can capture subcommands and print them to Python's stdout, otherwise the
|
|
|
# doctest machinery would miss them.
|
|
|
shell.system = py3compat.MethodType(xsys, shell)
|
|
|
|
|
|
shell._showtraceback = py3compat.MethodType(_showtraceback, shell)
|
|
|
|
|
|
# IPython is ready, now clean up some global state...
|
|
|
|
|
|
# Deactivate the various python system hooks added by ipython for
|
|
|
# interactive convenience so we don't confuse the doctest system
|
|
|
sys.modules['__main__'] = _main
|
|
|
sys.displayhook = _displayhook
|
|
|
sys.excepthook = _excepthook
|
|
|
|
|
|
# So that ipython magics and aliases can be doctested (they work by making
|
|
|
# a call into a global _ip object). Also make the top-level get_ipython
|
|
|
# now return this without recursively calling here again.
|
|
|
_ip = shell
|
|
|
get_ipython = _ip.get_ipython
|
|
|
builtin_mod._ip = _ip
|
|
|
builtin_mod.get_ipython = get_ipython
|
|
|
|
|
|
# Override paging, so we don't require user interaction during the tests.
|
|
|
def nopage(strng, start=0, screen_lines=0, pager_cmd=None):
|
|
|
if isinstance(strng, dict):
|
|
|
strng = strng.get('text/plain', '')
|
|
|
print(strng)
|
|
|
|
|
|
page.orig_page = page.pager_page
|
|
|
page.pager_page = nopage
|
|
|
|
|
|
return _ip
|
|
|
|
