first commit

.venv/Lib/site-packages/IPython/testing/__init__.py

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+"""Testing support (tools to test IPython itself).
+"""
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2009-2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+
+import os
+
+#-----------------------------------------------------------------------------
+# Constants
+#-----------------------------------------------------------------------------
+
+# We scale all timeouts via this factor, slow machines can increase it
+IPYTHON_TESTING_TIMEOUT_SCALE = float(os.getenv(
+                                    'IPYTHON_TESTING_TIMEOUT_SCALE', 1))

.venv/Lib/site-packages/IPython/testing/decorators.py

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+# -*- coding: utf-8 -*-
+"""Decorators for labeling test objects.
+
+Decorators that merely return a modified version of the original function
+object are straightforward.  Decorators that return a new function object need
+to use nose.tools.make_decorator(original_function)(decorator) in returning the
+decorator, in order to preserve metadata such as function name, setup and
+teardown functions and so on - see nose.tools for more information.
+
+This module provides a set of useful decorators meant to be ready to use in
+your own tests.  See the bottom of the file for the ready-made ones, and if you
+find yourself writing a new one that may be of generic use, add it here.
+
+Included decorators:
+
+
+Lightweight testing that remains unittest-compatible.
+
+- An @as_unittest decorator can be used to tag any normal parameter-less
+  function as a unittest TestCase.  Then, both nose and normal unittest will
+  recognize it as such.  This will make it easier to migrate away from Nose if
+  we ever need/want to while maintaining very lightweight tests.
+
+NOTE: This file contains IPython-specific decorators. Using the machinery in
+IPython.external.decorators, we import either numpy.testing.decorators if numpy is
+available, OR use equivalent code in IPython.external._decorators, which
+we've copied verbatim from numpy.
+
+"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import os
+import shutil
+import sys
+import tempfile
+import unittest
+import warnings
+from importlib import import_module
+
+from decorator import decorator
+
+# Expose the unittest-driven decorators
+from .ipunittest import ipdoctest, ipdocstring
+
+#-----------------------------------------------------------------------------
+# Classes and functions
+#-----------------------------------------------------------------------------
+
+# Simple example of the basic idea
+def as_unittest(func):
+    """Decorator to make a simple function into a normal test via unittest."""
+    class Tester(unittest.TestCase):
+        def test(self):
+            func()
+
+    Tester.__name__ = func.__name__
+
+    return Tester
+
+# Utility functions
+
+
+def skipif(skip_condition, msg=None):
+    """Make function raise SkipTest exception if skip_condition is true
+
+    Parameters
+    ----------
+
+    skip_condition : bool or callable
+      Flag to determine whether to skip test. If the condition is a
+      callable, it is used at runtime to dynamically make the decision. This
+      is useful for tests that may require costly imports, to delay the cost
+      until the test suite is actually executed.
+    msg : string
+      Message to give on raising a SkipTest exception.
+
+    Returns
+    -------
+    decorator : function
+      Decorator, which, when applied to a function, causes SkipTest
+      to be raised when the skip_condition was True, and the function
+      to be called normally otherwise.
+    """
+    if msg is None:
+        msg = "Test skipped due to test condition."
+
+    import pytest
+
+    assert isinstance(skip_condition, bool)
+    return pytest.mark.skipif(skip_condition, reason=msg)
+
+
+# A version with the condition set to true, common case just to attach a message
+# to a skip decorator
+def skip(msg=None):
+    """Decorator factory - mark a test function for skipping from test suite.
+
+    Parameters
+    ----------
+      msg : string
+        Optional message to be added.
+
+    Returns
+    -------
+       decorator : function
+         Decorator, which, when applied to a function, causes SkipTest
+         to be raised, with the optional message added.
+      """
+    if msg and not isinstance(msg, str):
+        raise ValueError('invalid object passed to `@skip` decorator, did you '
+                         'meant `@skip()` with brackets ?')
+    return skipif(True, msg)
+
+
+def onlyif(condition, msg):
+    """The reverse from skipif, see skipif for details."""
+
+    return skipif(not condition, msg)
+
+#-----------------------------------------------------------------------------
+# Utility functions for decorators
+def module_not_available(module):
+    """Can module be imported?  Returns true if module does NOT import.
+
+    This is used to make a decorator to skip tests that require module to be
+    available, but delay the 'import numpy' to test execution time.
+    """
+    try:
+        mod = import_module(module)
+        mod_not_avail = False
+    except ImportError:
+        mod_not_avail = True
+
+    return mod_not_avail
+
+
+#-----------------------------------------------------------------------------
+# Decorators for public use
+
+# Decorators to skip certain tests on specific platforms.
+skip_win32 = skipif(sys.platform == 'win32',
+                    "This test does not run under Windows")
+skip_linux = skipif(sys.platform.startswith('linux'),
+                    "This test does not run under Linux")
+skip_osx = skipif(sys.platform == 'darwin',"This test does not run under OS X")
+
+
+# Decorators to skip tests if not on specific platforms.
+skip_if_not_win32 = skipif(sys.platform != 'win32',
+                           "This test only runs under Windows")
+skip_if_not_linux = skipif(not sys.platform.startswith('linux'),
+                           "This test only runs under Linux")
+
+_x11_skip_cond = (sys.platform not in ('darwin', 'win32') and
+                  os.environ.get('DISPLAY', '') == '')
+_x11_skip_msg = "Skipped under *nix when X11/XOrg not available"
+
+skip_if_no_x11 = skipif(_x11_skip_cond, _x11_skip_msg)
+
+# Other skip decorators
+
+# generic skip without module
+skip_without = lambda mod: skipif(module_not_available(mod), "This test requires %s" % mod)
+
+skipif_not_numpy = skip_without('numpy')
+
+skipif_not_matplotlib = skip_without('matplotlib')
+
+# A null 'decorator', useful to make more readable code that needs to pick
+# between different decorators based on OS or other conditions
+null_deco = lambda f: f
+
+# Some tests only run where we can use unicode paths. Note that we can't just
+# check os.path.supports_unicode_filenames, which is always False on Linux.
+try:
+    f = tempfile.NamedTemporaryFile(prefix=u"tmp€")
+except UnicodeEncodeError:
+    unicode_paths = False
+else:
+    unicode_paths = True
+    f.close()
+
+onlyif_unicode_paths = onlyif(unicode_paths, ("This test is only applicable "
+                                    "where we can use unicode in filenames."))
+
+
+def onlyif_cmds_exist(*commands):
+    """
+    Decorator to skip test when at least one of `commands` is not found.
+    """
+    assert (
+        os.environ.get("IPTEST_WORKING_DIR", None) is None
+    ), "iptest deprecated since IPython 8.0"
+    for cmd in commands:
+        reason = f"This test runs only if command '{cmd}' is installed"
+        if not shutil.which(cmd):
+            import pytest
+
+            return pytest.mark.skip(reason=reason)
+    return null_deco

.venv/Lib/site-packages/IPython/testing/globalipapp.py

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+"""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 builtins as builtin_mod
+import sys
+import types
+import warnings
+
+from pathlib import Path
+
+from . import tools
+
+from IPython.core import page
+from IPython.utils import io
+from IPython.terminal.interactiveshell import TerminalInteractiveShell
+
+
+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(Path(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 = types.MethodType(xsys, shell)
+
+    shell._showtraceback = types.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.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

.venv/Lib/site-packages/IPython/testing/ipunittest.py

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+"""Experimental code for cleaner support of IPython syntax with unittest.
+
+In IPython up until 0.10, we've used very hacked up nose machinery for running
+tests with IPython special syntax, and this has proved to be extremely slow.
+This module provides decorators to try a different approach, stemming from a
+conversation Brian and I (FP) had about this problem Sept/09.
+
+The goal is to be able to easily write simple functions that can be seen by
+unittest as tests, and ultimately for these to support doctests with full
+IPython syntax.  Nose already offers this based on naming conventions and our
+hackish plugins, but we are seeking to move away from nose dependencies if
+possible.
+
+This module follows a different approach, based on decorators.
+
+- A decorator called @ipdoctest can mark any function as having a docstring
+  that should be viewed as a doctest, but after syntax conversion.
+
+Authors
+-------
+
+- Fernando Perez <Fernando.Perez@berkeley.edu>
+"""
+
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2009-2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+# Stdlib
+import re
+import unittest
+from doctest import DocTestFinder, DocTestRunner, TestResults
+from IPython.terminal.interactiveshell import InteractiveShell
+
+#-----------------------------------------------------------------------------
+# Classes and functions
+#-----------------------------------------------------------------------------
+
+def count_failures(runner):
+    """Count number of failures in a doctest runner.
+
+    Code modeled after the summarize() method in doctest.
+    """
+    return [TestResults(f, t) for f, t in runner._name2ft.values() if f > 0 ]
+
+
+class IPython2PythonConverter(object):
+    """Convert IPython 'syntax' to valid Python.
+
+    Eventually this code may grow to be the full IPython syntax conversion
+    implementation, but for now it only does prompt conversion."""
+    
+    def __init__(self):
+        self.rps1 = re.compile(r'In\ \[\d+\]: ')
+        self.rps2 = re.compile(r'\ \ \ \.\.\.+: ')
+        self.rout = re.compile(r'Out\[\d+\]: \s*?\n?')
+        self.pyps1 = '>>> '
+        self.pyps2 = '... '
+        self.rpyps1 = re.compile (r'(\s*%s)(.*)$' % self.pyps1)
+        self.rpyps2 = re.compile (r'(\s*%s)(.*)$' % self.pyps2)
+
+    def __call__(self, ds):
+        """Convert IPython prompts to python ones in a string."""
+        from . import globalipapp
+
+        pyps1 = '>>> '
+        pyps2 = '... '
+        pyout = ''
+
+        dnew = ds
+        dnew = self.rps1.sub(pyps1, dnew)
+        dnew = self.rps2.sub(pyps2, dnew)
+        dnew = self.rout.sub(pyout, dnew)
+        ip = InteractiveShell.instance()
+
+        # Convert input IPython source into valid Python.
+        out = []
+        newline = out.append
+        for line in dnew.splitlines():
+
+            mps1 = self.rpyps1.match(line)
+            if mps1 is not None:
+                prompt, text = mps1.groups()
+                newline(prompt+ip.prefilter(text, False))
+                continue
+
+            mps2 = self.rpyps2.match(line)
+            if mps2 is not None:
+                prompt, text = mps2.groups()
+                newline(prompt+ip.prefilter(text, True))
+                continue
+            
+            newline(line)
+        newline('')  # ensure a closing newline, needed by doctest
+        #print "PYSRC:", '\n'.join(out)  # dbg
+        return '\n'.join(out)
+
+    #return dnew
+
+
+class Doc2UnitTester(object):
+    """Class whose instances act as a decorator for docstring testing.
+
+    In practice we're only likely to need one instance ever, made below (though
+    no attempt is made at turning it into a singleton, there is no need for
+    that).
+    """
+    def __init__(self, verbose=False):
+        """New decorator.
+
+        Parameters
+        ----------
+
+        verbose : boolean, optional (False)
+          Passed to the doctest finder and runner to control verbosity.
+        """
+        self.verbose = verbose
+        # We can reuse the same finder for all instances
+        self.finder = DocTestFinder(verbose=verbose, recurse=False)
+
+    def __call__(self, func):
+        """Use as a decorator: doctest a function's docstring as a unittest.
+        
+        This version runs normal doctests, but the idea is to make it later run
+        ipython syntax instead."""
+
+        # Capture the enclosing instance with a different name, so the new
+        # class below can see it without confusion regarding its own 'self'
+        # that will point to the test instance at runtime
+        d2u = self
+
+        # Rewrite the function's docstring to have python syntax
+        if func.__doc__ is not None:
+            func.__doc__ = ip2py(func.__doc__)
+
+        # Now, create a tester object that is a real unittest instance, so
+        # normal unittest machinery (or Nose, or Trial) can find it.
+        class Tester(unittest.TestCase):
+            def test(self):
+                # Make a new runner per function to be tested
+                runner = DocTestRunner(verbose=d2u.verbose)
+                for the_test in d2u.finder.find(func, func.__name__):
+                    runner.run(the_test)
+                failed = count_failures(runner)
+                if failed:
+                    # Since we only looked at a single function's docstring,
+                    # failed should contain at most one item.  More than that
+                    # is a case we can't handle and should error out on
+                    if len(failed) > 1:
+                        err = "Invalid number of test results: %s" % failed
+                        raise ValueError(err)
+                    # Report a normal failure.
+                    self.fail('failed doctests: %s' % str(failed[0]))
+                    
+        # Rename it so test reports have the original signature.
+        Tester.__name__ = func.__name__
+        return Tester
+
+
+def ipdocstring(func):
+    """Change the function docstring via ip2py.
+    """
+    if func.__doc__ is not None:
+        func.__doc__ = ip2py(func.__doc__)
+    return func
+
+        
+# Make an instance of the classes for public use
+ipdoctest = Doc2UnitTester()
+ip2py = IPython2PythonConverter()

.venv/Lib/site-packages/IPython/testing/plugin/README.txt

@@ -0,0 +1,34 @@
+=======================================================
+ Nose plugin with IPython and extension module support
+=======================================================
+
+This directory provides the key functionality for test support that IPython
+needs as a nose plugin, which can be installed for use in projects other than
+IPython.
+
+The presence of a Makefile here is mostly for development and debugging
+purposes as it only provides a few shorthand commands.  You can manually
+install the plugin by using standard Python procedures (``setup.py install``
+with appropriate arguments).
+
+To install the plugin using the Makefile, edit its first line to reflect where
+you'd like the installation.
+
+Once you've set the prefix, simply build/install the plugin with::
+
+  make
+
+and run the tests with::
+
+  make test
+
+You should see output similar to::
+
+  maqroll[plugin]> make test
+  nosetests -s --with-ipdoctest --doctest-tests dtexample.py
+  ..
+  ----------------------------------------------------------------------
+  Ran 2 tests in 0.016s
+
+  OK
+

.venv/Lib/site-packages/IPython/testing/plugin/dtexample.py

@@ -0,0 +1,167 @@
+"""Simple example using doctests.
+
+This file just contains doctests both using plain python and IPython prompts.
+All tests should be loaded by nose.
+"""
+
+import os
+
+
+def pyfunc():
+    """Some pure python tests...
+
+    >>> pyfunc()
+    'pyfunc'
+
+    >>> import os
+
+    >>> 2+3
+    5
+
+    >>> for i in range(3):
+    ...     print(i, end=' ')
+    ...     print(i+1, end=' ')
+    ...
+    0 1 1 2 2 3 
+    """
+    return 'pyfunc'
+
+def ipfunc():
+    """Some ipython tests...
+
+    In [1]: import os
+
+    In [3]: 2+3
+    Out[3]: 5
+
+    In [26]: for i in range(3):
+       ....:     print(i, end=' ')
+       ....:     print(i+1, end=' ')
+       ....:
+    0 1 1 2 2 3
+
+
+    It's OK to use '_' for the last result, but do NOT try to use IPython's
+    numbered history of _NN outputs, since those won't exist under the
+    doctest environment:
+
+    In [7]: 'hi'
+    Out[7]: 'hi'
+
+    In [8]: print(repr(_))
+    'hi'
+
+    In [7]: 3+4
+    Out[7]: 7
+
+    In [8]: _+3
+    Out[8]: 10
+
+    In [9]: ipfunc()
+    Out[9]: 'ipfunc'
+    """
+    return "ipfunc"
+
+
+def ipos():
+    """Examples that access the operating system work:
+
+    In [1]: !echo hello
+    hello
+
+    In [2]: !echo hello > /tmp/foo_iptest
+
+    In [3]: !cat /tmp/foo_iptest
+    hello
+
+    In [4]: rm -f /tmp/foo_iptest
+    """
+    pass
+
+
+ipos.__skip_doctest__ = os.name == "nt"
+
+
+def ranfunc():
+    """A function with some random output.
+
+       Normal examples are verified as usual:
+       >>> 1+3
+       4
+
+       But if you put '# random' in the output, it is ignored:
+       >>> 1+3
+       junk goes here...  # random
+
+       >>> 1+2
+       again,  anything goes #random
+       if multiline, the random mark is only needed once.
+
+       >>> 1+2
+       You can also put the random marker at the end:
+       # random
+
+       >>> 1+2
+       # random
+       .. or at the beginning.
+
+       More correct input is properly verified:
+       >>> ranfunc()
+       'ranfunc'
+    """
+    return 'ranfunc'
+
+
+def random_all():
+    """A function where we ignore the output of ALL examples.
+
+    Examples:
+
+      # all-random
+
+      This mark tells the testing machinery that all subsequent examples should
+      be treated as random (ignoring their output).  They are still executed,
+      so if a they raise an error, it will be detected as such, but their
+      output is completely ignored.
+
+      >>> 1+3
+      junk goes here...
+
+      >>> 1+3
+      klasdfj;
+
+      >>> 1+2
+      again,  anything goes
+      blah...
+    """
+    pass
+
+def iprand():
+    """Some ipython tests with random output.
+
+    In [7]: 3+4
+    Out[7]: 7
+
+    In [8]: print('hello')
+    world  # random
+
+    In [9]: iprand()
+    Out[9]: 'iprand'
+    """
+    return 'iprand'
+
+def iprand_all():
+    """Some ipython tests with fully random output.
+
+    # all-random
+    
+    In [7]: 1
+    Out[7]: 99
+
+    In [8]: print('hello')
+    world
+
+    In [9]: iprand_all()
+    Out[9]: 'junk'
+    """
+    return 'iprand_all'

.venv/Lib/site-packages/IPython/testing/plugin/ipdoctest.py

@@ -0,0 +1,300 @@
+"""Nose Plugin that supports IPython doctests.
+
+Limitations:
+
+- When generating examples for use as doctests, make sure that you have
+  pretty-printing OFF.  This can be done either by setting the
+  ``PlainTextFormatter.pprint`` option in your configuration file to  False, or
+  by interactively disabling it with  %Pprint.  This is required so that IPython
+  output matches that of normal Python, which is used by doctest for internal
+  execution.
+
+- Do not rely on specific prompt numbers for results (such as using
+  '_34==True', for example).  For IPython tests run via an external process the
+  prompt numbers may be different, and IPython tests run as normal python code
+  won't even have these special _NN variables set at all.
+"""
+
+#-----------------------------------------------------------------------------
+# Module imports
+
+# From the standard library
+import doctest
+import logging
+import os
+import re
+
+from testpath import modified_env
+
+#-----------------------------------------------------------------------------
+# Module globals and other constants
+#-----------------------------------------------------------------------------
+
+log = logging.getLogger(__name__)
+
+
+#-----------------------------------------------------------------------------
+# Classes and functions
+#-----------------------------------------------------------------------------
+
+
+class DocTestFinder(doctest.DocTestFinder):
+    def _get_test(self, obj, name, module, globs, source_lines):
+        test = super()._get_test(obj, name, module, globs, source_lines)
+
+        if bool(getattr(obj, "__skip_doctest__", False)) and test is not None:
+            for example in test.examples:
+                example.options[doctest.SKIP] = True
+
+        return test
+
+
+class IPDoctestOutputChecker(doctest.OutputChecker):
+    """Second-chance checker with support for random tests.
+
+    If the default comparison doesn't pass, this checker looks in the expected
+    output string for flags that tell us to ignore the output.
+    """
+
+    random_re = re.compile(r'#\s*random\s+')
+
+    def check_output(self, want, got, optionflags):
+        """Check output, accepting special markers embedded in the output.
+
+        If the output didn't pass the default validation but the special string
+        '#random' is included, we accept it."""
+
+        # Let the original tester verify first, in case people have valid tests
+        # that happen to have a comment saying '#random' embedded in.
+        ret = doctest.OutputChecker.check_output(self, want, got,
+                                                 optionflags)
+        if not ret and self.random_re.search(want):
+            #print >> sys.stderr, 'RANDOM OK:',want  # dbg
+            return True
+
+        return ret
+
+
+# A simple subclassing of the original with a different class name, so we can
+# distinguish and treat differently IPython examples from pure python ones.
+class IPExample(doctest.Example): pass
+
+
+class IPDocTestParser(doctest.DocTestParser):
+    """
+    A class used to parse strings containing doctest examples.
+
+    Note: This is a version modified to properly recognize IPython input and
+    convert any IPython examples into valid Python ones.
+    """
+    # This regular expression is used to find doctest examples in a
+    # string.  It defines three groups: `source` is the source code
+    # (including leading indentation and prompts); `indent` is the
+    # indentation of the first (PS1) line of the source code; and
+    # `want` is the expected output (including leading indentation).
+
+    # Classic Python prompts or default IPython ones
+    _PS1_PY = r'>>>'
+    _PS2_PY = r'\.\.\.'
+
+    _PS1_IP = r'In\ \[\d+\]:'
+    _PS2_IP = r'\ \ \ \.\.\.+:'
+
+    _RE_TPL = r'''
+        # Source consists of a PS1 line followed by zero or more PS2 lines.
+        (?P<source>
+            (?:^(?P<indent> [ ]*) (?P<ps1> %s) .*)    # PS1 line
+            (?:\n           [ ]*  (?P<ps2> %s) .*)*)  # PS2 lines
+        \n? # a newline
+        # Want consists of any non-blank lines that do not start with PS1.
+        (?P<want> (?:(?![ ]*$)    # Not a blank line
+                     (?![ ]*%s)   # Not a line starting with PS1
+                     (?![ ]*%s)   # Not a line starting with PS2
+                     .*$\n?       # But any other line
+                  )*)
+                  '''
+
+    _EXAMPLE_RE_PY = re.compile( _RE_TPL % (_PS1_PY,_PS2_PY,_PS1_PY,_PS2_PY),
+                                 re.MULTILINE | re.VERBOSE)
+
+    _EXAMPLE_RE_IP = re.compile( _RE_TPL % (_PS1_IP,_PS2_IP,_PS1_IP,_PS2_IP),
+                                 re.MULTILINE | re.VERBOSE)
+
+    # Mark a test as being fully random.  In this case, we simply append the
+    # random marker ('#random') to each individual example's output.  This way
+    # we don't need to modify any other code.
+    _RANDOM_TEST = re.compile(r'#\s*all-random\s+')
+
+    def ip2py(self,source):
+        """Convert input IPython source into valid Python."""
+        block = _ip.input_transformer_manager.transform_cell(source)
+        if len(block.splitlines()) == 1:
+            return _ip.prefilter(block)
+        else:
+            return block
+
+    def parse(self, string, name='<string>'):
+        """
+        Divide the given string into examples and intervening text,
+        and return them as a list of alternating Examples and strings.
+        Line numbers for the Examples are 0-based.  The optional
+        argument `name` is a name identifying this string, and is only
+        used for error messages.
+        """
+
+        #print 'Parse string:\n',string # dbg
+
+        string = string.expandtabs()
+        # If all lines begin with the same indentation, then strip it.
+        min_indent = self._min_indent(string)
+        if min_indent > 0:
+            string = '\n'.join([l[min_indent:] for l in string.split('\n')])
+
+        output = []
+        charno, lineno = 0, 0
+
+        # We make 'all random' tests by adding the '# random' mark to every
+        # block of output in the test.
+        if self._RANDOM_TEST.search(string):
+            random_marker = '\n# random'
+        else:
+            random_marker = ''
+
+        # Whether to convert the input from ipython to python syntax
+        ip2py = False
+        # Find all doctest examples in the string.  First, try them as Python
+        # examples, then as IPython ones
+        terms = list(self._EXAMPLE_RE_PY.finditer(string))
+        if terms:
+            # Normal Python example
+            Example = doctest.Example
+        else:
+            # It's an ipython example.
+            terms = list(self._EXAMPLE_RE_IP.finditer(string))
+            Example = IPExample
+            ip2py = True
+
+        for m in terms:
+            # Add the pre-example text to `output`.
+            output.append(string[charno:m.start()])
+            # Update lineno (lines before this example)
+            lineno += string.count('\n', charno, m.start())
+            # Extract info from the regexp match.
+            (source, options, want, exc_msg) = \
+                     self._parse_example(m, name, lineno,ip2py)
+
+            # Append the random-output marker (it defaults to empty in most
+            # cases, it's only non-empty for 'all-random' tests):
+            want += random_marker
+
+            # Create an Example, and add it to the list.
+            if not self._IS_BLANK_OR_COMMENT(source):
+                output.append(Example(source, want, exc_msg,
+                                      lineno=lineno,
+                                      indent=min_indent+len(m.group('indent')),
+                                      options=options))
+            # Update lineno (lines inside this example)
+            lineno += string.count('\n', m.start(), m.end())
+            # Update charno.
+            charno = m.end()
+        # Add any remaining post-example text to `output`.
+        output.append(string[charno:])
+        return output
+
+    def _parse_example(self, m, name, lineno,ip2py=False):
+        """
+        Given a regular expression match from `_EXAMPLE_RE` (`m`),
+        return a pair `(source, want)`, where `source` is the matched
+        example's source code (with prompts and indentation stripped);
+        and `want` is the example's expected output (with indentation
+        stripped).
+
+        `name` is the string's name, and `lineno` is the line number
+        where the example starts; both are used for error messages.
+
+        Optional:
+        `ip2py`: if true, filter the input via IPython to convert the syntax
+        into valid python.
+        """
+
+        # Get the example's indentation level.
+        indent = len(m.group('indent'))
+
+        # Divide source into lines; check that they're properly
+        # indented; and then strip their indentation & prompts.
+        source_lines = m.group('source').split('\n')
+
+        # We're using variable-length input prompts
+        ps1 = m.group('ps1')
+        ps2 = m.group('ps2')
+        ps1_len = len(ps1)
+
+        self._check_prompt_blank(source_lines, indent, name, lineno,ps1_len)
+        if ps2:
+            self._check_prefix(source_lines[1:], ' '*indent + ps2, name, lineno)
+
+        source = '\n'.join([sl[indent+ps1_len+1:] for sl in source_lines])
+
+        if ip2py:
+            # Convert source input from IPython into valid Python syntax
+            source = self.ip2py(source)
+
+        # Divide want into lines; check that it's properly indented; and
+        # then strip the indentation.  Spaces before the last newline should
+        # be preserved, so plain rstrip() isn't good enough.
+        want = m.group('want')
+        want_lines = want.split('\n')
+        if len(want_lines) > 1 and re.match(r' *$', want_lines[-1]):
+            del want_lines[-1]  # forget final newline & spaces after it
+        self._check_prefix(want_lines, ' '*indent, name,
+                           lineno + len(source_lines))
+
+        # Remove ipython output prompt that might be present in the first line
+        want_lines[0] = re.sub(r'Out\[\d+\]: \s*?\n?','',want_lines[0])
+
+        want = '\n'.join([wl[indent:] for wl in want_lines])
+
+        # If `want` contains a traceback message, then extract it.
+        m = self._EXCEPTION_RE.match(want)
+        if m:
+            exc_msg = m.group('msg')
+        else:
+            exc_msg = None
+
+        # Extract options from the source.
+        options = self._find_options(source, name, lineno)
+
+        return source, options, want, exc_msg
+
+    def _check_prompt_blank(self, lines, indent, name, lineno, ps1_len):
+        """
+        Given the lines of a source string (including prompts and
+        leading indentation), check to make sure that every prompt is
+        followed by a space character.  If any line is not followed by
+        a space character, then raise ValueError.
+
+        Note: IPython-modified version which takes the input prompt length as a
+        parameter, so that prompts of variable length can be dealt with.
+        """
+        space_idx = indent+ps1_len
+        min_len = space_idx+1
+        for i, line in enumerate(lines):
+            if len(line) >=  min_len and line[space_idx] != ' ':
+                raise ValueError('line %r of the docstring for %s '
+                                 'lacks blank after %s: %r' %
+                                 (lineno+i+1, name,
+                                  line[indent:space_idx], line))
+
+
+SKIP = doctest.register_optionflag('SKIP')
+
+
+class IPDocTestRunner(doctest.DocTestRunner,object):
+    """Test runner that synchronizes the IPython namespace with test globals.
+    """
+
+    def run(self, test, compileflags=None, out=None, clear_globs=True):
+        # Override terminal size to standardise traceback format
+        with modified_env({'COLUMNS': '80', 'LINES': '24'}):
+            return super(IPDocTestRunner,self).run(test,
+                                                   compileflags,out,clear_globs)

.venv/Lib/site-packages/IPython/testing/plugin/pytest_ipdoctest.py

@@ -0,0 +1,860 @@
+# Based on Pytest doctest.py
+# Original license:
+# The MIT License (MIT)
+#
+# Copyright (c) 2004-2021 Holger Krekel and others
+"""Discover and run ipdoctests in modules and test files."""
+import builtins
+import bdb
+import inspect
+import os
+import platform
+import sys
+import traceback
+import types
+import warnings
+from contextlib import contextmanager
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import Generator
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import Pattern
+from typing import Sequence
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+import pytest
+from _pytest import outcomes
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import ReprFileLocation
+from _pytest._code.code import TerminalRepr
+from _pytest._io import TerminalWriter
+from _pytest.compat import safe_getattr
+from _pytest.config import Config
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import FixtureRequest
+from _pytest.nodes import Collector
+from _pytest.outcomes import OutcomeException
+from _pytest.pathlib import fnmatch_ex
+from _pytest.pathlib import import_path
+from _pytest.python_api import approx
+from _pytest.warning_types import PytestWarning
+
+if TYPE_CHECKING:
+    import doctest
+
+DOCTEST_REPORT_CHOICE_NONE = "none"
+DOCTEST_REPORT_CHOICE_CDIFF = "cdiff"
+DOCTEST_REPORT_CHOICE_NDIFF = "ndiff"
+DOCTEST_REPORT_CHOICE_UDIFF = "udiff"
+DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE = "only_first_failure"
+
+DOCTEST_REPORT_CHOICES = (
+    DOCTEST_REPORT_CHOICE_NONE,
+    DOCTEST_REPORT_CHOICE_CDIFF,
+    DOCTEST_REPORT_CHOICE_NDIFF,
+    DOCTEST_REPORT_CHOICE_UDIFF,
+    DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE,
+)
+
+# Lazy definition of runner class
+RUNNER_CLASS = None
+# Lazy definition of output checker class
+CHECKER_CLASS: Optional[Type["IPDoctestOutputChecker"]] = None
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini(
+        "ipdoctest_optionflags",
+        "option flags for ipdoctests",
+        type="args",
+        default=["ELLIPSIS"],
+    )
+    parser.addini(
+        "ipdoctest_encoding", "encoding used for ipdoctest files", default="utf-8"
+    )
+    group = parser.getgroup("collect")
+    group.addoption(
+        "--ipdoctest-modules",
+        action="store_true",
+        default=False,
+        help="run ipdoctests in all .py modules",
+        dest="ipdoctestmodules",
+    )
+    group.addoption(
+        "--ipdoctest-report",
+        type=str.lower,
+        default="udiff",
+        help="choose another output format for diffs on ipdoctest failure",
+        choices=DOCTEST_REPORT_CHOICES,
+        dest="ipdoctestreport",
+    )
+    group.addoption(
+        "--ipdoctest-glob",
+        action="append",
+        default=[],
+        metavar="pat",
+        help="ipdoctests file matching pattern, default: test*.txt",
+        dest="ipdoctestglob",
+    )
+    group.addoption(
+        "--ipdoctest-ignore-import-errors",
+        action="store_true",
+        default=False,
+        help="ignore ipdoctest ImportErrors",
+        dest="ipdoctest_ignore_import_errors",
+    )
+    group.addoption(
+        "--ipdoctest-continue-on-failure",
+        action="store_true",
+        default=False,
+        help="for a given ipdoctest, continue to run after the first failure",
+        dest="ipdoctest_continue_on_failure",
+    )
+
+
+def pytest_unconfigure() -> None:
+    global RUNNER_CLASS
+
+    RUNNER_CLASS = None
+
+
+def pytest_collect_file(
+    file_path: Path,
+    parent: Collector,
+) -> Optional[Union["IPDoctestModule", "IPDoctestTextfile"]]:
+    config = parent.config
+    if file_path.suffix == ".py":
+        if config.option.ipdoctestmodules and not any(
+            (_is_setup_py(file_path), _is_main_py(file_path))
+        ):
+            mod: IPDoctestModule = IPDoctestModule.from_parent(parent, path=file_path)
+            return mod
+    elif _is_ipdoctest(config, file_path, parent):
+        txt: IPDoctestTextfile = IPDoctestTextfile.from_parent(parent, path=file_path)
+        return txt
+    return None
+
+
+if int(pytest.__version__.split(".")[0]) < 7:
+    _collect_file = pytest_collect_file
+
+    def pytest_collect_file(
+        path,
+        parent: Collector,
+    ) -> Optional[Union["IPDoctestModule", "IPDoctestTextfile"]]:
+        return _collect_file(Path(path), parent)
+
+    _import_path = import_path
+
+    def import_path(path, root):
+        import py.path
+
+        return _import_path(py.path.local(path))
+
+
+def _is_setup_py(path: Path) -> bool:
+    if path.name != "setup.py":
+        return False
+    contents = path.read_bytes()
+    return b"setuptools" in contents or b"distutils" in contents
+
+
+def _is_ipdoctest(config: Config, path: Path, parent: Collector) -> bool:
+    if path.suffix in (".txt", ".rst") and parent.session.isinitpath(path):
+        return True
+    globs = config.getoption("ipdoctestglob") or ["test*.txt"]
+    return any(fnmatch_ex(glob, path) for glob in globs)
+
+
+def _is_main_py(path: Path) -> bool:
+    return path.name == "__main__.py"
+
+
+class ReprFailDoctest(TerminalRepr):
+    def __init__(
+        self, reprlocation_lines: Sequence[Tuple[ReprFileLocation, Sequence[str]]]
+    ) -> None:
+        self.reprlocation_lines = reprlocation_lines
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        for reprlocation, lines in self.reprlocation_lines:
+            for line in lines:
+                tw.line(line)
+            reprlocation.toterminal(tw)
+
+
+class MultipleDoctestFailures(Exception):
+    def __init__(self, failures: Sequence["doctest.DocTestFailure"]) -> None:
+        super().__init__()
+        self.failures = failures
+
+
+def _init_runner_class() -> Type["IPDocTestRunner"]:
+    import doctest
+    from .ipdoctest import IPDocTestRunner
+
+    class PytestDoctestRunner(IPDocTestRunner):
+        """Runner to collect failures.
+
+        Note that the out variable in this case is a list instead of a
+        stdout-like object.
+        """
+
+        def __init__(
+            self,
+            checker: Optional["IPDoctestOutputChecker"] = None,
+            verbose: Optional[bool] = None,
+            optionflags: int = 0,
+            continue_on_failure: bool = True,
+        ) -> None:
+            super().__init__(checker=checker, verbose=verbose, optionflags=optionflags)
+            self.continue_on_failure = continue_on_failure
+
+        def report_failure(
+            self,
+            out,
+            test: "doctest.DocTest",
+            example: "doctest.Example",
+            got: str,
+        ) -> None:
+            failure = doctest.DocTestFailure(test, example, got)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+        def report_unexpected_exception(
+            self,
+            out,
+            test: "doctest.DocTest",
+            example: "doctest.Example",
+            exc_info: Tuple[Type[BaseException], BaseException, types.TracebackType],
+        ) -> None:
+            if isinstance(exc_info[1], OutcomeException):
+                raise exc_info[1]
+            if isinstance(exc_info[1], bdb.BdbQuit):
+                outcomes.exit("Quitting debugger")
+            failure = doctest.UnexpectedException(test, example, exc_info)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+    return PytestDoctestRunner
+
+
+def _get_runner(
+    checker: Optional["IPDoctestOutputChecker"] = None,
+    verbose: Optional[bool] = None,
+    optionflags: int = 0,
+    continue_on_failure: bool = True,
+) -> "IPDocTestRunner":
+    # We need this in order to do a lazy import on doctest
+    global RUNNER_CLASS
+    if RUNNER_CLASS is None:
+        RUNNER_CLASS = _init_runner_class()
+    # Type ignored because the continue_on_failure argument is only defined on
+    # PytestDoctestRunner, which is lazily defined so can't be used as a type.
+    return RUNNER_CLASS(  # type: ignore
+        checker=checker,
+        verbose=verbose,
+        optionflags=optionflags,
+        continue_on_failure=continue_on_failure,
+    )
+
+
+class IPDoctestItem(pytest.Item):
+    def __init__(
+        self,
+        name: str,
+        parent: "Union[IPDoctestTextfile, IPDoctestModule]",
+        runner: Optional["IPDocTestRunner"] = None,
+        dtest: Optional["doctest.DocTest"] = None,
+    ) -> None:
+        super().__init__(name, parent)
+        self.runner = runner
+        self.dtest = dtest
+        self.obj = None
+        self.fixture_request: Optional[FixtureRequest] = None
+
+    @classmethod
+    def from_parent(  # type: ignore
+        cls,
+        parent: "Union[IPDoctestTextfile, IPDoctestModule]",
+        *,
+        name: str,
+        runner: "IPDocTestRunner",
+        dtest: "doctest.DocTest",
+    ):
+        # incompatible signature due to imposed limits on subclass
+        """The public named constructor."""
+        return super().from_parent(name=name, parent=parent, runner=runner, dtest=dtest)
+
+    def setup(self) -> None:
+        if self.dtest is not None:
+            self.fixture_request = _setup_fixtures(self)
+            globs = dict(getfixture=self.fixture_request.getfixturevalue)
+            for name, value in self.fixture_request.getfixturevalue(
+                "ipdoctest_namespace"
+            ).items():
+                globs[name] = value
+            self.dtest.globs.update(globs)
+
+            from .ipdoctest import IPExample
+
+            if isinstance(self.dtest.examples[0], IPExample):
+                # for IPython examples *only*, we swap the globals with the ipython
+                # namespace, after updating it with the globals (which doctest
+                # fills with the necessary info from the module being tested).
+                self._user_ns_orig = {}
+                self._user_ns_orig.update(_ip.user_ns)
+                _ip.user_ns.update(self.dtest.globs)
+                # We must remove the _ key in the namespace, so that Python's
+                # doctest code sets it naturally
+                _ip.user_ns.pop("_", None)
+                _ip.user_ns["__builtins__"] = builtins
+                self.dtest.globs = _ip.user_ns
+
+    def teardown(self) -> None:
+        from .ipdoctest import IPExample
+
+        # Undo the test.globs reassignment we made
+        if isinstance(self.dtest.examples[0], IPExample):
+            self.dtest.globs = {}
+            _ip.user_ns.clear()
+            _ip.user_ns.update(self._user_ns_orig)
+            del self._user_ns_orig
+
+        self.dtest.globs.clear()
+
+    def runtest(self) -> None:
+        assert self.dtest is not None
+        assert self.runner is not None
+        _check_all_skipped(self.dtest)
+        self._disable_output_capturing_for_darwin()
+        failures: List["doctest.DocTestFailure"] = []
+
+        # exec(compile(..., "single", ...), ...) puts result in builtins._
+        had_underscore_value = hasattr(builtins, "_")
+        underscore_original_value = getattr(builtins, "_", None)
+
+        # Save our current directory and switch out to the one where the
+        # test was originally created, in case another doctest did a
+        # directory change.  We'll restore this in the finally clause.
+        curdir = os.getcwd()
+        os.chdir(self.fspath.dirname)
+        try:
+            # Type ignored because we change the type of `out` from what
+            # ipdoctest expects.
+            self.runner.run(self.dtest, out=failures, clear_globs=False)  # type: ignore[arg-type]
+        finally:
+            os.chdir(curdir)
+            if had_underscore_value:
+                setattr(builtins, "_", underscore_original_value)
+            elif hasattr(builtins, "_"):
+                delattr(builtins, "_")
+
+        if failures:
+            raise MultipleDoctestFailures(failures)
+
+    def _disable_output_capturing_for_darwin(self) -> None:
+        """Disable output capturing. Otherwise, stdout is lost to ipdoctest (pytest#985)."""
+        if platform.system() != "Darwin":
+            return
+        capman = self.config.pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend_global_capture(in_=True)
+            out, err = capman.read_global_capture()
+            sys.stdout.write(out)
+            sys.stderr.write(err)
+
+    # TODO: Type ignored -- breaks Liskov Substitution.
+    def repr_failure(  # type: ignore[override]
+        self,
+        excinfo: ExceptionInfo[BaseException],
+    ) -> Union[str, TerminalRepr]:
+        import doctest
+
+        failures: Optional[
+            Sequence[Union[doctest.DocTestFailure, doctest.UnexpectedException]]
+        ] = None
+        if isinstance(
+            excinfo.value, (doctest.DocTestFailure, doctest.UnexpectedException)
+        ):
+            failures = [excinfo.value]
+        elif isinstance(excinfo.value, MultipleDoctestFailures):
+            failures = excinfo.value.failures
+
+        if failures is None:
+            return super().repr_failure(excinfo)
+
+        reprlocation_lines = []
+        for failure in failures:
+            example = failure.example
+            test = failure.test
+            filename = test.filename
+            if test.lineno is None:
+                lineno = None
+            else:
+                lineno = test.lineno + example.lineno + 1
+            message = type(failure).__name__
+            # TODO: ReprFileLocation doesn't expect a None lineno.
+            reprlocation = ReprFileLocation(filename, lineno, message)  # type: ignore[arg-type]
+            checker = _get_checker()
+            report_choice = _get_report_choice(self.config.getoption("ipdoctestreport"))
+            if lineno is not None:
+                assert failure.test.docstring is not None
+                lines = failure.test.docstring.splitlines(False)
+                # add line numbers to the left of the error message
+                assert test.lineno is not None
+                lines = [
+                    "%03d %s" % (i + test.lineno + 1, x) for (i, x) in enumerate(lines)
+                ]
+                # trim docstring error lines to 10
+                lines = lines[max(example.lineno - 9, 0) : example.lineno + 1]
+            else:
+                lines = [
+                    "EXAMPLE LOCATION UNKNOWN, not showing all tests of that example"
+                ]
+                indent = ">>>"
+                for line in example.source.splitlines():
+                    lines.append(f"??? {indent} {line}")
+                    indent = "..."
+            if isinstance(failure, doctest.DocTestFailure):
+                lines += checker.output_difference(
+                    example, failure.got, report_choice
+                ).split("\n")
+            else:
+                inner_excinfo = ExceptionInfo.from_exc_info(failure.exc_info)
+                lines += ["UNEXPECTED EXCEPTION: %s" % repr(inner_excinfo.value)]
+                lines += [
+                    x.strip("\n") for x in traceback.format_exception(*failure.exc_info)
+                ]
+            reprlocation_lines.append((reprlocation, lines))
+        return ReprFailDoctest(reprlocation_lines)
+
+    def reportinfo(self) -> Tuple[Union["os.PathLike[str]", str], Optional[int], str]:
+        assert self.dtest is not None
+        return self.path, self.dtest.lineno, "[ipdoctest] %s" % self.name
+
+    if int(pytest.__version__.split(".")[0]) < 7:
+
+        @property
+        def path(self) -> Path:
+            return Path(self.fspath)
+
+
+def _get_flag_lookup() -> Dict[str, int]:
+    import doctest
+
+    return dict(
+        DONT_ACCEPT_TRUE_FOR_1=doctest.DONT_ACCEPT_TRUE_FOR_1,
+        DONT_ACCEPT_BLANKLINE=doctest.DONT_ACCEPT_BLANKLINE,
+        NORMALIZE_WHITESPACE=doctest.NORMALIZE_WHITESPACE,
+        ELLIPSIS=doctest.ELLIPSIS,
+        IGNORE_EXCEPTION_DETAIL=doctest.IGNORE_EXCEPTION_DETAIL,
+        COMPARISON_FLAGS=doctest.COMPARISON_FLAGS,
+        ALLOW_UNICODE=_get_allow_unicode_flag(),
+        ALLOW_BYTES=_get_allow_bytes_flag(),
+        NUMBER=_get_number_flag(),
+    )
+
+
+def get_optionflags(parent):
+    optionflags_str = parent.config.getini("ipdoctest_optionflags")
+    flag_lookup_table = _get_flag_lookup()
+    flag_acc = 0
+    for flag in optionflags_str:
+        flag_acc |= flag_lookup_table[flag]
+    return flag_acc
+
+
+def _get_continue_on_failure(config):
+    continue_on_failure = config.getvalue("ipdoctest_continue_on_failure")
+    if continue_on_failure:
+        # We need to turn off this if we use pdb since we should stop at
+        # the first failure.
+        if config.getvalue("usepdb"):
+            continue_on_failure = False
+    return continue_on_failure
+
+
+class IPDoctestTextfile(pytest.Module):
+    obj = None
+
+    def collect(self) -> Iterable[IPDoctestItem]:
+        import doctest
+        from .ipdoctest import IPDocTestParser
+
+        # Inspired by doctest.testfile; ideally we would use it directly,
+        # but it doesn't support passing a custom checker.
+        encoding = self.config.getini("ipdoctest_encoding")
+        text = self.path.read_text(encoding)
+        filename = str(self.path)
+        name = self.path.name
+        globs = {"__name__": "__main__"}
+
+        optionflags = get_optionflags(self)
+
+        runner = _get_runner(
+            verbose=False,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+
+        parser = IPDocTestParser()
+        test = parser.get_doctest(text, globs, name, filename, 0)
+        if test.examples:
+            yield IPDoctestItem.from_parent(
+                self, name=test.name, runner=runner, dtest=test
+            )
+
+    if int(pytest.__version__.split(".")[0]) < 7:
+
+        @property
+        def path(self) -> Path:
+            return Path(self.fspath)
+
+        @classmethod
+        def from_parent(
+            cls,
+            parent,
+            *,
+            fspath=None,
+            path: Optional[Path] = None,
+            **kw,
+        ):
+            if path is not None:
+                import py.path
+
+                fspath = py.path.local(path)
+            return super().from_parent(parent=parent, fspath=fspath, **kw)
+
+
+def _check_all_skipped(test: "doctest.DocTest") -> None:
+    """Raise pytest.skip() if all examples in the given DocTest have the SKIP
+    option set."""
+    import doctest
+
+    all_skipped = all(x.options.get(doctest.SKIP, False) for x in test.examples)
+    if all_skipped:
+        pytest.skip("all docstests skipped by +SKIP option")
+
+
+def _is_mocked(obj: object) -> bool:
+    """Return if an object is possibly a mock object by checking the
+    existence of a highly improbable attribute."""
+    return (
+        safe_getattr(obj, "pytest_mock_example_attribute_that_shouldnt_exist", None)
+        is not None
+    )
+
+
+@contextmanager
+def _patch_unwrap_mock_aware() -> Generator[None, None, None]:
+    """Context manager which replaces ``inspect.unwrap`` with a version
+    that's aware of mock objects and doesn't recurse into them."""
+    real_unwrap = inspect.unwrap
+
+    def _mock_aware_unwrap(
+        func: Callable[..., Any], *, stop: Optional[Callable[[Any], Any]] = None
+    ) -> Any:
+        try:
+            if stop is None or stop is _is_mocked:
+                return real_unwrap(func, stop=_is_mocked)
+            _stop = stop
+            return real_unwrap(func, stop=lambda obj: _is_mocked(obj) or _stop(func))
+        except Exception as e:
+            warnings.warn(
+                "Got %r when unwrapping %r.  This is usually caused "
+                "by a violation of Python's object protocol; see e.g. "
+                "https://github.com/pytest-dev/pytest/issues/5080" % (e, func),
+                PytestWarning,
+            )
+            raise
+
+    inspect.unwrap = _mock_aware_unwrap
+    try:
+        yield
+    finally:
+        inspect.unwrap = real_unwrap
+
+
+class IPDoctestModule(pytest.Module):
+    def collect(self) -> Iterable[IPDoctestItem]:
+        import doctest
+        from .ipdoctest import DocTestFinder, IPDocTestParser
+
+        class MockAwareDocTestFinder(DocTestFinder):
+            """A hackish ipdoctest finder that overrides stdlib internals to fix a stdlib bug.
+
+            https://github.com/pytest-dev/pytest/issues/3456
+            https://bugs.python.org/issue25532
+            """
+
+            def _find_lineno(self, obj, source_lines):
+                """Doctest code does not take into account `@property`, this
+                is a hackish way to fix it. https://bugs.python.org/issue17446
+
+                Wrapped Doctests will need to be unwrapped so the correct
+                line number is returned. This will be reported upstream. #8796
+                """
+                if isinstance(obj, property):
+                    obj = getattr(obj, "fget", obj)
+
+                if hasattr(obj, "__wrapped__"):
+                    # Get the main obj in case of it being wrapped
+                    obj = inspect.unwrap(obj)
+
+                # Type ignored because this is a private function.
+                return super()._find_lineno(  # type:ignore[misc]
+                    obj,
+                    source_lines,
+                )
+
+            def _find(
+                self, tests, obj, name, module, source_lines, globs, seen
+            ) -> None:
+                if _is_mocked(obj):
+                    return
+                with _patch_unwrap_mock_aware():
+
+                    # Type ignored because this is a private function.
+                    super()._find(  # type:ignore[misc]
+                        tests, obj, name, module, source_lines, globs, seen
+                    )
+
+        if self.path.name == "conftest.py":
+            if int(pytest.__version__.split(".")[0]) < 7:
+                module = self.config.pluginmanager._importconftest(
+                    self.path,
+                    self.config.getoption("importmode"),
+                )
+            else:
+                module = self.config.pluginmanager._importconftest(
+                    self.path,
+                    self.config.getoption("importmode"),
+                    rootpath=self.config.rootpath,
+                )
+        else:
+            try:
+                module = import_path(self.path, root=self.config.rootpath)
+            except ImportError:
+                if self.config.getvalue("ipdoctest_ignore_import_errors"):
+                    pytest.skip("unable to import module %r" % self.path)
+                else:
+                    raise
+        # Uses internal doctest module parsing mechanism.
+        finder = MockAwareDocTestFinder(parser=IPDocTestParser())
+        optionflags = get_optionflags(self)
+        runner = _get_runner(
+            verbose=False,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+
+        for test in finder.find(module, module.__name__):
+            if test.examples:  # skip empty ipdoctests
+                yield IPDoctestItem.from_parent(
+                    self, name=test.name, runner=runner, dtest=test
+                )
+
+    if int(pytest.__version__.split(".")[0]) < 7:
+
+        @property
+        def path(self) -> Path:
+            return Path(self.fspath)
+
+        @classmethod
+        def from_parent(
+            cls,
+            parent,
+            *,
+            fspath=None,
+            path: Optional[Path] = None,
+            **kw,
+        ):
+            if path is not None:
+                import py.path
+
+                fspath = py.path.local(path)
+            return super().from_parent(parent=parent, fspath=fspath, **kw)
+
+
+def _setup_fixtures(doctest_item: IPDoctestItem) -> FixtureRequest:
+    """Used by IPDoctestTextfile and IPDoctestItem to setup fixture information."""
+
+    def func() -> None:
+        pass
+
+    doctest_item.funcargs = {}  # type: ignore[attr-defined]
+    fm = doctest_item.session._fixturemanager
+    doctest_item._fixtureinfo = fm.getfixtureinfo(  # type: ignore[attr-defined]
+        node=doctest_item, func=func, cls=None, funcargs=False
+    )
+    fixture_request = FixtureRequest(doctest_item, _ispytest=True)
+    fixture_request._fillfixtures()
+    return fixture_request
+
+
+def _init_checker_class() -> Type["IPDoctestOutputChecker"]:
+    import doctest
+    import re
+    from .ipdoctest import IPDoctestOutputChecker
+
+    class LiteralsOutputChecker(IPDoctestOutputChecker):
+        # Based on doctest_nose_plugin.py from the nltk project
+        # (https://github.com/nltk/nltk) and on the "numtest" doctest extension
+        # by Sebastien Boisgerault (https://github.com/boisgera/numtest).
+
+        _unicode_literal_re = re.compile(r"(\W|^)[uU]([rR]?[\'\"])", re.UNICODE)
+        _bytes_literal_re = re.compile(r"(\W|^)[bB]([rR]?[\'\"])", re.UNICODE)
+        _number_re = re.compile(
+            r"""
+            (?P<number>
+              (?P<mantissa>
+                (?P<integer1> [+-]?\d*)\.(?P<fraction>\d+)
+                |
+                (?P<integer2> [+-]?\d+)\.
+              )
+              (?:
+                [Ee]
+                (?P<exponent1> [+-]?\d+)
+              )?
+              |
+              (?P<integer3> [+-]?\d+)
+              (?:
+                [Ee]
+                (?P<exponent2> [+-]?\d+)
+              )
+            )
+            """,
+            re.VERBOSE,
+        )
+
+        def check_output(self, want: str, got: str, optionflags: int) -> bool:
+            if super().check_output(want, got, optionflags):
+                return True
+
+            allow_unicode = optionflags & _get_allow_unicode_flag()
+            allow_bytes = optionflags & _get_allow_bytes_flag()
+            allow_number = optionflags & _get_number_flag()
+
+            if not allow_unicode and not allow_bytes and not allow_number:
+                return False
+
+            def remove_prefixes(regex: Pattern[str], txt: str) -> str:
+                return re.sub(regex, r"\1\2", txt)
+
+            if allow_unicode:
+                want = remove_prefixes(self._unicode_literal_re, want)
+                got = remove_prefixes(self._unicode_literal_re, got)
+
+            if allow_bytes:
+                want = remove_prefixes(self._bytes_literal_re, want)
+                got = remove_prefixes(self._bytes_literal_re, got)
+
+            if allow_number:
+                got = self._remove_unwanted_precision(want, got)
+
+            return super().check_output(want, got, optionflags)
+
+        def _remove_unwanted_precision(self, want: str, got: str) -> str:
+            wants = list(self._number_re.finditer(want))
+            gots = list(self._number_re.finditer(got))
+            if len(wants) != len(gots):
+                return got
+            offset = 0
+            for w, g in zip(wants, gots):
+                fraction: Optional[str] = w.group("fraction")
+                exponent: Optional[str] = w.group("exponent1")
+                if exponent is None:
+                    exponent = w.group("exponent2")
+                precision = 0 if fraction is None else len(fraction)
+                if exponent is not None:
+                    precision -= int(exponent)
+                if float(w.group()) == approx(float(g.group()), abs=10 ** -precision):
+                    # They're close enough. Replace the text we actually
+                    # got with the text we want, so that it will match when we
+                    # check the string literally.
+                    got = (
+                        got[: g.start() + offset] + w.group() + got[g.end() + offset :]
+                    )
+                    offset += w.end() - w.start() - (g.end() - g.start())
+            return got
+
+    return LiteralsOutputChecker
+
+
+def _get_checker() -> "IPDoctestOutputChecker":
+    """Return a IPDoctestOutputChecker subclass that supports some
+    additional options:
+
+    * ALLOW_UNICODE and ALLOW_BYTES options to ignore u'' and b''
+      prefixes (respectively) in string literals. Useful when the same
+      ipdoctest should run in Python 2 and Python 3.
+
+    * NUMBER to ignore floating-point differences smaller than the
+      precision of the literal number in the ipdoctest.
+
+    An inner class is used to avoid importing "ipdoctest" at the module
+    level.
+    """
+    global CHECKER_CLASS
+    if CHECKER_CLASS is None:
+        CHECKER_CLASS = _init_checker_class()
+    return CHECKER_CLASS()
+
+
+def _get_allow_unicode_flag() -> int:
+    """Register and return the ALLOW_UNICODE flag."""
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_UNICODE")
+
+
+def _get_allow_bytes_flag() -> int:
+    """Register and return the ALLOW_BYTES flag."""
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_BYTES")
+
+
+def _get_number_flag() -> int:
+    """Register and return the NUMBER flag."""
+    import doctest
+
+    return doctest.register_optionflag("NUMBER")
+
+
+def _get_report_choice(key: str) -> int:
+    """Return the actual `ipdoctest` module flag value.
+
+    We want to do it as late as possible to avoid importing `ipdoctest` and all
+    its dependencies when parsing options, as it adds overhead and breaks tests.
+    """
+    import doctest
+
+    return {
+        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
+        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
+        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
+        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
+        DOCTEST_REPORT_CHOICE_NONE: 0,
+    }[key]
+
+
+@pytest.fixture(scope="session")
+def ipdoctest_namespace() -> Dict[str, Any]:
+    """Fixture that returns a :py:class:`dict` that will be injected into the
+    namespace of ipdoctests."""
+    return dict()

.venv/Lib/site-packages/IPython/testing/plugin/setup.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+"""A Nose plugin to support IPython doctests.
+"""
+
+from setuptools import setup
+
+setup(name='IPython doctest plugin',
+      version='0.1',
+      author='The IPython Team',
+      description = 'Nose plugin to load IPython-extended doctests',
+      license = 'LGPL',
+      py_modules = ['ipdoctest'],
+      entry_points = {
+        'nose.plugins.0.10': ['ipdoctest = ipdoctest:IPythonDoctest',
+                              'extdoctest = ipdoctest:ExtensionDoctest',
+                              ],
+        },
+      )

.venv/Lib/site-packages/IPython/testing/plugin/simple.py

@@ -0,0 +1,44 @@
+"""Simple example using doctests.
+
+This file just contains doctests both using plain python and IPython prompts.
+All tests should be loaded by Pytest.
+"""
+
+def pyfunc():
+    """Some pure python tests...
+
+    >>> pyfunc()
+    'pyfunc'
+
+    >>> import os
+
+    >>> 2+3
+    5
+
+    >>> for i in range(3):
+    ...     print(i, end=' ')
+    ...     print(i+1, end=' ')
+    ...
+    0 1 1 2 2 3 
+    """
+    return 'pyfunc'
+
+
+def ipyfunc():
+    """Some IPython tests...
+
+    In [1]: ipyfunc()
+    Out[1]: 'ipyfunc'
+
+    In [2]: import os
+
+    In [3]: 2+3
+    Out[3]: 5
+
+    In [4]: for i in range(3):
+       ...:     print(i, end=' ')
+       ...:     print(i+1, end=' ')
+       ...:
+    Out[4]: 0 1 1 2 2 3
+    """
+    return "ipyfunc"

.venv/Lib/site-packages/IPython/testing/plugin/simplevars.py

@@ -0,0 +1,2 @@
+x = 1
+print('x is:',x)

.venv/Lib/site-packages/IPython/testing/plugin/test_combo.txt

@@ -0,0 +1,36 @@
+=======================
+ Combo testing example
+=======================
+
+This is a simple example that mixes ipython doctests::
+
+    In [1]: import code
+
+    In [2]: 2**12
+    Out[2]: 4096
+
+with command-line example information that does *not* get executed::
+
+    $ mpirun -n 4 ipengine --controller-port=10000 --controller-ip=host0
+
+and with literal examples of Python source code::
+
+    controller = dict(host='myhost',
+		      engine_port=None, # default is 10105
+		      control_port=None,
+		      )
+
+    # keys are hostnames, values are the number of engine on that host
+    engines = dict(node1=2,
+		   node2=2,
+		   node3=2,
+		   node3=2,
+		   )
+
+    # Force failure to detect that this test is being run.
+    1/0
+
+These source code examples are executed but no output is compared at all.  An
+error or failure is reported only if an exception is raised.
+
+NOTE: the execution of pure python blocks is not yet working!

.venv/Lib/site-packages/IPython/testing/plugin/test_example.txt

@@ -0,0 +1,24 @@
+=====================================
+ Tests in example form - pure python
+=====================================
+
+This file contains doctest examples embedded as code blocks, using normal
+Python prompts.  See the accompanying file for similar examples using IPython
+prompts (you can't mix both types within one file). The following will be run
+as a test::
+
+    >>> 1+1
+    2
+    >>> print ("hello")
+    hello
+
+More than one example works::
+
+    >>> s="Hello World"
+
+    >>> s.upper()
+    'HELLO WORLD'
+
+but you should note that the *entire* test file is considered to be a single
+test.  Individual code blocks that fail are printed separately as ``example
+failures``, but the whole file is still counted and reported as one test.

.venv/Lib/site-packages/IPython/testing/plugin/test_exampleip.txt

@@ -0,0 +1,30 @@
+=================================
+ Tests in example form - IPython
+=================================
+
+You can write text files with examples that use IPython prompts (as long as you
+use the nose ipython doctest plugin), but you can not mix and match prompt
+styles in a single file.  That is, you either use all ``>>>`` prompts or all
+IPython-style prompts.  Your test suite *can* have both types, you just need to
+put each type of example in a separate. Using IPython prompts, you can paste
+directly from your session::
+
+    In [5]: s="Hello World"
+
+    In [6]: s.upper()
+    Out[6]: 'HELLO WORLD'
+
+Another example::
+
+    In [8]: 1+3
+    Out[8]: 4
+
+Just like in IPython docstrings, you can use all IPython syntax and features::
+
+    In [9]: !echo hello
+    hello
+
+    In [10]: a='hi'
+
+    In [11]: !echo $a
+    hi

.venv/Lib/site-packages/IPython/testing/plugin/test_ipdoctest.py

@@ -0,0 +1,92 @@
+"""Tests for the ipdoctest machinery itself.
+
+Note: in a file named test_X, functions whose only test is their docstring (as
+a doctest) and which have no test functionality of their own, should be called
+'doctest_foo' instead of 'test_foo', otherwise they get double-counted (the
+empty function call is counted as a test, which just inflates tests numbers
+artificially).
+"""
+
+def doctest_simple():
+    """ipdoctest must handle simple inputs
+    
+    In [1]: 1
+    Out[1]: 1
+
+    In [2]: print(1)
+    1
+    """
+
+def doctest_multiline1():
+    """The ipdoctest machinery must handle multiline examples gracefully.
+
+    In [2]: for i in range(4):
+       ...:     print(i)
+       ...:      
+    0
+    1
+    2
+    3
+    """
+
+def doctest_multiline2():
+    """Multiline examples that define functions and print output.
+
+    In [7]: def f(x):
+       ...:     return x+1
+       ...: 
+
+    In [8]: f(1)
+    Out[8]: 2
+
+    In [9]: def g(x):
+       ...:     print('x is:',x)
+       ...:      
+
+    In [10]: g(1)
+    x is: 1
+
+    In [11]: g('hello')
+    x is: hello
+    """
+
+
+def doctest_multiline3():
+    """Multiline examples with blank lines.
+
+    In [12]: def h(x):
+       ....:     if x>1:
+       ....:         return x**2
+       ....:     # To leave a blank line in the input, you must mark it
+       ....:     # with a comment character:
+       ....:     #
+       ....:     # otherwise the doctest parser gets confused.
+       ....:     else:
+       ....:         return -1
+       ....:      
+
+    In [13]: h(5)
+    Out[13]: 25
+
+    In [14]: h(1)
+    Out[14]: -1
+
+    In [15]: h(0)
+    Out[15]: -1
+   """
+
+
+def doctest_builtin_underscore():
+    """Defining builtins._ should not break anything outside the doctest
+    while also should be working as expected inside the doctest.
+
+    In [1]: import builtins
+
+    In [2]: builtins._ = 42
+
+    In [3]: builtins._
+    Out[3]: 42
+
+    In [4]: _
+    Out[4]: 42
+    """

.venv/Lib/site-packages/IPython/testing/plugin/test_refs.py

@@ -0,0 +1,39 @@
+"""Some simple tests for the plugin while running scripts.
+"""
+# Module imports
+# Std lib
+import inspect
+
+# Our own
+
+#-----------------------------------------------------------------------------
+# Testing functions
+
+def test_trivial():
+    """A trivial passing test."""
+    pass
+
+def doctest_run():
+    """Test running a trivial script.
+
+    In [13]: run simplevars.py
+    x is: 1
+    """
+
+def doctest_runvars():
+    """Test that variables defined in scripts get loaded correctly via %run.
+
+    In [13]: run simplevars.py
+    x is: 1
+
+    In [14]: x
+    Out[14]: 1
+    """
+
+def doctest_ivars():
+    """Test that variables defined interactively are picked up.
+    In [5]: zz=1
+
+    In [6]: zz
+    Out[6]: 1
+    """

.venv/Lib/site-packages/IPython/testing/skipdoctest.py

@@ -0,0 +1,19 @@
+"""Decorators marks that a doctest should be skipped.
+
+The IPython.testing.decorators module triggers various extra imports, including
+numpy and sympy if they're present. Since this decorator is used in core parts
+of IPython, it's in a separate module so that running IPython doesn't trigger
+those imports."""
+
+# Copyright (C) IPython Development Team
+# Distributed under the terms of the Modified BSD License.
+
+
+def skip_doctest(f):
+    """Decorator - mark a function or method for skipping its doctest.
+
+    This decorator allows you to mark a function whose docstring you wish to
+    omit from testing, while preserving the docstring for introspection, help,
+    etc."""
+    f.__skip_doctest__ = True
+    return f

.venv/Lib/site-packages/IPython/testing/tests/__init__.py

@@ -0,0 +1,10 @@
+# encoding: utf-8
+__docformat__ = "restructuredtext en"
+#-------------------------------------------------------------------------------
+#       Copyright (C) 2005  Fernando Perez <fperez@colorado.edu>
+#                           Brian E Granger <ellisonbg@gmail.com>
+#                           Benjamin Ragan-Kelley <benjaminrk@gmail.com>
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-------------------------------------------------------------------------------

.venv/Lib/site-packages/IPython/testing/tests/test_decorators.py

@@ -0,0 +1,166 @@
+"""Tests for the decorators we've created for IPython.
+"""
+
+# Module imports
+# Std lib
+import inspect
+import sys
+
+# Our own
+from IPython.testing import decorators as dec
+from IPython.testing.skipdoctest import skip_doctest
+
+#-----------------------------------------------------------------------------
+# Utilities
+
+# Note: copied from OInspect, kept here so the testing stuff doesn't create
+# circular dependencies and is easier to reuse.
+def getargspec(obj):
+    """Get the names and default values of a function's arguments.
+
+    A tuple of four things is returned: (args, varargs, varkw, defaults).
+    'args' is a list of the argument names (it may contain nested lists).
+    'varargs' and 'varkw' are the names of the * and ** arguments or None.
+    'defaults' is an n-tuple of the default values of the last n arguments.
+
+    Modified version of inspect.getargspec from the Python Standard
+    Library."""
+
+    if inspect.isfunction(obj):
+        func_obj = obj
+    elif inspect.ismethod(obj):
+        func_obj = obj.__func__
+    else:
+        raise TypeError('arg is not a Python function')
+    args, varargs, varkw = inspect.getargs(func_obj.__code__)
+    return args, varargs, varkw, func_obj.__defaults__
+
+#-----------------------------------------------------------------------------
+# Testing functions
+
+@dec.as_unittest
+def trivial():
+    """A trivial test"""
+    pass
+
+
+@dec.skip()
+def test_deliberately_broken():
+    """A deliberately broken test - we want to skip this one."""
+    1/0
+
+@dec.skip('Testing the skip decorator')
+def test_deliberately_broken2():
+    """Another deliberately broken test - we want to skip this one."""
+    1/0
+
+
+# Verify that we can correctly skip the doctest for a function at will, but
+# that the docstring itself is NOT destroyed by the decorator.
+@skip_doctest
+def doctest_bad(x,y=1,**k):
+    """A function whose doctest we need to skip.
+
+    >>> 1+1
+    3
+    """
+    print('x:',x)
+    print('y:',y)
+    print('k:',k)
+
+
+def call_doctest_bad():
+    """Check that we can still call the decorated functions.
+    
+    >>> doctest_bad(3,y=4)
+    x: 3
+    y: 4
+    k: {}
+    """
+    pass
+
+
+def test_skip_dt_decorator():
+    """Doctest-skipping decorator should preserve the docstring.
+    """
+    # Careful: 'check' must be a *verbatim* copy of the doctest_bad docstring!
+    check = """A function whose doctest we need to skip.
+
+    >>> 1+1
+    3
+    """
+    # Fetch the docstring from doctest_bad after decoration.
+    val = doctest_bad.__doc__
+    
+    assert check == val, "doctest_bad docstrings don't match"
+
+
+# Doctest skipping should work for class methods too
+class FooClass(object):
+    """FooClass
+
+    Example:
+
+    >>> 1+1
+    2
+    """
+
+    @skip_doctest
+    def __init__(self,x):
+        """Make a FooClass.
+
+        Example:
+
+        >>> f = FooClass(3)
+        junk
+        """
+        print('Making a FooClass.')
+        self.x = x
+        
+    @skip_doctest
+    def bar(self,y):
+        """Example:
+
+        >>> ff = FooClass(3)
+        >>> ff.bar(0)
+        boom!
+        >>> 1/0
+        bam!
+        """
+        return 1/y
+
+    def baz(self,y):
+        """Example:
+
+        >>> ff2 = FooClass(3)
+        Making a FooClass.
+        >>> ff2.baz(3)
+        True
+        """
+        return self.x==y
+
+
+def test_skip_dt_decorator2():
+    """Doctest-skipping decorator should preserve function signature.
+    """
+    # Hardcoded correct answer
+    dtargs = (['x', 'y'], None, 'k', (1,))
+    # Introspect out the value
+    dtargsr = getargspec(doctest_bad)
+    assert dtargsr==dtargs, \
+           "Incorrectly reconstructed args for doctest_bad: %s" % (dtargsr,)
+
+
+@dec.skip_linux
+def test_linux():
+    assert sys.platform.startswith("linux") is False, "This test can't run under linux"
+
+
+@dec.skip_win32
+def test_win32():
+    assert sys.platform != "win32", "This test can't run under windows"
+
+
+@dec.skip_osx
+def test_osx():
+    assert sys.platform != "darwin", "This test can't run under osx"

.venv/Lib/site-packages/IPython/testing/tests/test_ipunittest.py

@@ -0,0 +1,131 @@
+"""Tests for IPython's test support utilities.
+
+These are decorators that allow standalone functions and docstrings to be seen
+as tests by unittest, replicating some of nose's functionality.  Additionally,
+IPython-syntax docstrings can be auto-converted to '>>>' so that ipython
+sessions can be copy-pasted as tests.
+
+This file can be run as a script, and it will call unittest.main().  We must
+check that it works with unittest as well as with nose...
+
+
+Notes:
+
+- Using nosetests --with-doctest --doctest-tests testfile.py
+  will find docstrings as tests wherever they are, even in methods.  But
+  if we use ipython syntax in the docstrings, they must be decorated with
+  @ipdocstring.  This is OK for test-only code, but not for user-facing
+  docstrings where we want to keep the ipython syntax.
+
+- Using nosetests --with-doctest file.py
+  also finds doctests if the file name doesn't have 'test' in it, because it is
+  treated like a normal module.  But if nose treats the file like a test file,
+  then for normal classes to be doctested the extra --doctest-tests is
+  necessary.
+
+- running this script with python (it has a __main__ section at the end) misses
+  one docstring test, the one embedded in the Foo object method.  Since our
+  approach relies on using decorators that create standalone TestCase
+  instances, it can only be used for functions, not for methods of objects.
+Authors
+-------
+
+- Fernando Perez <Fernando.Perez@berkeley.edu>
+"""
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2009-2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+from IPython.testing.ipunittest import ipdoctest, ipdocstring
+
+#-----------------------------------------------------------------------------
+# Test classes and functions
+#-----------------------------------------------------------------------------
+@ipdoctest
+def simple_dt():
+    """
+    >>> print(1+1)
+    2
+    """
+
+
+@ipdoctest
+def ipdt_flush():
+    """
+In [20]: print(1)
+1
+
+In [26]: for i in range(4):
+   ....:     print(i)
+   ....:     
+   ....: 
+0
+1
+2
+3
+
+In [27]: 3+4
+Out[27]: 7
+"""
+
+
+@ipdoctest
+def ipdt_indented_test():
+    """
+    In [20]: print(1)
+    1
+
+    In [26]: for i in range(4):
+       ....:     print(i)
+       ....:     
+       ....: 
+    0
+    1
+    2
+    3
+
+    In [27]: 3+4
+    Out[27]: 7
+    """
+
+
+class Foo(object):
+    """For methods, the normal decorator doesn't work.
+
+    But rewriting the docstring with ip2py does, *but only if using nose
+    --with-doctest*.  Do we want to have that as a dependency?
+    """
+
+    @ipdocstring
+    def ipdt_method(self):
+        """
+        In [20]: print(1)
+        1
+
+        In [26]: for i in range(4):
+           ....:     print(i)
+           ....:     
+           ....: 
+        0
+        1
+        2
+        3
+
+        In [27]: 3+4
+        Out[27]: 7
+        """
+
+    def normaldt_method(self):
+        """
+        >>> print(1+1)
+        2
+        """

.venv/Lib/site-packages/IPython/testing/tests/test_tools.py

@@ -0,0 +1,133 @@
+# encoding: utf-8
+"""
+Tests for testing.tools
+"""
+
+#-----------------------------------------------------------------------------
+#  Copyright (C) 2008-2011  The IPython Development Team
+#
+#  Distributed under the terms of the BSD License.  The full license is in
+#  the file COPYING, distributed as part of this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+import os
+import unittest
+
+from IPython.testing import decorators as dec
+from IPython.testing import tools as tt
+
+#-----------------------------------------------------------------------------
+# Tests
+#-----------------------------------------------------------------------------
+
+@dec.skip_win32
+def test_full_path_posix():
+    spath = "/foo/bar.py"
+    result = tt.full_path(spath, ["a.txt", "b.txt"])
+    assert result, ["/foo/a.txt" == "/foo/b.txt"]
+    spath = "/foo"
+    result = tt.full_path(spath, ["a.txt", "b.txt"])
+    assert result, ["/a.txt" == "/b.txt"]
+    result = tt.full_path(spath, "a.txt")
+    assert result == ["/a.txt"]
+
+
+@dec.skip_if_not_win32
+def test_full_path_win32():
+    spath = "c:\\foo\\bar.py"
+    result = tt.full_path(spath, ["a.txt", "b.txt"])
+    assert result, ["c:\\foo\\a.txt" == "c:\\foo\\b.txt"]
+    spath = "c:\\foo"
+    result = tt.full_path(spath, ["a.txt", "b.txt"])
+    assert result, ["c:\\a.txt" == "c:\\b.txt"]
+    result = tt.full_path(spath, "a.txt")
+    assert result == ["c:\\a.txt"]
+
+    
+def test_parser():
+    err = ("FAILED (errors=1)", 1, 0)
+    fail = ("FAILED (failures=1)", 0, 1)
+    both = ("FAILED (errors=1, failures=1)", 1, 1)
+    for txt, nerr, nfail in [err, fail, both]:
+        nerr1, nfail1 = tt.parse_test_output(txt)
+        assert nerr == nerr1
+        assert nfail == nfail1
+
+
+def test_temp_pyfile():
+    src = 'pass\n'
+    fname = tt.temp_pyfile(src)
+    assert os.path.isfile(fname)
+    with open(fname, encoding="utf-8") as fh2:
+        src2 = fh2.read()
+    assert src2 == src
+
+class TestAssertPrints(unittest.TestCase):
+    def test_passing(self):
+        with tt.AssertPrints("abc"):
+            print("abcd")
+            print("def")
+            print(b"ghi")
+    
+    def test_failing(self):
+        def func():
+            with tt.AssertPrints("abc"):
+                print("acd")
+                print("def")
+                print(b"ghi")
+        
+        self.assertRaises(AssertionError, func)
+
+
+class Test_ipexec_validate(tt.TempFileMixin):
+    def test_main_path(self):
+        """Test with only stdout results.
+        """
+        self.mktmp("print('A')\n"
+                   "print('B')\n"
+                   )
+        out = "A\nB"
+        tt.ipexec_validate(self.fname, out)
+
+    def test_main_path2(self):
+        """Test with only stdout results, expecting windows line endings.
+        """
+        self.mktmp("print('A')\n"
+                   "print('B')\n"
+                   )
+        out = "A\r\nB"
+        tt.ipexec_validate(self.fname, out)
+
+    def test_exception_path(self):
+        """Test exception path in exception_validate.
+        """
+        self.mktmp("import sys\n"
+                   "print('A')\n"
+                   "print('B')\n"
+                   "print('C', file=sys.stderr)\n"
+                   "print('D', file=sys.stderr)\n"
+                   )
+        out = "A\nB"
+        tt.ipexec_validate(self.fname, expected_out=out, expected_err="C\nD")
+
+    def test_exception_path2(self):
+        """Test exception path in exception_validate, expecting windows line endings.
+        """
+        self.mktmp("import sys\n"
+                   "print('A')\n"
+                   "print('B')\n"
+                   "print('C', file=sys.stderr)\n"
+                   "print('D', file=sys.stderr)\n"
+                   )
+        out = "A\r\nB"
+        tt.ipexec_validate(self.fname, expected_out=out, expected_err="C\r\nD")
+
+
+    def tearDown(self):
+        # tear down correctly the mixin,
+        # unittest.TestCase.tearDown does nothing
+        tt.TempFileMixin.tearDown(self)

.venv/Lib/site-packages/IPython/testing/tools.py

@@ -0,0 +1,476 @@
+"""Generic testing tools.
+
+Authors
+-------
+- Fernando Perez <Fernando.Perez@berkeley.edu>
+"""
+
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import os
+from pathlib import Path
+import re
+import sys
+import tempfile
+import unittest
+
+from contextlib import contextmanager
+from io import StringIO
+from subprocess import Popen, PIPE
+from unittest.mock import patch
+
+from traitlets.config.loader import Config
+from IPython.utils.process import get_output_error_code
+from IPython.utils.text import list_strings
+from IPython.utils.io import temp_pyfile, Tee
+from IPython.utils import py3compat
+
+from . import decorators as dec
+from . import skipdoctest
+
+
+# The docstring for full_path doctests differently on win32 (different path
+# separator) so just skip the doctest there.  The example remains informative.
+doctest_deco = skipdoctest.skip_doctest if sys.platform == 'win32' else dec.null_deco
+
+@doctest_deco
+def full_path(startPath,files):
+    """Make full paths for all the listed files, based on startPath.
+
+    Only the base part of startPath is kept, since this routine is typically
+    used with a script's ``__file__`` variable as startPath. The base of startPath
+    is then prepended to all the listed files, forming the output list.
+
+    Parameters
+    ----------
+    startPath : string
+      Initial path to use as the base for the results.  This path is split
+      using os.path.split() and only its first component is kept.
+
+    files : string or list
+      One or more files.
+
+    Examples
+    --------
+
+    >>> full_path('/foo/bar.py',['a.txt','b.txt'])
+    ['/foo/a.txt', '/foo/b.txt']
+
+    >>> full_path('/foo',['a.txt','b.txt'])
+    ['/a.txt', '/b.txt']
+
+    If a single file is given, the output is still a list::
+
+        >>> full_path('/foo','a.txt')
+        ['/a.txt']
+    """
+
+    files = list_strings(files)
+    base = os.path.split(startPath)[0]
+    return [ os.path.join(base,f) for f in files ]
+
+
+def parse_test_output(txt):
+    """Parse the output of a test run and return errors, failures.
+
+    Parameters
+    ----------
+    txt : str
+      Text output of a test run, assumed to contain a line of one of the
+      following forms::
+
+        'FAILED (errors=1)'
+        'FAILED (failures=1)'
+        'FAILED (errors=1, failures=1)'
+
+    Returns
+    -------
+    nerr, nfail
+      number of errors and failures.
+    """
+
+    err_m = re.search(r'^FAILED \(errors=(\d+)\)', txt, re.MULTILINE)
+    if err_m:
+        nerr = int(err_m.group(1))
+        nfail = 0
+        return  nerr, nfail
+
+    fail_m = re.search(r'^FAILED \(failures=(\d+)\)', txt, re.MULTILINE)
+    if fail_m:
+        nerr = 0
+        nfail = int(fail_m.group(1))
+        return  nerr, nfail
+
+    both_m = re.search(r'^FAILED \(errors=(\d+), failures=(\d+)\)', txt,
+                       re.MULTILINE)
+    if both_m:
+        nerr = int(both_m.group(1))
+        nfail = int(both_m.group(2))
+        return  nerr, nfail
+
+    # If the input didn't match any of these forms, assume no error/failures
+    return 0, 0
+
+
+# So nose doesn't think this is a test
+parse_test_output.__test__ = False
+
+
+def default_argv():
+    """Return a valid default argv for creating testing instances of ipython"""
+
+    return ['--quick', # so no config file is loaded
+            # Other defaults to minimize side effects on stdout
+            '--colors=NoColor', '--no-term-title','--no-banner',
+            '--autocall=0']
+
+
+def default_config():
+    """Return a config object with good defaults for testing."""
+    config = Config()
+    config.TerminalInteractiveShell.colors = 'NoColor'
+    config.TerminalTerminalInteractiveShell.term_title = False,
+    config.TerminalInteractiveShell.autocall = 0
+    f = tempfile.NamedTemporaryFile(suffix=u'test_hist.sqlite', delete=False)
+    config.HistoryManager.hist_file = Path(f.name)
+    f.close()
+    config.HistoryManager.db_cache_size = 10000
+    return config
+
+
+def get_ipython_cmd(as_string=False):
+    """
+    Return appropriate IPython command line name. By default, this will return
+    a list that can be used with subprocess.Popen, for example, but passing
+    `as_string=True` allows for returning the IPython command as a string.
+
+    Parameters
+    ----------
+    as_string: bool
+        Flag to allow to return the command as a string.
+    """
+    ipython_cmd = [sys.executable, "-m", "IPython"]
+
+    if as_string:
+        ipython_cmd = " ".join(ipython_cmd)
+
+    return ipython_cmd
+
+def ipexec(fname, options=None, commands=()):
+    """Utility to call 'ipython filename'.
+
+    Starts IPython with a minimal and safe configuration to make startup as fast
+    as possible.
+
+    Note that this starts IPython in a subprocess!
+
+    Parameters
+    ----------
+    fname : str, Path
+      Name of file to be executed (should have .py or .ipy extension).
+
+    options : optional, list
+      Extra command-line flags to be passed to IPython.
+
+    commands : optional, list
+      Commands to send in on stdin
+
+    Returns
+    -------
+    ``(stdout, stderr)`` of ipython subprocess.
+    """
+    __tracebackhide__ = True
+
+    if options is None:
+        options = []
+
+    cmdargs = default_argv() + options
+
+    test_dir = os.path.dirname(__file__)
+
+    ipython_cmd = get_ipython_cmd()
+    # Absolute path for filename
+    full_fname = os.path.join(test_dir, fname)
+    full_cmd = ipython_cmd + cmdargs + ['--', full_fname]
+    env = os.environ.copy()
+    # FIXME: ignore all warnings in ipexec while we have shims
+    # should we keep suppressing warnings here, even after removing shims?
+    env['PYTHONWARNINGS'] = 'ignore'
+    # env.pop('PYTHONWARNINGS', None)  # Avoid extraneous warnings appearing on stderr
+    # Prevent coloring under PyCharm ("\x1b[0m" at the end of the stdout)
+    env.pop("PYCHARM_HOSTED", None)
+    for k, v in env.items():
+        # Debug a bizarre failure we've seen on Windows:
+        # TypeError: environment can only contain strings
+        if not isinstance(v, str):
+            print(k, v)
+    p = Popen(full_cmd, stdout=PIPE, stderr=PIPE, stdin=PIPE, env=env)
+    out, err = p.communicate(input=py3compat.encode('\n'.join(commands)) or None)
+    out, err = py3compat.decode(out), py3compat.decode(err)
+    # `import readline` causes 'ESC[?1034h' to be output sometimes,
+    # so strip that out before doing comparisons
+    if out:
+        out = re.sub(r'\x1b\[[^h]+h', '', out)
+    return out, err
+
+
+def ipexec_validate(fname, expected_out, expected_err='',
+                    options=None, commands=()):
+    """Utility to call 'ipython filename' and validate output/error.
+
+    This function raises an AssertionError if the validation fails.
+
+    Note that this starts IPython in a subprocess!
+
+    Parameters
+    ----------
+    fname : str, Path
+      Name of the file to be executed (should have .py or .ipy extension).
+
+    expected_out : str
+      Expected stdout of the process.
+
+    expected_err : optional, str
+      Expected stderr of the process.
+
+    options : optional, list
+      Extra command-line flags to be passed to IPython.
+
+    Returns
+    -------
+    None
+    """
+    __tracebackhide__ = True
+
+    out, err = ipexec(fname, options, commands)
+    #print 'OUT', out  # dbg
+    #print 'ERR', err  # dbg
+    # If there are any errors, we must check those before stdout, as they may be
+    # more informative than simply having an empty stdout.
+    if err:
+        if expected_err:
+            assert "\n".join(err.strip().splitlines()) == "\n".join(
+                expected_err.strip().splitlines()
+            )
+        else:
+            raise ValueError('Running file %r produced error: %r' %
+                             (fname, err))
+    # If no errors or output on stderr was expected, match stdout
+    assert "\n".join(out.strip().splitlines()) == "\n".join(
+        expected_out.strip().splitlines()
+    )
+
+
+class TempFileMixin(unittest.TestCase):
+    """Utility class to create temporary Python/IPython files.
+
+    Meant as a mixin class for test cases."""
+
+    def mktmp(self, src, ext='.py'):
+        """Make a valid python temp file."""
+        fname = temp_pyfile(src, ext)
+        if not hasattr(self, 'tmps'):
+            self.tmps=[]
+        self.tmps.append(fname)
+        self.fname = fname
+
+    def tearDown(self):
+        # If the tmpfile wasn't made because of skipped tests, like in
+        # win32, there's nothing to cleanup.
+        if hasattr(self, 'tmps'):
+            for fname in self.tmps:
+                # If the tmpfile wasn't made because of skipped tests, like in
+                # win32, there's nothing to cleanup.
+                try:
+                    os.unlink(fname)
+                except:
+                    # On Windows, even though we close the file, we still can't
+                    # delete it.  I have no clue why
+                    pass
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.tearDown()
+
+
+pair_fail_msg = ("Testing {0}\n\n"
+                "In:\n"
+                "  {1!r}\n"
+                "Expected:\n"
+                "  {2!r}\n"
+                "Got:\n"
+                "  {3!r}\n")
+def check_pairs(func, pairs):
+    """Utility function for the common case of checking a function with a
+    sequence of input/output pairs.
+
+    Parameters
+    ----------
+    func : callable
+      The function to be tested. Should accept a single argument.
+    pairs : iterable
+      A list of (input, expected_output) tuples.
+
+    Returns
+    -------
+    None. Raises an AssertionError if any output does not match the expected
+    value.
+    """
+    __tracebackhide__ = True
+
+    name = getattr(func, "func_name", getattr(func, "__name__", "<unknown>"))
+    for inp, expected in pairs:
+        out = func(inp)
+        assert out == expected, pair_fail_msg.format(name, inp, expected, out)
+
+
+MyStringIO = StringIO
+
+_re_type = type(re.compile(r''))
+
+notprinted_msg = """Did not find {0!r} in printed output (on {1}):
+-------
+{2!s}
+-------
+"""
+
+class AssertPrints(object):
+    """Context manager for testing that code prints certain text.
+
+    Examples
+    --------
+    >>> with AssertPrints("abc", suppress=False):
+    ...     print("abcd")
+    ...     print("def")
+    ...
+    abcd
+    def
+    """
+    def __init__(self, s, channel='stdout', suppress=True):
+        self.s = s
+        if isinstance(self.s, (str, _re_type)):
+            self.s = [self.s]
+        self.channel = channel
+        self.suppress = suppress
+
+    def __enter__(self):
+        self.orig_stream = getattr(sys, self.channel)
+        self.buffer = MyStringIO()
+        self.tee = Tee(self.buffer, channel=self.channel)
+        setattr(sys, self.channel, self.buffer if self.suppress else self.tee)
+
+    def __exit__(self, etype, value, traceback):
+        __tracebackhide__ = True
+
+        try:
+            if value is not None:
+                # If an error was raised, don't check anything else
+                return False
+            self.tee.flush()
+            setattr(sys, self.channel, self.orig_stream)
+            printed = self.buffer.getvalue()
+            for s in self.s:
+                if isinstance(s, _re_type):
+                    assert s.search(printed), notprinted_msg.format(s.pattern, self.channel, printed)
+                else:
+                    assert s in printed, notprinted_msg.format(s, self.channel, printed)
+            return False
+        finally:
+            self.tee.close()
+
+printed_msg = """Found {0!r} in printed output (on {1}):
+-------
+{2!s}
+-------
+"""
+
+class AssertNotPrints(AssertPrints):
+    """Context manager for checking that certain output *isn't* produced.
+
+    Counterpart of AssertPrints"""
+    def __exit__(self, etype, value, traceback):
+        __tracebackhide__ = True
+
+        try:
+            if value is not None:
+                # If an error was raised, don't check anything else
+                self.tee.close()
+                return False
+            self.tee.flush()
+            setattr(sys, self.channel, self.orig_stream)
+            printed = self.buffer.getvalue()
+            for s in self.s:
+                if isinstance(s, _re_type):
+                    assert not s.search(printed),printed_msg.format(
+                        s.pattern, self.channel, printed)
+                else:
+                    assert s not in printed, printed_msg.format(
+                        s, self.channel, printed)
+            return False
+        finally:
+            self.tee.close()
+
+@contextmanager
+def mute_warn():
+    from IPython.utils import warn
+    save_warn = warn.warn
+    warn.warn = lambda *a, **kw: None
+    try:
+        yield
+    finally:
+        warn.warn = save_warn
+
+@contextmanager
+def make_tempfile(name):
+    """Create an empty, named, temporary file for the duration of the context."""
+    open(name, "w", encoding="utf-8").close()
+    try:
+        yield
+    finally:
+        os.unlink(name)
+
+def fake_input(inputs):
+    """Temporarily replace the input() function to return the given values
+
+    Use as a context manager:
+
+    with fake_input(['result1', 'result2']):
+        ...
+
+    Values are returned in order. If input() is called again after the last value
+    was used, EOFError is raised.
+    """
+    it = iter(inputs)
+    def mock_input(prompt=''):
+        try:
+            return next(it)
+        except StopIteration as e:
+            raise EOFError('No more inputs given') from e
+
+    return patch('builtins.input', mock_input)
+
+def help_output_test(subcommand=''):
+    """test that `ipython [subcommand] -h` works"""
+    cmd = get_ipython_cmd() + [subcommand, '-h']
+    out, err, rc = get_output_error_code(cmd)
+    assert rc == 0, err
+    assert "Traceback" not in err
+    assert "Options" in out
+    assert "--help-all" in out
+    return out, err
+
+
+def help_all_output_test(subcommand=''):
+    """test that `ipython [subcommand] --help-all` works"""
+    cmd = get_ipython_cmd() + [subcommand, '--help-all']
+    out, err, rc = get_output_error_code(cmd)
+    assert rc == 0, err
+    assert "Traceback" not in err
+    assert "Options" in out
+    assert "Class" in out
+    return out, err
+