Add failing test for gh-1914

IPython/core/tests/test_oinspect.py

@@ -1,285 +1,290 b''
 """Tests for the object inspection functionality.
 """
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2010-2011 The IPython Development Team.
 #
 #  Distributed under the terms of the BSD License.
 #
 #  The full license is in the file COPYING.txt, distributed with this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from __future__ import print_function
 
 # Stdlib imports
 import os
 import re
 
 # Third-party imports
 import nose.tools as nt
 
 # Our own imports
 from .. import oinspect
 from IPython.core.magic import (Magics, magics_class, line_magic,
                                 cell_magic, line_cell_magic,
                                 register_line_magic, register_cell_magic,
                                 register_line_cell_magic)
 from IPython.external.decorator import decorator
 from IPython.utils import py3compat
 
 
 #-----------------------------------------------------------------------------
 # Globals and constants
 #-----------------------------------------------------------------------------
 
 inspector = oinspect.Inspector()
 ip = get_ipython()
 
 #-----------------------------------------------------------------------------
 # Local utilities
 #-----------------------------------------------------------------------------
 
 # WARNING: since this test checks the line number where a function is
 # defined, if any code is inserted above, the following line will need to be
 # updated.  Do NOT insert any whitespace between the next line and the function
 # definition below.
 THIS_LINE_NUMBER = 48  # Put here the actual number of this line
 def test_find_source_lines():
     nt.assert_equal(oinspect.find_source_lines(test_find_source_lines), 
                     THIS_LINE_NUMBER+1)
 
 
 # A couple of utilities to ensure these tests work the same from a source or a
 # binary install
 def pyfile(fname):
     return re.sub('.py[co]$', '.py', fname)
 
 
 def match_pyfiles(f1, f2):
     nt.assert_equal(pyfile(f1), pyfile(f2))
 
 
 def test_find_file():
     match_pyfiles(oinspect.find_file(test_find_file), os.path.abspath(__file__))
 
 
 def test_find_file_decorated1():
 
     @decorator
     def noop1(f):
         def wrapper():
             return f(*a, **kw)
         return wrapper
 
     @noop1
     def f(x):
         "My docstring"
     
     match_pyfiles(oinspect.find_file(f), os.path.abspath(__file__))
     nt.assert_equal(f.__doc__, "My docstring")
 
 
 def test_find_file_decorated2():
 
     @decorator
     def noop2(f, *a, **kw):
         return f(*a, **kw)
 
     @noop2
     def f(x):
         "My docstring 2"
     
     match_pyfiles(oinspect.find_file(f), os.path.abspath(__file__))
     nt.assert_equal(f.__doc__, "My docstring 2")
     
 
 def test_find_file_magic():
     run = ip.find_line_magic('run')
     nt.assert_not_equal(oinspect.find_file(run), None)
 
 
 # A few generic objects we can then inspect in the tests below
 
 class Call(object):
     """This is the class docstring."""
 
     def __init__(self, x, y=1):
         """This is the constructor docstring."""
 
     def __call__(self, *a, **kw):
         """This is the call docstring."""
 
     def method(self, x, z=2):
         """Some method's docstring"""
 
 
 class OldStyle:
     """An old-style class for testing."""
     pass
 
 
 def f(x, y=2, *a, **kw):
     """A simple function."""
 
 
 def g(y, z=3, *a, **kw):
     pass  # no docstring
 
 
 @register_line_magic
 def lmagic(line):
     "A line magic"
 
 
 @register_cell_magic
 def cmagic(line, cell):
     "A cell magic"
 
 
 @register_line_cell_magic
 def lcmagic(line, cell=None):
     "A line/cell magic"
 
 
 @magics_class
 class SimpleMagics(Magics):
     @line_magic
     def Clmagic(self, cline):
         "A class-based line magic"
         
     @cell_magic
     def Ccmagic(self, cline, ccell):
         "A class-based cell magic"
         
     @line_cell_magic
     def Clcmagic(self, cline, ccell=None):
         "A class-based line/cell magic"
 
 
 def check_calltip(obj, name, call, docstring):
     """Generic check pattern all calltip tests will use"""
     info = inspector.info(obj, name)
     call_line, ds = oinspect.call_tip(info)
     nt.assert_equal(call_line, call)
     nt.assert_equal(ds, docstring)
 
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
 
 def test_calltip_class():
     check_calltip(Call, 'Call', 'Call(x, y=1)', Call.__init__.__doc__)
 
 
 def test_calltip_instance():
     c = Call(1)
     check_calltip(c, 'c', 'c(*a, **kw)', c.__call__.__doc__)
 
 
 def test_calltip_method():
     c = Call(1)
     check_calltip(c.method, 'c.method', 'c.method(x, z=2)', c.method.__doc__)
 
 
 def test_calltip_function():
     check_calltip(f, 'f', 'f(x, y=2, *a, **kw)', f.__doc__)
 
 
 def test_calltip_function2():
     check_calltip(g, 'g', 'g(y, z=3, *a, **kw)', '<no docstring>')
 
 
 def test_calltip_builtin():
     check_calltip(sum, 'sum', None, sum.__doc__)
 
 
 def test_calltip_line_magic():
     check_calltip(lmagic, 'lmagic', 'lmagic(line)', "A line magic")
 
         
 def test_calltip_cell_magic():
     check_calltip(cmagic, 'cmagic', 'cmagic(line, cell)', "A cell magic")
 
         
 def test_calltip_line_magic():
     check_calltip(lcmagic, 'lcmagic', 'lcmagic(line, cell=None)', 
                   "A line/cell magic")
         
 
 def test_class_magics():
     cm = SimpleMagics(ip)
     ip.register_magics(cm)
     check_calltip(cm.Clmagic, 'Clmagic', 'Clmagic(cline)',
                   "A class-based line magic")
     check_calltip(cm.Ccmagic, 'Ccmagic', 'Ccmagic(cline, ccell)',
                   "A class-based cell magic")
     check_calltip(cm.Clcmagic, 'Clcmagic', 'Clcmagic(cline, ccell=None)',
                   "A class-based line/cell magic")
     
 
 def test_info():
     "Check that Inspector.info fills out various fields as expected."
     i = inspector.info(Call, oname='Call')
     nt.assert_equal(i['type_name'], 'type')
     expted_class = str(type(type))  # <class 'type'> (Python 3) or <type 'type'>
     nt.assert_equal(i['base_class'], expted_class)
     nt.assert_equal(i['string_form'], "<class 'IPython.core.tests.test_oinspect.Call'>")
     fname = __file__
     if fname.endswith(".pyc"):
         fname = fname[:-1]
     # case-insensitive comparison needed on some filesystems
     # e.g. Windows:
     nt.assert_equal(i['file'].lower(), fname.lower())
     nt.assert_equal(i['definition'], 'Call(self, *a, **kw)\n')
     nt.assert_equal(i['docstring'], Call.__doc__)
     nt.assert_equal(i['source'], None)
     nt.assert_true(i['isclass'])
     nt.assert_equal(i['init_definition'], "Call(self, x, y=1)\n")
     nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
 
     i = inspector.info(Call, detail_level=1)
     nt.assert_not_equal(i['source'], None)
     nt.assert_equal(i['docstring'], None)
 
     c = Call(1)
     c.__doc__ = "Modified instance docstring"
     i = inspector.info(c)
     nt.assert_equal(i['type_name'], 'Call')
     nt.assert_equal(i['docstring'], "Modified instance docstring")
     nt.assert_equal(i['class_docstring'], Call.__doc__)
     nt.assert_equal(i['init_docstring'], Call.__init__.__doc__)
     nt.assert_equal(i['call_docstring'], c.__call__.__doc__)
 
     # Test old-style classes, which for example may not have an __init__ method.
     if not py3compat.PY3:
         i = inspector.info(OldStyle)
         nt.assert_equal(i['type_name'], 'classobj')
 
         i = inspector.info(OldStyle())
         nt.assert_equal(i['type_name'], 'instance')
         nt.assert_equal(i['docstring'], OldStyle.__doc__)
 
 def test_getdoc():
     class A(object):
         """standard docstring"""
         pass
     
     class B(object):
         """standard docstring"""
         def getdoc(self):
             return "custom docstring"
     
     class C(object):
         """standard docstring"""
         def getdoc(self):
             return None
     
     a = A()
     b = B()
     c = C()
     
     nt.assert_equal(oinspect.getdoc(a), "standard docstring")
     nt.assert_equal(oinspect.getdoc(b), "custom docstring")
     nt.assert_equal(oinspect.getdoc(c), "standard docstring")
+
+def test_pdef():
+    # See gh-1914
+    def foo(): pass
+    inspector.pdef(foo, 'foo')