X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/eb6a4098a0f2e9ae55e72ad960b3dfc134d177c9..d14a1e28567de23c586bc80017073d0c39f8d18f:/wxPython/wx/py/tests/test_introspect.py

diff --git a/wxPython/wx/py/tests/test_introspect.py b/wxPython/wx/py/tests/test_introspect.py
new file mode 100644
index 0000000000..887b40c39e
--- /dev/null
+++ b/wxPython/wx/py/tests/test_introspect.py
@@ -0,0 +1,862 @@
+#!/usr/bin/env python
+
+__author__ = "Patrick K. O'Brien <pobrien@orbtech.com>"
+__cvsid__ = "$Id$"
+__revision__ = "$Revision$"[11:-2]
+
+import unittest
+
+# Import from this module's parent directory.
+import os
+import sys
+sys.path.insert(0, os.pardir)
+import introspect
+del sys.path[0]
+del sys
+del os
+
+
+"""
+These unittest methods are preferred:
+-------------------------------------
+self.assert_(expr, msg=None)
+self.assertEqual(first, second, msg=None)
+self.assertRaises(excClass, callableObj, *args, **kwargs)
+self.fail(msg=None)
+self.failIf(expr, msg=None)
+"""
+
+
+class ModuleTestCase(unittest.TestCase):
+
+    def test_module(self):
+        module = introspect
+        self.assert_(module.__author__)
+        self.assert_(module.__cvsid__)
+        self.assert_(module.__revision__)
+        self.assert_(module.getAllAttributeNames)
+        self.assert_(module.getAttributeNames)
+        self.assert_(module.getAutoCompleteList)
+        self.assert_(module.getBaseObject)
+        self.assert_(module.getCallTip)
+        self.assert_(module.getConstructor)
+        self.assert_(module.getRoot)
+        self.assert_(module.rtrimTerminus)
+
+
+class RtrimTerminusTestCase(unittest.TestCase):
+
+    def test_rtrimTerminus(self):
+        values = (
+            ('', '', ''),
+            ('', None, ''),
+            ('', '.', ''),
+            ('', '(', ''),
+            
+            ('.', '', '.'),
+            ('.', None, '.'),
+            ('.', '.', '.'),
+            ('.', '(', '.'),
+            
+            ('(', '', '('),
+            ('(', None, '('),
+            ('(', '.', '('),
+            ('(', '(', '('),
+            
+            ('spam', '', 'spam'),
+            ('spam', None, 'spam'),
+            ('spam', '.', 'spam'),
+            ('spam', '(', 'spam'),
+            
+            ('spam.', '', 'spam.'),
+            ('spam.', None, 'spam.'),
+            ('spam.', '.', 'spam.'),
+            ('spam.', '(', 'spam.'),
+            
+            ('spam(', '', 'spam('),
+            ('spam(', None, 'spam('),
+            ('spam(', '.', 'spam('),
+            ('spam(', '(', 'spam('),
+            
+            ('spam.eggs', '.', 'spam.'),
+            ('spam.eggs.', '.', 'spam.eggs.'),
+            ('spam.eggs(', '(', 'spam.eggs('),
+            ('spam.eggs.', '(', 'spam.eggs.'),
+            ('spam.eggs(', '.', 'spam.'),
+            
+            ('x = spam.', '.', 'x = spam.'),
+            ('x = spam.eggs', '.', 'x = spam.'),
+            ('x = spam.eggs.', '.', 'x = spam.eggs.'),
+            ('x = spam.eggs(', '(', 'x = spam.eggs('),
+        )
+        for input, terminator, output in values:
+            result = introspect.rtrimTerminus(input, terminator)
+            self.assertEqual(result, output,
+                             ':in: %r :t: %r :out: %r :result: %r' %
+                             (input, terminator, output, result))
+
+
+class GetRootTestCase(unittest.TestCase):
+
+    def _checkRoot(self, input, terminator, output):
+        root = introspect.getRoot(command=input, terminator=terminator)
+        self.assertEqual(root, output,
+                         ':in: %r :t: %r :out: %r :root: %r' %
+                         (input, terminator, output, root))
+
+    def test_getRoot(self):
+        values = (
+            ('', '', ''),
+            ('', None, ''),
+            ('', '.', ''),
+            ('', '(', ''),
+            
+            ('.', '', '.'),
+            ('.', None, '.'),
+            ('.', '.', ''),
+            ('.', '(', '.'),
+            
+            ('(', '', ''),
+            ('(', None, ''),
+            ('(', '.', ''),
+            ('(', '(', ''),
+            
+            ('spam', '', 'spam'),
+            ('spam', None, 'spam'),
+            ('spam', '.', ''),
+            ('spam', '(', 'spam'),
+            
+            ('spam.', '', 'spam.'),
+            ('spam.', None, 'spam.'),
+            ('spam.', '.', 'spam'),
+            ('spam.', '(', 'spam.'),
+            
+            ('spam(', '', ''),
+            ('spam(', None, ''),
+            ('spam(', '.', ''),
+            ('spam(', '(', 'spam'),
+            
+            ('spam.eggs', '.', 'spam'),
+            ('spam.eggs.', '.', 'spam.eggs'),
+            ('spam.eggs(', '(', 'spam.eggs'),
+            ('spam.eggs.', '(', 'spam.eggs.'),
+            ('spam.eggs(', '.', 'spam'),
+            
+            ('x = spam.', '.', 'spam'),
+            ('x = spam.eggs', '.', 'spam'),
+            ('x = spam.eggs.', '.', 'spam.eggs'),
+            ('x = spam.eggs(', '(', 'spam.eggs'),
+
+            ('for n in range(3):\n    d.', '.', 'd'),
+            ('for n in range(3):\n...    d.', '.', 'd'),
+        )
+        for input, terminator, output in values:
+            self._checkRoot(input, terminator, output)
+
+    def test_getRoot_Advanced(self):
+        values = (
+            ('spam_', '', 'spam_'),
+            ('spam_', None, 'spam_'),
+            ('spam_', '.', ''),
+            ('spam_', '(', 'spam_'),
+            
+            ('_spam', '', '_spam'),
+            ('_spam', None, '_spam'),
+            ('_spam', '.', ''),
+            ('_spam', '(', '_spam'),
+            
+            ('spam_eggs', '', 'spam_eggs'),
+            ('spam_eggs', None, 'spam_eggs'),
+            ('spam_eggs', '.', ''),
+            ('spam_eggs', '(', 'spam_eggs'),
+            
+            ('spam123', '', 'spam123'),
+            ('spam123', None, 'spam123'),
+            ('spam123', '.', ''),
+            ('spam123', '(', 'spam123'),
+
+            ('spam_123', '', 'spam_123'),
+            ('spam_123', None, 'spam_123'),
+            ('spam_123', '.', ''),
+            ('spam_123', '(', 'spam_123'),
+        )
+        for input, terminator, output in values:
+            self._checkRoot(input, terminator, output)
+
+## The original intent was to detect when we were inside a string.
+## That has proven to be very difficult, for little benefit.
+## The fact that autocomplete or calltips might be triggered inside
+## a string is not a big deal. Sometimes it is even helpful.
+
+##    def test_getRoot_InsideStrings(self):
+##        values = (
+##            ('x = ".', '.', ''),
+##            ("x = '.", '.', ''),
+##            ('x = """.', '.', ''),
+##            ("x = '''.", '.', ''),
+##
+##            ('x = "(', '(', ''),
+##            ("x = '(", '(', ''),
+##            ('x = """(', '(', ''),
+##            ("x = '''(", '(', ''),
+##
+##            ('x = "spam', '.', ''),
+##            ('x = "spam.', '.', ''),
+##            ("x = 'spam.", '.', ''),
+##            ('x = """spam.', '.', ''),
+##            ("x = '''spam.", '.', ''),
+##            
+##            ('x = "spam', '(', ''),
+##            ('x = "spam(', '(', ''),
+##            ("x = 'spam(", '(', ''),
+##            ('x = """spam(', '(', ''),
+##            ("x = '''spam(", '(', ''),
+##            
+##            ('x = "spam.eggs.', '.', ''),
+##            ("x = 'spam.eggs.", '.', ''),
+##            ('x = """spam.eggs.', '.', ''),
+##            ("x = '''spam.eggs.", '.', ''),
+##            
+##            ('x = "spam.eggs(', '(', ''),
+##            ("x = 'spam.eggs(", '(', ''),
+##            ('x = """spam.eggs(', '(', ''),
+##            ("x = '''spam.eggs(", '(', ''),
+##        )
+##        for input, terminator, output in values:
+##            self._checkRoot(input, terminator, output)
+
+    def test_getRoot_EmptyTypes(self):
+        values = (
+            ("''.", '.', "''"),
+            ('"".', '.', '""'),
+            ('"""""".', '.', '""""""'),
+            ("''''''.", '.', "''''''"),
+
+            ('[].', '.', '[]'),
+            ('().', '.', '()'),
+            ('{}.', '.', '{}'),
+            
+            ('[](', '(', '[]'),
+            ('()(', '(', '()'),
+            ('{}(', '(', '{}'),
+            
+            ("x = ''.", '.', "''"),
+            ('x = "".', '.', '""'),
+            ('x = """""".', '.', '""""""'),
+            ("x = ''''''.", '.', "''''''"),
+
+            ('x = [].', '.', '[]'),
+            ('x = ().', '.', '()'),
+            ('x = {}.', '.', '{}'),
+            
+            ('x = [](', '(', '[]'),
+            ('x = ()(', '(', '()'),
+            ('x = {}(', '(', '{}'),
+
+            ('print [].', '.', '[]'),
+            ('print ().', '.', '()'),
+            ('print {}.', '.', '{}'),
+            
+            ('print [](', '(', '[]'),
+            ('print ()(', '(', '()'),
+            ('print {}(', '(', '{}'),
+
+            ("''.attr.", '.', "''.attr"),
+            ('"".attr.', '.', '"".attr'),
+            ('"""""".attr.', '.', '"""""".attr'),
+            ("''''''.attr.", '.', "''''''.attr"),
+
+            ('[].attr.', '.', '[].attr'),
+            ('().attr.', '.', '().attr'),
+            ('{}.attr.', '.', '{}.attr'),
+            
+            ('[].attr(', '(', '[].attr'),
+            ('().attr(', '(', '().attr'),
+            ('{}.attr(', '(', '{}.attr'),
+
+            ('spam().', '.', ''),
+            ('spam_().', '.', ''),
+            ('spam5().', '.', ''),
+            ('spam[]().', '.', ''),
+            ('spam()[].', '.', ''),
+            ('spam[]{}.', '.', ''),
+
+            ("spam(''.", '.', "''"),
+            ('spam("".', '.', '""'),
+            ('spam("""""".', '.', '""""""'),
+            ("spam(''''''.", '.', "''''''"),
+
+            ('spam([].', '.', '[]'),
+            ('spam(().', '.', '()'),
+            ('spam({}.', '.', '{}'),
+            ('spam[[].', '.', '[]'),
+            ('spam[().', '.', '()'),
+            ('spam[{}.', '.', '{}'),
+            ('x = {[].', '.', '[]'),
+            ('x = {().', '.', '()'),
+            ('x = {{}.', '.', '{}'),
+
+            ('spam,[].', '.', '[]'),
+            ('spam+[].', '.', '[]'),
+            ('spam-[].', '.', '[]'),
+            ('spam*[].', '.', '[]'),
+            ('spam/[].', '.', '[]'),
+            ('spam=[].', '.', '[]'),
+            ('spam%[].', '.', '[]'),
+            ('spam<[].', '.', '[]'),
+            ('spam>[].', '.', '[]'),
+            ('spam&[].', '.', '[]'),
+            ('spam|[].', '.', '[]'),
+            ('spam^[].', '.', '[]'),
+            ('spam~[].', '.', '[]'),
+            ('spam:[].', '.', '[]'),
+
+            ('spam,().', '.', '()'),
+            ('spam+().', '.', '()'),
+            ('spam-().', '.', '()'),
+            ('spam*().', '.', '()'),
+            ('spam/().', '.', '()'),
+            ('spam=().', '.', '()'),
+            ('spam%().', '.', '()'),
+            ('spam<().', '.', '()'),
+            ('spam>().', '.', '()'),
+            ('spam&().', '.', '()'),
+            ('spam|().', '.', '()'),
+            ('spam^().', '.', '()'),
+            ('spam~().', '.', '()'),
+            ('spam:().', '.', '()'),
+
+            ('spam,{}.', '.', '{}'),
+            ('spam+{}.', '.', '{}'),
+            ('spam-{}.', '.', '{}'),
+            ('spam*{}.', '.', '{}'),
+            ('spam/{}.', '.', '{}'),
+            ('spam={}.', '.', '{}'),
+            ('spam%{}.', '.', '{}'),
+            ('spam<{}.', '.', '{}'),
+            ('spam>{}.', '.', '{}'),
+            ('spam&{}.', '.', '{}'),
+            ('spam|{}.', '.', '{}'),
+            ('spam^{}.', '.', '{}'),
+            ('spam~{}.', '.', '{}'),
+            ('spam:{}.', '.', '{}'),
+        )
+        for input, terminator, output in values:
+            self._checkRoot(input, terminator, output)
+
+
+# Support for GetBaseObjectTestCase and GetAttributeNamesTestCase.
+
+class Foo:
+    def __init__(self):
+        pass
+
+    def __del__(self):
+        pass
+
+    def _private(self):
+        pass
+
+class Bar:
+    pass
+
+class Spam:
+    def __call__(self):
+        pass
+
+    def foo(self):
+        pass
+
+    def bar(spam):
+        # It shouldn't matter what we call "self".
+        pass
+
+    def eggs(self):
+        pass
+
+def ham(eggs):
+    pass
+
+class GetBaseObjectTestCase(unittest.TestCase):
+
+    def test_getBaseObject(self):
+        spam = Spam()
+        eggs = Spam.eggs
+        listappend = [].append
+        spamda = lambda: None
+        values = (
+            ('spam', 'spam', 0),
+            (123, 123, 0),
+            (12.3, 12.3, 0),
+            ([], [], 0),
+            ((), (), 0),
+            ({}, {}, 0),
+            # Builtin function.
+            (len, len, 0),
+            # Builtin method.
+            (listappend, listappend, 0),
+            # User function.
+            (ham, ham, 0),
+            # Byte-compiled code.
+            (ham.func_code, ham.func_code, 0),
+            # Lambda.
+            (spamda, spamda, 0),
+            # Class with init.
+            (Foo, Foo.__init__.im_func, 1),
+            # Class with no init.
+            (Bar, Bar, 0),
+            # Bound method.
+            (spam.foo, spam.foo.im_func, 1),
+            # Bound method with self named something else (spam).
+            (spam.bar, spam.bar.im_func, 1),
+            # Unbound method. (Do not drop the self argument.)
+            (eggs, eggs.im_func, 0),
+            # Callable instance.
+            (spam, spam.__call__.im_func, 1),
+        )
+        for object, baseObject, dropSelf in values:
+            result = introspect.getBaseObject(object)
+            self.assertEqual(result, (baseObject, dropSelf))
+
+
+class GetAttributeTestCase(unittest.TestCase):
+    """Base class for other test case classes."""
+
+    def setUp(self):
+        self.values = (
+            '__abs__',
+            '__add__',
+            '__and__',
+            '__base__',
+            '__bases__',
+            '__basicsize__',
+            '__builtins__',
+            '__call__',
+            '__class__',
+            '__cmp__',
+            '__coerce__',
+            '__contains__',
+            '__del__',
+            '__delattr__',
+            '__delitem__',
+            '__delslice__',
+            '__dict__',
+            '__dictoffset__',
+            '__div__',
+            '__divmod__',
+            '__doc__',
+            '__eq__',
+            '__file__',
+            '__flags__',
+            '__float__',
+            '__floordiv__',
+            '__ge__',
+            '__get__',
+            '__getattr__',
+            '__getattribute__',
+            '__getitem__',
+            '__getslice__',
+            '__gt__',
+            '__hash__',
+            '__hex__',
+            '__iadd__',
+            '__imul__',
+            '__init__',
+            '__int__',
+            '__invert__',
+            '__itemsize__',
+            '__iter__',
+            '__le__',
+            '__len__',
+            '__long__',
+            '__lshift__',
+            '__lt__',
+            '__mod__',
+            '__module__',
+            '__mro__',
+            '__mul__',
+            '__name__',
+            '__ne__',
+            '__neg__',
+            '__new__',
+            '__nonzero__',
+            '__oct__',
+            '__or__',
+            '__path__',
+            '__pos__',
+            '__pow__',
+            '__radd__',
+            '__rand__',
+            '__rdiv__',
+            '__rdivmod__',
+            '__reduce__',
+            '__repr__',
+            '__rfloordiv__',
+            '__rlshift__',
+            '__rmod__',
+            '__rmul__',
+            '__ror__',
+            '__rpow__',
+            '__rrshift__',
+            '__rshift__',
+            '__rsub__',
+            '__rtruediv__',
+            '__rxor__',
+            '__self__',
+            '__setattr__',
+            '__setitem__',
+            '__setslice__',
+            '__str__',
+            '__sub__',
+            '__subclasses__',
+            '__truediv__',
+            '__warningregistry__',
+            '__weakrefoffset__',
+            '__xor__',
+            'append',
+            'capitalize',
+            'center',
+            'clear',
+            'close',
+            'closed',
+            'co_argcount',
+            'co_cellvars',
+            'co_code',
+            'co_consts',
+            'co_filename',
+            'co_firstlineno',
+            'co_flags',
+            'co_freevars',
+            'co_lnotab',
+            'co_name',
+            'co_names',
+            'co_nlocals',
+            'co_stacksize',
+            'co_varnames',
+            'conjugate',
+            'copy',
+            'count',
+            'decode',
+            'encode',
+            'endswith',
+            'expandtabs',
+            'extend',
+            'fileno',
+            'find',
+            'flush',
+            'func_closure',
+            'func_code',
+            'func_defaults',
+            'func_dict',
+            'func_doc',
+            'func_globals',
+            'func_name',
+            'get',
+            'has_key',
+            'im_class',
+            'im_func',
+            'im_self',
+            'imag',
+            'index',
+            'insert',
+            'isalnum',
+            'isalpha',
+            'isatty',
+            'isdigit',
+            'islower',
+            'isspace',
+            'istitle',
+            'isupper',
+            'items',
+            'iteritems',
+            'iterkeys',
+            'itervalues',
+            'join',
+            'keys',
+            'ljust',
+            'lower',
+            'lstrip',
+            'mode',
+            'mro',
+            'name',
+            'pop',
+            'popitem',
+            'real',
+            'read',
+            'readinto',
+            'readline',
+            'readlines',
+            'remove',
+            'replace',
+            'reverse',
+            'rfind',
+            'rindex',
+            'rjust',
+            'rstrip',
+            'seek',
+            'setdefault',
+            'softspace',
+            'sort',
+            'split',
+            'splitlines',
+            'start',
+            'startswith',
+            'step',
+            'stop',
+            'strip',
+            'swapcase',
+            'tell',
+            'title',
+            'tolist',
+            'translate',
+            'truncate',
+            'update',
+            'upper',
+            'values',
+            'write',
+            'writelines',
+            'xreadlines',
+        )
+
+# Since getAllAttributeNames() calls str(object),
+# we need to test for a broken __str__ method.
+class BrokenStr:
+    def __str__(self):
+        raise Exception
+    
+brokenStr = BrokenStr()
+
+class GetAttributeNamesTestCase(GetAttributeTestCase):
+
+    def setUp(self):
+        GetAttributeTestCase.setUp(self)
+        import PyCrust
+        spam = Spam()
+        self.f = open('test_introspect.py')
+        self.items = (
+            None,
+            int(123),
+            long(123),
+            float(123),
+            complex(123),
+            "",
+            unicode(""),
+            [],
+            (),
+            xrange(0),
+            {},
+            # Builtin function.
+            len,
+            # Builtin method.
+            [].append,
+            # User function.
+            ham,
+            # Byte-compiled code.
+            ham.func_code,
+            # Lambda.
+            lambda: None,
+            # Class with no init.
+            Bar,
+            # Instance with no init.
+            Bar(),
+            # Class with init and del.
+            Foo,
+            # Instance with init and del.
+            Foo(),
+            # Bound method.
+            spam.foo,
+            # Unbound method.
+            Spam.eggs,
+            # Callable instance.
+            spam,
+            # Module.
+            introspect,
+            # Package.
+            PyCrust,
+            # Buffer.
+            buffer(''),
+            # File.
+            self.f,
+            # Slice.
+            slice(0),
+            # Ellipsis.
+            Ellipsis,
+            # BrokenStr class.
+            BrokenStr,
+            # BrokenStr instance.
+            brokenStr,
+        )
+
+    def tearDown(self):
+        self.items = None
+        self.f.close()
+
+    def test_getAttributeNames(self):
+        for item in self.items:
+            self._checkAttributeNames(item)
+        if __builtins__.has_key('object'):
+            self._checkAttributeNames(object)
+
+    def test_getAttributeNames_NoSingle(self):
+        for item in self.items:
+            result = introspect.getAttributeNames(item, includeSingle=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[0] != '_' or attribute[:2] == '__']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+    def test_getAttributeNames_NoDouble(self):
+        for item in self.items:
+            result = introspect.getAttributeNames(item, includeDouble=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[:2] != '__']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+    def test_getAttributeNames_NoSingleOrDouble(self):
+        for item in self.items:
+            result = introspect.getAttributeNames(item, includeSingle=0, 
+                                                  includeDouble=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[0] != '_']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+    def _checkAttributeNames(self, item):
+        result = introspect.getAttributeNames(item)
+        attributes = [attribute for attribute in self.values \
+                      if hasattr(item, attribute)]
+        for attribute in attributes:
+            self.assert_(attribute in result, 
+                         ':item: %r :attribute: %r' % (item, attribute))
+
+
+class GetAutoCompleteListTestCase(GetAttributeTestCase):
+
+    def setUp(self):
+        GetAttributeTestCase.setUp(self)
+        self.items = (
+            'None.',
+            '123 .',
+            '"".',
+            '[].',
+            '().',
+            '{}.',
+            # Builtin function.
+            'len.',
+            # Builtin method.
+            '[].append.',
+        )
+
+    def test_getAutoCompleteList(self):
+        for item in self.items:
+            result = introspect.getAutoCompleteList(item)
+            object = eval(item[:-1])
+            attributes = [attribute for attribute in self.values \
+                          if hasattr(object, attribute)]
+            for attribute in attributes:
+                self.assert_(attribute in result, 
+                             ':item: %r :attribute: %r' % (item, attribute))
+
+    def test_getAutoCompleteList_NoSingle(self):
+        for item in self.items:
+            result = introspect.getAutoCompleteList(item, includeSingle=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[0] != '_' or attribute[:2] == '__']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+    def test_getAutoCompleteList_NoDouble(self):
+        for item in self.items:
+            result = introspect.getAutoCompleteList(item, includeDouble=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[:2] != '__']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+    def test_getAutoCompleteList_NoSingleOrDouble(self):
+        for item in self.items:
+            result = introspect.getAutoCompleteList(item, includeSingle=0, 
+                                                    includeDouble=0)
+            attributes = [attribute for attribute in result \
+                          if attribute[0] != '_']
+            self.assertEqual(result, attributes, 
+                             ':item: %r' % (item,))
+
+
+# Support for GetConstructorTestCase.
+
+class A1:
+    def __init__(self, a):
+        self.a = a
+
+class B1(A1):
+    def __init__(self, b):
+        self.b = b
+
+class C1(A1):
+    pass
+
+class D1(C1, B1):
+    pass
+
+if __builtins__.has_key('object'):
+    class A2(object):
+        def __init__(self, a):
+            self.a = a
+
+    class B2(A2):
+        def __init__(self, b):
+            self.b = b
+
+    class C2(A2):
+        pass
+
+    class D2(C2, B2):
+        pass
+    
+class N:
+    pass
+
+class O:
+    def __init__(self, a, b=2, *args, **kwargs):
+        pass
+
+class P(O):
+    pass
+
+class Q(P):
+    def __init__(self, c, d=4):
+        pass
+
+class GetConstructorTestCase(unittest.TestCase):
+
+    def test_getConstructor(self):
+        args = ('self', 'a', 'b', 'args', 'kwargs')
+        varnames = introspect.getConstructor(O).func_code.co_varnames
+        self.assertEqual(varnames, args)
+        varnames = introspect.getConstructor(P).func_code.co_varnames
+        self.assertEqual(varnames, args)
+        args = ('self', 'c', 'd')
+        varnames = introspect.getConstructor(Q).func_code.co_varnames
+        self.assertEqual(varnames, args)
+
+    def test_getConstructor_None(self):
+        values = (N, 1, 'spam', {}, [], (), dir)
+        for value in values:
+            self.assertEqual(introspect.getConstructor(N), None)
+
+    def test_getConstructor_MultipleInheritance(self):
+        # Test old style inheritance rules.
+        args = ('self', 'a')
+        varnames = introspect.getConstructor(D1).func_code.co_varnames
+        self.assertEqual(varnames, args)
+        if __builtins__.has_key('object'):
+            # Test new style inheritance rules as well.
+            args = ('self', 'b')
+            varnames = introspect.getConstructor(D2).func_code.co_varnames
+            self.assertEqual(varnames, args)
+
+
+if __name__ == '__main__':
+    unittest.main()