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python3.2  3.2.2
Public Member Functions
importlib.test.extension.test_finder.FinderTests Class Reference
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List of all members.

Public Member Functions

def find_module
def test_module
def test_package
def test_module_in_package
def test_package_in_package
def test_package_over_module
def test_failure
def __new__
def register
def __instancecheck__
def __subclasscheck__

Detailed Description

Test the finder for extension modules.

Definition at line 7 of file test_finder.py.


Member Function Documentation

def abc.ABCMeta.__instancecheck__ (   cls,
  instance 
) [inherited]
Override for isinstance(instance, cls).

Definition at line 158 of file abc.py.

00158 
00159     def __instancecheck__(cls, instance):
00160         """Override for isinstance(instance, cls)."""
00161         # Inline the cache checking
00162         subclass = instance.__class__
00163         if subclass in cls._abc_cache:
00164             return True
00165         subtype = type(instance)
00166         if subtype is subclass:
00167             if (cls._abc_negative_cache_version ==
00168                 ABCMeta._abc_invalidation_counter and
00169                 subclass in cls._abc_negative_cache):
00170                 return False
00171             # Fall back to the subclass check.
00172             return cls.__subclasscheck__(subclass)
00173         return any(cls.__subclasscheck__(c) for c in {subclass, subtype})

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def abc.ABCMeta.__new__ (   mcls,
  name,
  bases,
  namespace 
) [inherited]

Definition at line 116 of file abc.py.

00116 
00117     def __new__(mcls, name, bases, namespace):
00118         cls = super().__new__(mcls, name, bases, namespace)
00119         # Compute set of abstract method names
00120         abstracts = {name
00121                      for name, value in namespace.items()
00122                      if getattr(value, "__isabstractmethod__", False)}
00123         for base in bases:
00124             for name in getattr(base, "__abstractmethods__", set()):
00125                 value = getattr(cls, name, None)
00126                 if getattr(value, "__isabstractmethod__", False):
00127                     abstracts.add(name)
00128         cls.__abstractmethods__ = frozenset(abstracts)
00129         # Set up inheritance registry
00130         cls._abc_registry = WeakSet()
00131         cls._abc_cache = WeakSet()
00132         cls._abc_negative_cache = WeakSet()
00133         cls._abc_negative_cache_version = ABCMeta._abc_invalidation_counter
00134         return cls

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def abc.ABCMeta.__subclasscheck__ (   cls,
  subclass 
) [inherited]
Override for issubclass(subclass, cls).

Definition at line 174 of file abc.py.

00174 
00175     def __subclasscheck__(cls, subclass):
00176         """Override for issubclass(subclass, cls)."""
00177         # Check cache
00178         if subclass in cls._abc_cache:
00179             return True
00180         # Check negative cache; may have to invalidate
00181         if cls._abc_negative_cache_version < ABCMeta._abc_invalidation_counter:
00182             # Invalidate the negative cache
00183             cls._abc_negative_cache = WeakSet()
00184             cls._abc_negative_cache_version = ABCMeta._abc_invalidation_counter
00185         elif subclass in cls._abc_negative_cache:
00186             return False
00187         # Check the subclass hook
00188         ok = cls.__subclasshook__(subclass)
00189         if ok is not NotImplemented:
00190             assert isinstance(ok, bool)
00191             if ok:
00192                 cls._abc_cache.add(subclass)
00193             else:
00194                 cls._abc_negative_cache.add(subclass)
00195             return ok
00196         # Check if it's a direct subclass
00197         if cls in getattr(subclass, '__mro__', ()):
00198             cls._abc_cache.add(subclass)
00199             return True
00200         # Check if it's a subclass of a registered class (recursive)
00201         for rcls in cls._abc_registry:
00202             if issubclass(subclass, rcls):
00203                 cls._abc_cache.add(subclass)
00204                 return True
00205         # Check if it's a subclass of a subclass (recursive)
00206         for scls in cls.__subclasses__():
00207             if issubclass(subclass, scls):
00208                 cls._abc_cache.add(subclass)
00209                 return True
00210         # No dice; update negative cache
00211         cls._abc_negative_cache.add(subclass)
00212         return False

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Definition at line 11 of file test_finder.py.

00011 
00012     def find_module(self, fullname):
00013         importer = _bootstrap._FileFinder(util.PATH,
00014                                           _bootstrap._ExtensionFinderDetails())
00015         return importer.find_module(fullname)

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def abc.ABCMeta.register (   cls,
  subclass 
) [inherited]
Register a virtual subclass of an ABC.

Definition at line 135 of file abc.py.

00135 
00136     def register(cls, subclass):
00137         """Register a virtual subclass of an ABC."""
00138         if not isinstance(subclass, type):
00139             raise TypeError("Can only register classes")
00140         if issubclass(subclass, cls):
00141             return  # Already a subclass
00142         # Subtle: test for cycles *after* testing for "already a subclass";
00143         # this means we allow X.register(X) and interpret it as a no-op.
00144         if issubclass(cls, subclass):
00145             # This would create a cycle, which is bad for the algorithm below
00146             raise RuntimeError("Refusing to create an inheritance cycle")
00147         cls._abc_registry.add(subclass)
00148         ABCMeta._abc_invalidation_counter += 1  # Invalidate negative cache

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Reimplemented from importlib.test.abc.FinderTests.

Definition at line 35 of file test_finder.py.

00035 
00036     def test_failure(self):
00037         self.assertTrue(self.find_module('asdfjkl;') is None)

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Reimplemented from importlib.test.abc.FinderTests.

Definition at line 16 of file test_finder.py.

00016 
00017     def test_module(self):
00018         self.assertTrue(self.find_module(util.NAME))

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Reimplemented from importlib.test.abc.FinderTests.

Definition at line 23 of file test_finder.py.

00023 
00024     def test_module_in_package(self):
00025         # No extension module in a package available for testing.
00026         pass

Reimplemented from importlib.test.abc.FinderTests.

Definition at line 19 of file test_finder.py.

00019 
00020     def test_package(self):
00021         # Extension modules cannot be an __init__ for a package.
00022         pass

Reimplemented from importlib.test.abc.FinderTests.

Definition at line 27 of file test_finder.py.

00027 
00028     def test_package_in_package(self):
00029         # Extension modules cannot be an __init__ for a package.
00030         pass

Reimplemented from importlib.test.abc.FinderTests.

Definition at line 31 of file test_finder.py.

00031 
00032     def test_package_over_module(self):
00033         # Extension modules cannot be an __init__ for a package.
00034         pass


The documentation for this class was generated from the following file: