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d6d344d833
* bpo-29514: Check magic number for micro release Add a dict importlib.util.EXPECTED_MAGIC_NUMBERS which details the initial and expected pyc magic number for each minor release. This gives a mechanism for users to check if the magic number has changed within a release and for a test to ensure procedure is followed if a change is necessary. Add a test to check the current MAGIC_NUMBER against the expected number for the release if the current release is at candidate or final level. On test failure, describe to the developer the procedure for changing the magic number. * Simplify magic number release test Simplify the magic number release test by removing EXPECTED_MAGIC_NUMBERS table and making the expected magic number self-contained within the test. BPO: 29514 * Improve magic number test execution and message Improve the execution of the magic number test by using skipUnless for alpha and beta releases, and directly inheriting from unittest.TestCase rather than using the machinery for the other tests. Also improve the error message to explain the reason for caution in changing the magic number. BPO: 29514
805 lines
31 KiB
Python
805 lines
31 KiB
Python
from . import util
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abc = util.import_importlib('importlib.abc')
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init = util.import_importlib('importlib')
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machinery = util.import_importlib('importlib.machinery')
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importlib_util = util.import_importlib('importlib.util')
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import importlib.util
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import os
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import pathlib
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import string
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import sys
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from test import support
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import types
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import unittest
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import warnings
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class DecodeSourceBytesTests:
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source = "string ='ü'"
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def test_ut8_default(self):
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source_bytes = self.source.encode('utf-8')
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self.assertEqual(self.util.decode_source(source_bytes), self.source)
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def test_specified_encoding(self):
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source = '# coding=latin-1\n' + self.source
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source_bytes = source.encode('latin-1')
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assert source_bytes != source.encode('utf-8')
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self.assertEqual(self.util.decode_source(source_bytes), source)
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def test_universal_newlines(self):
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source = '\r\n'.join([self.source, self.source])
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source_bytes = source.encode('utf-8')
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self.assertEqual(self.util.decode_source(source_bytes),
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'\n'.join([self.source, self.source]))
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(Frozen_DecodeSourceBytesTests,
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Source_DecodeSourceBytesTests
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) = util.test_both(DecodeSourceBytesTests, util=importlib_util)
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class ModuleFromSpecTests:
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def test_no_create_module(self):
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class Loader:
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def exec_module(self, module):
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pass
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spec = self.machinery.ModuleSpec('test', Loader())
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with self.assertRaises(ImportError):
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module = self.util.module_from_spec(spec)
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def test_create_module_returns_None(self):
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class Loader(self.abc.Loader):
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def create_module(self, spec):
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return None
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spec = self.machinery.ModuleSpec('test', Loader())
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module = self.util.module_from_spec(spec)
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self.assertIsInstance(module, types.ModuleType)
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self.assertEqual(module.__name__, spec.name)
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def test_create_module(self):
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name = 'already set'
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class CustomModule(types.ModuleType):
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pass
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class Loader(self.abc.Loader):
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def create_module(self, spec):
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module = CustomModule(spec.name)
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module.__name__ = name
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return module
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spec = self.machinery.ModuleSpec('test', Loader())
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module = self.util.module_from_spec(spec)
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self.assertIsInstance(module, CustomModule)
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self.assertEqual(module.__name__, name)
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def test___name__(self):
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spec = self.machinery.ModuleSpec('test', object())
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__name__, spec.name)
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def test___spec__(self):
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spec = self.machinery.ModuleSpec('test', object())
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__spec__, spec)
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def test___loader__(self):
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loader = object()
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spec = self.machinery.ModuleSpec('test', loader)
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module = self.util.module_from_spec(spec)
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self.assertIs(module.__loader__, loader)
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def test___package__(self):
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spec = self.machinery.ModuleSpec('test.pkg', object())
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__package__, spec.parent)
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def test___path__(self):
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spec = self.machinery.ModuleSpec('test', object(), is_package=True)
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__path__, spec.submodule_search_locations)
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def test___file__(self):
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spec = self.machinery.ModuleSpec('test', object(), origin='some/path')
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spec.has_location = True
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__file__, spec.origin)
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def test___cached__(self):
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spec = self.machinery.ModuleSpec('test', object())
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spec.cached = 'some/path'
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spec.has_location = True
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module = self.util.module_from_spec(spec)
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self.assertEqual(module.__cached__, spec.cached)
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(Frozen_ModuleFromSpecTests,
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Source_ModuleFromSpecTests
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) = util.test_both(ModuleFromSpecTests, abc=abc, machinery=machinery,
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util=importlib_util)
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class ModuleForLoaderTests:
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"""Tests for importlib.util.module_for_loader."""
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@classmethod
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def module_for_loader(cls, func):
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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return cls.util.module_for_loader(func)
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def test_warning(self):
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# Should raise a PendingDeprecationWarning when used.
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with warnings.catch_warnings():
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warnings.simplefilter('error', DeprecationWarning)
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with self.assertRaises(DeprecationWarning):
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func = self.util.module_for_loader(lambda x: x)
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def return_module(self, name):
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fxn = self.module_for_loader(lambda self, module: module)
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return fxn(self, name)
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def raise_exception(self, name):
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def to_wrap(self, module):
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raise ImportError
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fxn = self.module_for_loader(to_wrap)
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try:
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fxn(self, name)
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except ImportError:
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pass
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def test_new_module(self):
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# Test that when no module exists in sys.modules a new module is
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# created.
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module_name = 'a.b.c'
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with util.uncache(module_name):
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module = self.return_module(module_name)
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self.assertIn(module_name, sys.modules)
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self.assertIsInstance(module, types.ModuleType)
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self.assertEqual(module.__name__, module_name)
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def test_reload(self):
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# Test that a module is reused if already in sys.modules.
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class FakeLoader:
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def is_package(self, name):
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return True
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@self.module_for_loader
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def load_module(self, module):
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return module
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name = 'a.b.c'
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module = types.ModuleType('a.b.c')
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module.__loader__ = 42
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module.__package__ = 42
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with util.uncache(name):
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sys.modules[name] = module
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loader = FakeLoader()
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returned_module = loader.load_module(name)
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self.assertIs(returned_module, sys.modules[name])
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self.assertEqual(module.__loader__, loader)
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self.assertEqual(module.__package__, name)
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def test_new_module_failure(self):
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# Test that a module is removed from sys.modules if added but an
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# exception is raised.
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name = 'a.b.c'
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with util.uncache(name):
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self.raise_exception(name)
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self.assertNotIn(name, sys.modules)
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def test_reload_failure(self):
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# Test that a failure on reload leaves the module in-place.
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name = 'a.b.c'
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module = types.ModuleType(name)
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with util.uncache(name):
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sys.modules[name] = module
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self.raise_exception(name)
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self.assertIs(module, sys.modules[name])
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def test_decorator_attrs(self):
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def fxn(self, module): pass
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wrapped = self.module_for_loader(fxn)
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self.assertEqual(wrapped.__name__, fxn.__name__)
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self.assertEqual(wrapped.__qualname__, fxn.__qualname__)
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def test_false_module(self):
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# If for some odd reason a module is considered false, still return it
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# from sys.modules.
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class FalseModule(types.ModuleType):
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def __bool__(self): return False
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name = 'mod'
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module = FalseModule(name)
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with util.uncache(name):
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self.assertFalse(module)
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sys.modules[name] = module
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given = self.return_module(name)
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self.assertIs(given, module)
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def test_attributes_set(self):
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# __name__, __loader__, and __package__ should be set (when
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# is_package() is defined; undefined implicitly tested elsewhere).
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class FakeLoader:
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def __init__(self, is_package):
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self._pkg = is_package
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def is_package(self, name):
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return self._pkg
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@self.module_for_loader
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def load_module(self, module):
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return module
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name = 'pkg.mod'
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with util.uncache(name):
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loader = FakeLoader(False)
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module = loader.load_module(name)
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self.assertEqual(module.__name__, name)
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self.assertIs(module.__loader__, loader)
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self.assertEqual(module.__package__, 'pkg')
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name = 'pkg.sub'
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with util.uncache(name):
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loader = FakeLoader(True)
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module = loader.load_module(name)
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self.assertEqual(module.__name__, name)
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self.assertIs(module.__loader__, loader)
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self.assertEqual(module.__package__, name)
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(Frozen_ModuleForLoaderTests,
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Source_ModuleForLoaderTests
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) = util.test_both(ModuleForLoaderTests, util=importlib_util)
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class SetPackageTests:
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"""Tests for importlib.util.set_package."""
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def verify(self, module, expect):
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"""Verify the module has the expected value for __package__ after
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passing through set_package."""
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fxn = lambda: module
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wrapped = self.util.set_package(fxn)
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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wrapped()
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self.assertTrue(hasattr(module, '__package__'))
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self.assertEqual(expect, module.__package__)
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def test_top_level(self):
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# __package__ should be set to the empty string if a top-level module.
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# Implicitly tests when package is set to None.
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module = types.ModuleType('module')
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module.__package__ = None
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self.verify(module, '')
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def test_package(self):
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# Test setting __package__ for a package.
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module = types.ModuleType('pkg')
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module.__path__ = ['<path>']
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module.__package__ = None
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self.verify(module, 'pkg')
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def test_submodule(self):
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# Test __package__ for a module in a package.
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module = types.ModuleType('pkg.mod')
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module.__package__ = None
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self.verify(module, 'pkg')
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def test_setting_if_missing(self):
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# __package__ should be set if it is missing.
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module = types.ModuleType('mod')
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if hasattr(module, '__package__'):
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delattr(module, '__package__')
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self.verify(module, '')
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def test_leaving_alone(self):
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# If __package__ is set and not None then leave it alone.
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for value in (True, False):
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module = types.ModuleType('mod')
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module.__package__ = value
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self.verify(module, value)
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def test_decorator_attrs(self):
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def fxn(module): pass
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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wrapped = self.util.set_package(fxn)
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self.assertEqual(wrapped.__name__, fxn.__name__)
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self.assertEqual(wrapped.__qualname__, fxn.__qualname__)
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(Frozen_SetPackageTests,
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Source_SetPackageTests
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) = util.test_both(SetPackageTests, util=importlib_util)
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class SetLoaderTests:
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"""Tests importlib.util.set_loader()."""
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@property
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def DummyLoader(self):
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# Set DummyLoader on the class lazily.
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class DummyLoader:
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@self.util.set_loader
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def load_module(self, module):
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return self.module
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self.__class__.DummyLoader = DummyLoader
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return DummyLoader
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def test_no_attribute(self):
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loader = self.DummyLoader()
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loader.module = types.ModuleType('blah')
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try:
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del loader.module.__loader__
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except AttributeError:
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pass
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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self.assertEqual(loader, loader.load_module('blah').__loader__)
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def test_attribute_is_None(self):
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loader = self.DummyLoader()
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loader.module = types.ModuleType('blah')
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loader.module.__loader__ = None
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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self.assertEqual(loader, loader.load_module('blah').__loader__)
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def test_not_reset(self):
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loader = self.DummyLoader()
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loader.module = types.ModuleType('blah')
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loader.module.__loader__ = 42
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', DeprecationWarning)
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self.assertEqual(42, loader.load_module('blah').__loader__)
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(Frozen_SetLoaderTests,
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Source_SetLoaderTests
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) = util.test_both(SetLoaderTests, util=importlib_util)
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class ResolveNameTests:
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"""Tests importlib.util.resolve_name()."""
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def test_absolute(self):
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# bacon
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self.assertEqual('bacon', self.util.resolve_name('bacon', None))
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def test_absolute_within_package(self):
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# bacon in spam
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self.assertEqual('bacon', self.util.resolve_name('bacon', 'spam'))
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def test_no_package(self):
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# .bacon in ''
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with self.assertRaises(ValueError):
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self.util.resolve_name('.bacon', '')
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def test_in_package(self):
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# .bacon in spam
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self.assertEqual('spam.eggs.bacon',
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self.util.resolve_name('.bacon', 'spam.eggs'))
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def test_other_package(self):
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# ..bacon in spam.bacon
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self.assertEqual('spam.bacon',
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self.util.resolve_name('..bacon', 'spam.eggs'))
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def test_escape(self):
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# ..bacon in spam
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with self.assertRaises(ValueError):
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self.util.resolve_name('..bacon', 'spam')
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(Frozen_ResolveNameTests,
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Source_ResolveNameTests
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) = util.test_both(ResolveNameTests, util=importlib_util)
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class FindSpecTests:
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class FakeMetaFinder:
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@staticmethod
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def find_spec(name, path=None, target=None): return name, path, target
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def test_sys_modules(self):
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name = 'some_mod'
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with util.uncache(name):
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module = types.ModuleType(name)
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loader = 'a loader!'
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spec = self.machinery.ModuleSpec(name, loader)
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module.__loader__ = loader
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module.__spec__ = spec
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sys.modules[name] = module
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found = self.util.find_spec(name)
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self.assertEqual(found, spec)
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def test_sys_modules_without___loader__(self):
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name = 'some_mod'
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with util.uncache(name):
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module = types.ModuleType(name)
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del module.__loader__
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loader = 'a loader!'
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spec = self.machinery.ModuleSpec(name, loader)
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module.__spec__ = spec
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sys.modules[name] = module
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found = self.util.find_spec(name)
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self.assertEqual(found, spec)
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def test_sys_modules_spec_is_None(self):
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name = 'some_mod'
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with util.uncache(name):
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module = types.ModuleType(name)
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module.__spec__ = None
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sys.modules[name] = module
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with self.assertRaises(ValueError):
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self.util.find_spec(name)
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def test_sys_modules_loader_is_None(self):
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name = 'some_mod'
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with util.uncache(name):
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module = types.ModuleType(name)
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spec = self.machinery.ModuleSpec(name, None)
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module.__spec__ = spec
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sys.modules[name] = module
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found = self.util.find_spec(name)
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self.assertEqual(found, spec)
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def test_sys_modules_spec_is_not_set(self):
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name = 'some_mod'
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with util.uncache(name):
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module = types.ModuleType(name)
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try:
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del module.__spec__
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except AttributeError:
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pass
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sys.modules[name] = module
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with self.assertRaises(ValueError):
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self.util.find_spec(name)
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def test_success(self):
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name = 'some_mod'
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with util.uncache(name):
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with util.import_state(meta_path=[self.FakeMetaFinder]):
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self.assertEqual((name, None, None),
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self.util.find_spec(name))
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def test_nothing(self):
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# None is returned upon failure to find a loader.
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self.assertIsNone(self.util.find_spec('nevergoingtofindthismodule'))
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def test_find_submodule(self):
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name = 'spam'
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subname = 'ham'
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with util.temp_module(name, pkg=True) as pkg_dir:
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fullname, _ = util.submodule(name, subname, pkg_dir)
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spec = self.util.find_spec(fullname)
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self.assertIsNot(spec, None)
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self.assertIn(name, sorted(sys.modules))
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self.assertNotIn(fullname, sorted(sys.modules))
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# Ensure successive calls behave the same.
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spec_again = self.util.find_spec(fullname)
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self.assertEqual(spec_again, spec)
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def test_find_submodule_parent_already_imported(self):
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name = 'spam'
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subname = 'ham'
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with util.temp_module(name, pkg=True) as pkg_dir:
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self.init.import_module(name)
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fullname, _ = util.submodule(name, subname, pkg_dir)
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spec = self.util.find_spec(fullname)
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self.assertIsNot(spec, None)
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self.assertIn(name, sorted(sys.modules))
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self.assertNotIn(fullname, sorted(sys.modules))
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# Ensure successive calls behave the same.
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spec_again = self.util.find_spec(fullname)
|
|
self.assertEqual(spec_again, spec)
|
|
|
|
def test_find_relative_module(self):
|
|
name = 'spam'
|
|
subname = 'ham'
|
|
with util.temp_module(name, pkg=True) as pkg_dir:
|
|
fullname, _ = util.submodule(name, subname, pkg_dir)
|
|
relname = '.' + subname
|
|
spec = self.util.find_spec(relname, name)
|
|
self.assertIsNot(spec, None)
|
|
self.assertIn(name, sorted(sys.modules))
|
|
self.assertNotIn(fullname, sorted(sys.modules))
|
|
# Ensure successive calls behave the same.
|
|
spec_again = self.util.find_spec(fullname)
|
|
self.assertEqual(spec_again, spec)
|
|
|
|
def test_find_relative_module_missing_package(self):
|
|
name = 'spam'
|
|
subname = 'ham'
|
|
with util.temp_module(name, pkg=True) as pkg_dir:
|
|
fullname, _ = util.submodule(name, subname, pkg_dir)
|
|
relname = '.' + subname
|
|
with self.assertRaises(ValueError):
|
|
self.util.find_spec(relname)
|
|
self.assertNotIn(name, sorted(sys.modules))
|
|
self.assertNotIn(fullname, sorted(sys.modules))
|
|
|
|
|
|
(Frozen_FindSpecTests,
|
|
Source_FindSpecTests
|
|
) = util.test_both(FindSpecTests, init=init, util=importlib_util,
|
|
machinery=machinery)
|
|
|
|
|
|
class MagicNumberTests:
|
|
|
|
def test_length(self):
|
|
# Should be 4 bytes.
|
|
self.assertEqual(len(self.util.MAGIC_NUMBER), 4)
|
|
|
|
def test_incorporates_rn(self):
|
|
# The magic number uses \r\n to come out wrong when splitting on lines.
|
|
self.assertTrue(self.util.MAGIC_NUMBER.endswith(b'\r\n'))
|
|
|
|
|
|
(Frozen_MagicNumberTests,
|
|
Source_MagicNumberTests
|
|
) = util.test_both(MagicNumberTests, util=importlib_util)
|
|
|
|
|
|
class PEP3147Tests:
|
|
|
|
"""Tests of PEP 3147-related functions: cache_from_source and source_from_cache."""
|
|
|
|
tag = sys.implementation.cache_tag
|
|
|
|
@unittest.skipUnless(sys.implementation.cache_tag is not None,
|
|
'requires sys.implementation.cache_tag not be None')
|
|
def test_cache_from_source(self):
|
|
# Given the path to a .py file, return the path to its PEP 3147
|
|
# defined .pyc file (i.e. under __pycache__).
|
|
path = os.path.join('foo', 'bar', 'baz', 'qux.py')
|
|
expect = os.path.join('foo', 'bar', 'baz', '__pycache__',
|
|
'qux.{}.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=''),
|
|
expect)
|
|
|
|
def test_cache_from_source_no_cache_tag(self):
|
|
# No cache tag means NotImplementedError.
|
|
with support.swap_attr(sys.implementation, 'cache_tag', None):
|
|
with self.assertRaises(NotImplementedError):
|
|
self.util.cache_from_source('whatever.py')
|
|
|
|
def test_cache_from_source_no_dot(self):
|
|
# Directory with a dot, filename without dot.
|
|
path = os.path.join('foo.bar', 'file')
|
|
expect = os.path.join('foo.bar', '__pycache__',
|
|
'file{}.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=''),
|
|
expect)
|
|
|
|
def test_cache_from_source_debug_override(self):
|
|
# Given the path to a .py file, return the path to its PEP 3147/PEP 488
|
|
# defined .pyc file (i.e. under __pycache__).
|
|
path = os.path.join('foo', 'bar', 'baz', 'qux.py')
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('ignore')
|
|
self.assertEqual(self.util.cache_from_source(path, False),
|
|
self.util.cache_from_source(path, optimization=1))
|
|
self.assertEqual(self.util.cache_from_source(path, True),
|
|
self.util.cache_from_source(path, optimization=''))
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('error')
|
|
with self.assertRaises(DeprecationWarning):
|
|
self.util.cache_from_source(path, False)
|
|
with self.assertRaises(DeprecationWarning):
|
|
self.util.cache_from_source(path, True)
|
|
|
|
def test_cache_from_source_cwd(self):
|
|
path = 'foo.py'
|
|
expect = os.path.join('__pycache__', 'foo.{}.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=''),
|
|
expect)
|
|
|
|
def test_cache_from_source_override(self):
|
|
# When debug_override is not None, it can be any true-ish or false-ish
|
|
# value.
|
|
path = os.path.join('foo', 'bar', 'baz.py')
|
|
# However if the bool-ishness can't be determined, the exception
|
|
# propagates.
|
|
class Bearish:
|
|
def __bool__(self): raise RuntimeError
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('ignore')
|
|
self.assertEqual(self.util.cache_from_source(path, []),
|
|
self.util.cache_from_source(path, optimization=1))
|
|
self.assertEqual(self.util.cache_from_source(path, [17]),
|
|
self.util.cache_from_source(path, optimization=''))
|
|
with self.assertRaises(RuntimeError):
|
|
self.util.cache_from_source('/foo/bar/baz.py', Bearish())
|
|
|
|
|
|
def test_cache_from_source_optimization_empty_string(self):
|
|
# Setting 'optimization' to '' leads to no optimization tag (PEP 488).
|
|
path = 'foo.py'
|
|
expect = os.path.join('__pycache__', 'foo.{}.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=''),
|
|
expect)
|
|
|
|
def test_cache_from_source_optimization_None(self):
|
|
# Setting 'optimization' to None uses the interpreter's optimization.
|
|
# (PEP 488)
|
|
path = 'foo.py'
|
|
optimization_level = sys.flags.optimize
|
|
almost_expect = os.path.join('__pycache__', 'foo.{}'.format(self.tag))
|
|
if optimization_level == 0:
|
|
expect = almost_expect + '.pyc'
|
|
elif optimization_level <= 2:
|
|
expect = almost_expect + '.opt-{}.pyc'.format(optimization_level)
|
|
else:
|
|
msg = '{!r} is a non-standard optimization level'.format(optimization_level)
|
|
self.skipTest(msg)
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=None),
|
|
expect)
|
|
|
|
def test_cache_from_source_optimization_set(self):
|
|
# The 'optimization' parameter accepts anything that has a string repr
|
|
# that passes str.alnum().
|
|
path = 'foo.py'
|
|
valid_characters = string.ascii_letters + string.digits
|
|
almost_expect = os.path.join('__pycache__', 'foo.{}'.format(self.tag))
|
|
got = self.util.cache_from_source(path, optimization=valid_characters)
|
|
# Test all valid characters are accepted.
|
|
self.assertEqual(got,
|
|
almost_expect + '.opt-{}.pyc'.format(valid_characters))
|
|
# str() should be called on argument.
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=42),
|
|
almost_expect + '.opt-42.pyc')
|
|
# Invalid characters raise ValueError.
|
|
with self.assertRaises(ValueError):
|
|
self.util.cache_from_source(path, optimization='path/is/bad')
|
|
|
|
def test_cache_from_source_debug_override_optimization_both_set(self):
|
|
# Can only set one of the optimization-related parameters.
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter('ignore')
|
|
with self.assertRaises(TypeError):
|
|
self.util.cache_from_source('foo.py', False, optimization='')
|
|
|
|
@unittest.skipUnless(os.sep == '\\' and os.altsep == '/',
|
|
'test meaningful only where os.altsep is defined')
|
|
def test_sep_altsep_and_sep_cache_from_source(self):
|
|
# Windows path and PEP 3147 where sep is right of altsep.
|
|
self.assertEqual(
|
|
self.util.cache_from_source('\\foo\\bar\\baz/qux.py', optimization=''),
|
|
'\\foo\\bar\\baz\\__pycache__\\qux.{}.pyc'.format(self.tag))
|
|
|
|
@unittest.skipUnless(sys.implementation.cache_tag is not None,
|
|
'requires sys.implementation.cache_tag not be None')
|
|
def test_source_from_cache_path_like_arg(self):
|
|
path = pathlib.PurePath('foo', 'bar', 'baz', 'qux.py')
|
|
expect = os.path.join('foo', 'bar', 'baz', '__pycache__',
|
|
'qux.{}.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.cache_from_source(path, optimization=''),
|
|
expect)
|
|
|
|
@unittest.skipUnless(sys.implementation.cache_tag is not None,
|
|
'requires sys.implementation.cache_tag to not be '
|
|
'None')
|
|
def test_source_from_cache(self):
|
|
# Given the path to a PEP 3147 defined .pyc file, return the path to
|
|
# its source. This tests the good path.
|
|
path = os.path.join('foo', 'bar', 'baz', '__pycache__',
|
|
'qux.{}.pyc'.format(self.tag))
|
|
expect = os.path.join('foo', 'bar', 'baz', 'qux.py')
|
|
self.assertEqual(self.util.source_from_cache(path), expect)
|
|
|
|
def test_source_from_cache_no_cache_tag(self):
|
|
# If sys.implementation.cache_tag is None, raise NotImplementedError.
|
|
path = os.path.join('blah', '__pycache__', 'whatever.pyc')
|
|
with support.swap_attr(sys.implementation, 'cache_tag', None):
|
|
with self.assertRaises(NotImplementedError):
|
|
self.util.source_from_cache(path)
|
|
|
|
def test_source_from_cache_bad_path(self):
|
|
# When the path to a pyc file is not in PEP 3147 format, a ValueError
|
|
# is raised.
|
|
self.assertRaises(
|
|
ValueError, self.util.source_from_cache, '/foo/bar/bazqux.pyc')
|
|
|
|
def test_source_from_cache_no_slash(self):
|
|
# No slashes at all in path -> ValueError
|
|
self.assertRaises(
|
|
ValueError, self.util.source_from_cache, 'foo.cpython-32.pyc')
|
|
|
|
def test_source_from_cache_too_few_dots(self):
|
|
# Too few dots in final path component -> ValueError
|
|
self.assertRaises(
|
|
ValueError, self.util.source_from_cache, '__pycache__/foo.pyc')
|
|
|
|
def test_source_from_cache_too_many_dots(self):
|
|
with self.assertRaises(ValueError):
|
|
self.util.source_from_cache(
|
|
'__pycache__/foo.cpython-32.opt-1.foo.pyc')
|
|
|
|
def test_source_from_cache_not_opt(self):
|
|
# Non-`opt-` path component -> ValueError
|
|
self.assertRaises(
|
|
ValueError, self.util.source_from_cache,
|
|
'__pycache__/foo.cpython-32.foo.pyc')
|
|
|
|
def test_source_from_cache_no__pycache__(self):
|
|
# Another problem with the path -> ValueError
|
|
self.assertRaises(
|
|
ValueError, self.util.source_from_cache,
|
|
'/foo/bar/foo.cpython-32.foo.pyc')
|
|
|
|
def test_source_from_cache_optimized_bytecode(self):
|
|
# Optimized bytecode is not an issue.
|
|
path = os.path.join('__pycache__', 'foo.{}.opt-1.pyc'.format(self.tag))
|
|
self.assertEqual(self.util.source_from_cache(path), 'foo.py')
|
|
|
|
def test_source_from_cache_missing_optimization(self):
|
|
# An empty optimization level is a no-no.
|
|
path = os.path.join('__pycache__', 'foo.{}.opt-.pyc'.format(self.tag))
|
|
with self.assertRaises(ValueError):
|
|
self.util.source_from_cache(path)
|
|
|
|
@unittest.skipUnless(sys.implementation.cache_tag is not None,
|
|
'requires sys.implementation.cache_tag to not be '
|
|
'None')
|
|
def test_source_from_cache_path_like_arg(self):
|
|
path = pathlib.PurePath('foo', 'bar', 'baz', '__pycache__',
|
|
'qux.{}.pyc'.format(self.tag))
|
|
expect = os.path.join('foo', 'bar', 'baz', 'qux.py')
|
|
self.assertEqual(self.util.source_from_cache(path), expect)
|
|
|
|
|
|
(Frozen_PEP3147Tests,
|
|
Source_PEP3147Tests
|
|
) = util.test_both(PEP3147Tests, util=importlib_util)
|
|
|
|
|
|
class MagicNumberTests(unittest.TestCase):
|
|
"""
|
|
Test release compatibility issues relating to importlib
|
|
"""
|
|
@unittest.skipUnless(
|
|
sys.version_info.releaselevel in ('final', 'release'),
|
|
'only applies to candidate or final python release levels'
|
|
)
|
|
def test_magic_number(self):
|
|
"""
|
|
Each python minor release should generally have a MAGIC_NUMBER
|
|
that does not change once the release reaches candidate status.
|
|
|
|
Once a release reaches candidate status, the value of the constant
|
|
EXPECTED_MAGIC_NUMBER in this test should be changed.
|
|
This test will then check that the actual MAGIC_NUMBER matches
|
|
the expected value for the release.
|
|
|
|
In exceptional cases, it may be required to change the MAGIC_NUMBER
|
|
for a maintenance release. In this case the change should be
|
|
discussed in python-dev. If a change is required, community
|
|
stakeholders such as OS package maintainers must be notified
|
|
in advance. Such exceptional releases will then require an
|
|
adjustment to this test case.
|
|
"""
|
|
EXPECTED_MAGIC_NUMBER = 3379
|
|
actual = int.from_bytes(importlib.util.MAGIC_NUMBER[:2], 'little')
|
|
|
|
msg = (
|
|
"To avoid breaking backwards compatibility with cached bytecode "
|
|
"files that can't be automatically regenerated by the current "
|
|
"user, candidate and final releases require the current "
|
|
"importlib.util.MAGIC_NUMBER to match the expected "
|
|
"magic number in this test. Set the expected "
|
|
"magic number in this test to the current MAGIC_NUMBER to "
|
|
"continue with the release.\n\n"
|
|
"Changing the MAGIC_NUMBER for a maintenance release "
|
|
"requires discussion in python-dev and notification of "
|
|
"community stakeholders."
|
|
)
|
|
self.assertEqual(EXPECTED_MAGIC_NUMBER, actual, msg)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|