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943 lines (710 loc) · 31.5 KB
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import io
import marshal
import os
import sys
from test.support import import_helper
import types
import unittest
from unittest import mock
import warnings
from test.test_importlib import util as test_util
init = test_util.import_importlib('importlib')
abc = test_util.import_importlib('importlib.abc')
machinery = test_util.import_importlib('importlib.machinery')
util = test_util.import_importlib('importlib.util')
##### Inheritance ##############################################################
class InheritanceTests:
"""Test that the specified class is a subclass/superclass of the expected
classes."""
subclasses = []
superclasses = []
def setUp(self):
self.superclasses = [getattr(self.abc, class_name)
for class_name in self.superclass_names]
if hasattr(self, 'subclass_names'):
# Because test.support.import_fresh_module() creates a new
# importlib._bootstrap per module, inheritance checks fail when
# checking across module boundaries (i.e. the _bootstrap in abc is
# not the same as the one in machinery). That means stealing one of
# the modules from the other to make sure the same instance is used.
machinery = self.abc.machinery
self.subclasses = [getattr(machinery, class_name)
for class_name in self.subclass_names]
assert self.subclasses or self.superclasses, self.__class__
self.__test = getattr(self.abc, self._NAME)
def test_subclasses(self):
# Test that the expected subclasses inherit.
for subclass in self.subclasses:
self.assertIsSubclass(subclass, self.__test)
def test_superclasses(self):
# Test that the class inherits from the expected superclasses.
for superclass in self.superclasses:
self.assertIsSubclass(self.__test, superclass)
class MetaPathFinder(InheritanceTests):
superclass_names = []
subclass_names = ['BuiltinImporter', 'FrozenImporter', 'PathFinder',
'WindowsRegistryFinder']
(Frozen_MetaPathFinderInheritanceTests,
Source_MetaPathFinderInheritanceTests
) = test_util.test_both(MetaPathFinder, abc=abc)
class PathEntryFinder(InheritanceTests):
superclass_names = []
subclass_names = ['FileFinder']
(Frozen_PathEntryFinderInheritanceTests,
Source_PathEntryFinderInheritanceTests
) = test_util.test_both(PathEntryFinder, abc=abc)
class ResourceLoader(InheritanceTests):
superclass_names = ['Loader']
(Frozen_ResourceLoaderInheritanceTests,
Source_ResourceLoaderInheritanceTests
) = test_util.test_both(ResourceLoader, abc=abc)
class InspectLoader(InheritanceTests):
superclass_names = ['Loader']
subclass_names = ['BuiltinImporter', 'FrozenImporter', 'ExtensionFileLoader']
(Frozen_InspectLoaderInheritanceTests,
Source_InspectLoaderInheritanceTests
) = test_util.test_both(InspectLoader, abc=abc)
class ExecutionLoader(InheritanceTests):
superclass_names = ['InspectLoader']
subclass_names = ['ExtensionFileLoader']
(Frozen_ExecutionLoaderInheritanceTests,
Source_ExecutionLoaderInheritanceTests
) = test_util.test_both(ExecutionLoader, abc=abc)
class FileLoader(InheritanceTests):
superclass_names = ['ResourceLoader', 'ExecutionLoader']
subclass_names = ['SourceFileLoader', 'SourcelessFileLoader']
(Frozen_FileLoaderInheritanceTests,
Source_FileLoaderInheritanceTests
) = test_util.test_both(FileLoader, abc=abc)
class SourceLoader(InheritanceTests):
superclass_names = ['ResourceLoader', 'ExecutionLoader']
subclass_names = ['SourceFileLoader']
(Frozen_SourceLoaderInheritanceTests,
Source_SourceLoaderInheritanceTests
) = test_util.test_both(SourceLoader, abc=abc)
##### Default return values ####################################################
def make_abc_subclasses(base_class, name=None, inst=False, **kwargs):
if name is None:
name = base_class.__name__
base = {kind: getattr(splitabc, name)
for kind, splitabc in abc.items()}
return {cls._KIND: cls() if inst else cls
for cls in test_util.split_frozen(base_class, base, **kwargs)}
class ABCTestHarness:
@property
def ins(self):
# Lazily set ins on the class.
cls = self.SPLIT[self._KIND]
ins = cls()
self.__class__.ins = ins
return ins
class MetaPathFinder:
pass
class MetaPathFinderDefaultsTests(ABCTestHarness):
SPLIT = make_abc_subclasses(MetaPathFinder)
def test_invalidate_caches(self):
# Calling the method is a no-op.
self.ins.invalidate_caches()
(Frozen_MPFDefaultTests,
Source_MPFDefaultTests
) = test_util.test_both(MetaPathFinderDefaultsTests)
class PathEntryFinder:
pass
class PathEntryFinderDefaultsTests(ABCTestHarness):
SPLIT = make_abc_subclasses(PathEntryFinder)
def test_invalidate_caches(self):
# Should be a no-op.
self.ins.invalidate_caches()
(Frozen_PEFDefaultTests,
Source_PEFDefaultTests
) = test_util.test_both(PathEntryFinderDefaultsTests)
class Loader:
pass
class LoaderDefaultsTests(ABCTestHarness):
SPLIT = make_abc_subclasses(Loader)
def test_create_module(self):
spec = 'a spec'
self.assertIsNone(self.ins.create_module(spec))
def test_load_module(self):
with self.assertRaises(ImportError):
self.ins.load_module('something')
def test_module_repr(self):
mod = types.ModuleType('blah')
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
original_repr = repr(mod)
mod.__loader__ = self.ins
# Should still return a proper repr.
self.assertTrue(repr(mod))
(Frozen_LDefaultTests,
SourceLDefaultTests
) = test_util.test_both(LoaderDefaultsTests)
class ResourceLoader(Loader):
def get_data(self, path):
return super().get_data(path)
class ResourceLoaderDefaultsTests(ABCTestHarness):
SPLIT = make_abc_subclasses(ResourceLoader)
def test_get_data(self):
with self.assertRaises(IOError):
self.ins.get_data('/some/path')
(Frozen_RLDefaultTests,
Source_RLDefaultTests
) = test_util.test_both(ResourceLoaderDefaultsTests)
class InspectLoader(Loader):
def is_package(self, fullname):
return super().is_package(fullname)
def get_source(self, fullname):
return super().get_source(fullname)
SPLIT_IL = make_abc_subclasses(InspectLoader)
class InspectLoaderDefaultsTests(ABCTestHarness):
SPLIT = SPLIT_IL
def test_is_package(self):
with self.assertRaises(ImportError):
self.ins.is_package('blah')
def test_get_source(self):
with self.assertRaises(ImportError):
self.ins.get_source('blah')
(Frozen_ILDefaultTests,
Source_ILDefaultTests
) = test_util.test_both(InspectLoaderDefaultsTests)
class ExecutionLoader(InspectLoader):
def get_filename(self, fullname):
return super().get_filename(fullname)
SPLIT_EL = make_abc_subclasses(ExecutionLoader)
class ExecutionLoaderDefaultsTests(ABCTestHarness):
SPLIT = SPLIT_EL
def test_get_filename(self):
with self.assertRaises(ImportError):
self.ins.get_filename('blah')
(Frozen_ELDefaultTests,
Source_ELDefaultsTests
) = test_util.test_both(InspectLoaderDefaultsTests)
class ResourceReader:
def open_resource(self, *args, **kwargs):
return super().open_resource(*args, **kwargs)
def resource_path(self, *args, **kwargs):
return super().resource_path(*args, **kwargs)
def is_resource(self, *args, **kwargs):
return super().is_resource(*args, **kwargs)
def contents(self, *args, **kwargs):
return super().contents(*args, **kwargs)
##### MetaPathFinder concrete methods ##########################################
class MetaPathFinderFindModuleTests:
@classmethod
def finder(cls, spec):
class MetaPathSpecFinder(cls.abc.MetaPathFinder):
def find_spec(self, fullname, path, target=None):
self.called_for = fullname, path
return spec
return MetaPathSpecFinder()
def test_find_spec_with_explicit_target(self):
loader = object()
spec = self.util.spec_from_loader('blah', loader)
finder = self.finder(spec)
found = finder.find_spec('blah', 'blah', None)
self.assertEqual(found, spec)
def test_no_spec(self):
finder = self.finder(None)
path = ['a', 'b', 'c']
name = 'blah'
found = finder.find_spec(name, path, None)
self.assertIsNone(found)
self.assertEqual(name, finder.called_for[0])
self.assertEqual(path, finder.called_for[1])
def test_spec(self):
loader = object()
spec = self.util.spec_from_loader('blah', loader)
finder = self.finder(spec)
found = finder.find_spec('blah', None)
self.assertIs(found, spec)
(Frozen_MPFFindModuleTests,
Source_MPFFindModuleTests
) = test_util.test_both(MetaPathFinderFindModuleTests, abc=abc, util=util)
##### Loader concrete methods ##################################################
class LoaderLoadModuleTests:
def loader(self):
class SpecLoader(self.abc.Loader):
found = None
def exec_module(self, module):
self.found = module
def is_package(self, fullname):
"""Force some non-default module state to be set."""
return True
return SpecLoader()
def test_fresh(self):
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
loader = self.loader()
name = 'blah'
with test_util.uncache(name):
loader.load_module(name)
module = loader.found
self.assertIs(sys.modules[name], module)
self.assertEqual(loader, module.__loader__)
self.assertEqual(loader, module.__spec__.loader)
self.assertEqual(name, module.__name__)
self.assertEqual(name, module.__spec__.name)
self.assertIsNotNone(module.__path__)
self.assertIsNotNone(module.__path__,
module.__spec__.submodule_search_locations)
def test_reload(self):
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
name = 'blah'
loader = self.loader()
module = types.ModuleType(name)
module.__spec__ = self.util.spec_from_loader(name, loader)
module.__loader__ = loader
with test_util.uncache(name):
sys.modules[name] = module
loader.load_module(name)
found = loader.found
self.assertIs(found, sys.modules[name])
self.assertIs(module, sys.modules[name])
(Frozen_LoaderLoadModuleTests,
Source_LoaderLoadModuleTests
) = test_util.test_both(LoaderLoadModuleTests, abc=abc, util=util)
##### InspectLoader concrete methods ###########################################
class InspectLoaderSourceToCodeTests:
def source_to_module(self, data, path=None):
"""Help with source_to_code() tests."""
module = types.ModuleType('blah')
loader = self.InspectLoaderSubclass()
if path is None:
code = loader.source_to_code(data)
else:
code = loader.source_to_code(data, path)
exec(code, module.__dict__)
return module
def test_source_to_code_source(self):
# Since compile() can handle strings, so should source_to_code().
source = 'attr = 42'
module = self.source_to_module(source)
self.assertHasAttr(module, 'attr')
self.assertEqual(module.attr, 42)
def test_source_to_code_bytes(self):
# Since compile() can handle bytes, so should source_to_code().
source = b'attr = 42'
module = self.source_to_module(source)
self.assertHasAttr(module, 'attr')
self.assertEqual(module.attr, 42)
def test_source_to_code_path(self):
# Specifying a path should set it for the code object.
path = 'path/to/somewhere'
loader = self.InspectLoaderSubclass()
code = loader.source_to_code('', path)
self.assertEqual(code.co_filename, path)
def test_source_to_code_no_path(self):
# Not setting a path should still work and be set to <string> since that
# is a pre-existing practice as a default to compile().
loader = self.InspectLoaderSubclass()
code = loader.source_to_code('')
self.assertEqual(code.co_filename, '<string>')
(Frozen_ILSourceToCodeTests,
Source_ILSourceToCodeTests
) = test_util.test_both(InspectLoaderSourceToCodeTests,
InspectLoaderSubclass=SPLIT_IL)
class InspectLoaderGetCodeTests:
def test_get_code(self):
# Test success.
module = types.ModuleType('blah')
with mock.patch.object(self.InspectLoaderSubclass, 'get_source') as mocked:
mocked.return_value = 'attr = 42'
loader = self.InspectLoaderSubclass()
code = loader.get_code('blah')
exec(code, module.__dict__)
self.assertEqual(module.attr, 42)
def test_get_code_source_is_None(self):
# If get_source() is None then this should be None.
with mock.patch.object(self.InspectLoaderSubclass, 'get_source') as mocked:
mocked.return_value = None
loader = self.InspectLoaderSubclass()
code = loader.get_code('blah')
self.assertIsNone(code)
def test_get_code_source_not_found(self):
# If there is no source then there is no code object.
loader = self.InspectLoaderSubclass()
with self.assertRaises(ImportError):
loader.get_code('blah')
(Frozen_ILGetCodeTests,
Source_ILGetCodeTests
) = test_util.test_both(InspectLoaderGetCodeTests,
InspectLoaderSubclass=SPLIT_IL)
class InspectLoaderLoadModuleTests:
"""Test InspectLoader.load_module()."""
module_name = 'blah'
def setUp(self):
import_helper.unload(self.module_name)
self.addCleanup(import_helper.unload, self.module_name)
def load(self, loader):
spec = self.util.spec_from_loader(self.module_name, loader)
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
return self.init._bootstrap._load_unlocked(spec)
def mock_get_code(self):
return mock.patch.object(self.InspectLoaderSubclass, 'get_code')
def test_get_code_ImportError(self):
# If get_code() raises ImportError, it should propagate.
with self.mock_get_code() as mocked_get_code:
mocked_get_code.side_effect = ImportError
with self.assertRaises(ImportError):
loader = self.InspectLoaderSubclass()
self.load(loader)
def test_get_code_None(self):
# If get_code() returns None, raise ImportError.
with self.mock_get_code() as mocked_get_code:
mocked_get_code.return_value = None
with self.assertRaises(ImportError):
loader = self.InspectLoaderSubclass()
self.load(loader)
def test_module_returned(self):
# The loaded module should be returned.
code = compile('attr = 42', '<string>', 'exec')
with self.mock_get_code() as mocked_get_code:
mocked_get_code.return_value = code
loader = self.InspectLoaderSubclass()
module = self.load(loader)
self.assertEqual(module, sys.modules[self.module_name])
(Frozen_ILLoadModuleTests,
Source_ILLoadModuleTests
) = test_util.test_both(InspectLoaderLoadModuleTests,
InspectLoaderSubclass=SPLIT_IL,
init=init,
util=util)
##### ExecutionLoader concrete methods #########################################
class ExecutionLoaderGetCodeTests:
def mock_methods(self, *, get_source=False, get_filename=False):
source_mock_context, filename_mock_context = None, None
if get_source:
source_mock_context = mock.patch.object(self.ExecutionLoaderSubclass,
'get_source')
if get_filename:
filename_mock_context = mock.patch.object(self.ExecutionLoaderSubclass,
'get_filename')
return source_mock_context, filename_mock_context
def test_get_code(self):
path = 'blah.py'
source_mock_context, filename_mock_context = self.mock_methods(
get_source=True, get_filename=True)
with source_mock_context as source_mock, filename_mock_context as name_mock:
source_mock.return_value = 'attr = 42'
name_mock.return_value = path
loader = self.ExecutionLoaderSubclass()
code = loader.get_code('blah')
self.assertEqual(code.co_filename, path)
module = types.ModuleType('blah')
exec(code, module.__dict__)
self.assertEqual(module.attr, 42)
def test_get_code_source_is_None(self):
# If get_source() is None then this should be None.
source_mock_context, _ = self.mock_methods(get_source=True)
with source_mock_context as mocked:
mocked.return_value = None
loader = self.ExecutionLoaderSubclass()
code = loader.get_code('blah')
self.assertIsNone(code)
def test_get_code_source_not_found(self):
# If there is no source then there is no code object.
loader = self.ExecutionLoaderSubclass()
with self.assertRaises(ImportError):
loader.get_code('blah')
def test_get_code_no_path(self):
# If get_filename() raises ImportError then simply skip setting the path
# on the code object.
source_mock_context, filename_mock_context = self.mock_methods(
get_source=True, get_filename=True)
with source_mock_context as source_mock, filename_mock_context as name_mock:
source_mock.return_value = 'attr = 42'
name_mock.side_effect = ImportError
loader = self.ExecutionLoaderSubclass()
code = loader.get_code('blah')
self.assertEqual(code.co_filename, '<string>')
module = types.ModuleType('blah')
exec(code, module.__dict__)
self.assertEqual(module.attr, 42)
(Frozen_ELGetCodeTests,
Source_ELGetCodeTests
) = test_util.test_both(ExecutionLoaderGetCodeTests,
ExecutionLoaderSubclass=SPLIT_EL)
##### SourceLoader concrete methods ############################################
class SourceOnlyLoader:
# Globals that should be defined for all modules.
source = (b"_ = '::'.join([__name__, __file__, __cached__, __package__, "
b"repr(__loader__)])")
def __init__(self, path):
self.path = path
def get_data(self, path):
if path != self.path:
raise IOError
return self.source
def get_filename(self, fullname):
return self.path
SPLIT_SOL = make_abc_subclasses(SourceOnlyLoader, 'SourceLoader')
class SourceLoader(SourceOnlyLoader):
source_mtime = 1
def __init__(self, path, magic=None):
super().__init__(path)
self.bytecode_path = self.util.cache_from_source(self.path)
self.source_size = len(self.source)
if magic is None:
magic = self.util.MAGIC_NUMBER
data = bytearray(magic)
data.extend(self.init._pack_uint32(0))
data.extend(self.init._pack_uint32(self.source_mtime))
data.extend(self.init._pack_uint32(self.source_size))
code_object = compile(self.source, self.path, 'exec',
dont_inherit=True)
data.extend(marshal.dumps(code_object))
self.bytecode = bytes(data)
self.written = {}
def get_data(self, path):
if path == self.path:
return super().get_data(path)
elif path == self.bytecode_path:
return self.bytecode
else:
raise OSError
def path_stats(self, path):
if path != self.path:
raise IOError
return {'mtime': self.source_mtime, 'size': self.source_size}
def set_data(self, path, data):
self.written[path] = bytes(data)
return path == self.bytecode_path
SPLIT_SL = make_abc_subclasses(SourceLoader, util=util, init=init)
class SourceLoaderTestHarness:
def setUp(self, *, is_package=True, **kwargs):
self.package = 'pkg'
if is_package:
self.path = os.path.join(self.package, '__init__.py')
self.name = self.package
else:
module_name = 'mod'
self.path = os.path.join(self.package, '.'.join(['mod', 'py']))
self.name = '.'.join([self.package, module_name])
self.cached = self.util.cache_from_source(self.path)
self.loader = self.loader_mock(self.path, **kwargs)
def verify_module(self, module):
self.assertEqual(module.__name__, self.name)
self.assertEqual(module.__file__, self.path)
self.assertEqual(module.__cached__, self.cached)
self.assertEqual(module.__package__, self.package)
self.assertEqual(module.__loader__, self.loader)
values = module._.split('::')
self.assertEqual(values[0], self.name)
self.assertEqual(values[1], self.path)
self.assertEqual(values[2], self.cached)
self.assertEqual(values[3], self.package)
self.assertEqual(values[4], repr(self.loader))
def verify_code(self, code_object):
module = types.ModuleType(self.name)
module.__file__ = self.path
module.__cached__ = self.cached
module.__package__ = self.package
module.__loader__ = self.loader
module.__path__ = []
exec(code_object, module.__dict__)
self.verify_module(module)
class SourceOnlyLoaderTests(SourceLoaderTestHarness):
"""Test importlib.abc.SourceLoader for source-only loading."""
def test_get_source(self):
# Verify the source code is returned as a string.
# If an OSError is raised by get_data then raise ImportError.
expected_source = self.loader.source.decode('utf-8')
self.assertEqual(self.loader.get_source(self.name), expected_source)
def raise_OSError(path):
raise OSError
self.loader.get_data = raise_OSError
with self.assertRaises(ImportError) as cm:
self.loader.get_source(self.name)
self.assertEqual(cm.exception.name, self.name)
def test_is_package(self):
# Properly detect when loading a package.
self.setUp(is_package=False)
self.assertFalse(self.loader.is_package(self.name))
self.setUp(is_package=True)
self.assertTrue(self.loader.is_package(self.name))
self.assertFalse(self.loader.is_package(self.name + '.__init__'))
def test_get_code(self):
# Verify the code object is created.
code_object = self.loader.get_code(self.name)
self.verify_code(code_object)
def test_source_to_code(self):
# Verify the compiled code object.
code = self.loader.source_to_code(self.loader.source, self.path)
self.verify_code(code)
def test_load_module(self):
# Loading a module should set __name__, __loader__, __package__,
# __path__ (for packages), __file__, and __cached__.
# The module should also be put into sys.modules.
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
with test_util.uncache(self.name):
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
module = self.loader.load_module(self.name)
self.verify_module(module)
self.assertEqual(module.__path__, [os.path.dirname(self.path)])
self.assertIn(self.name, sys.modules)
def test_package_settings(self):
# __package__ needs to be set, while __path__ is set on if the module
# is a package.
# Testing the values for a package are covered by test_load_module.
with warnings.catch_warnings():
warnings.simplefilter("ignore", ImportWarning)
self.setUp(is_package=False)
with test_util.uncache(self.name):
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
module = self.loader.load_module(self.name)
self.verify_module(module)
self.assertNotHasAttr(module, '__path__')
def test_get_source_encoding(self):
# Source is considered encoded in UTF-8 by default unless otherwise
# specified by an encoding line.
source = "_ = 'ü'"
self.loader.source = source.encode('utf-8')
returned_source = self.loader.get_source(self.name)
self.assertEqual(returned_source, source)
source = "# coding: latin-1\n_ = ü"
self.loader.source = source.encode('latin-1')
returned_source = self.loader.get_source(self.name)
self.assertEqual(returned_source, source)
(Frozen_SourceOnlyLoaderTests,
Source_SourceOnlyLoaderTests
) = test_util.test_both(SourceOnlyLoaderTests, util=util,
loader_mock=SPLIT_SOL)
@unittest.skipIf(sys.dont_write_bytecode, "sys.dont_write_bytecode is true")
class SourceLoaderBytecodeTests(SourceLoaderTestHarness):
"""Test importlib.abc.SourceLoader's use of bytecode.
Source-only testing handled by SourceOnlyLoaderTests.
"""
def verify_code(self, code_object, *, bytecode_written=False):
super().verify_code(code_object)
if bytecode_written:
self.assertIn(self.cached, self.loader.written)
data = bytearray(self.util.MAGIC_NUMBER)
data.extend(self.init._pack_uint32(0))
data.extend(self.init._pack_uint32(self.loader.source_mtime))
data.extend(self.init._pack_uint32(self.loader.source_size))
# Make sure there's > 1 reference to code_object so that the
# marshaled representation below matches the cached representation
l = [code_object]
data.extend(marshal.dumps(code_object))
self.assertEqual(self.loader.written[self.cached], bytes(data))
def test_code_with_everything(self):
# When everything should work.
code_object = self.loader.get_code(self.name)
self.verify_code(code_object)
def test_no_bytecode(self):
# If no bytecode exists then move on to the source.
self.loader.bytecode_path = "<does not exist>"
# Sanity check
with self.assertRaises(OSError):
bytecode_path = self.util.cache_from_source(self.path)
self.loader.get_data(bytecode_path)
code_object = self.loader.get_code(self.name)
self.verify_code(code_object, bytecode_written=True)
def test_code_bad_timestamp(self):
# Bytecode is only used when the timestamp matches the source EXACTLY.
for source_mtime in (0, 2):
assert source_mtime != self.loader.source_mtime
original = self.loader.source_mtime
self.loader.source_mtime = source_mtime
# If bytecode is used then EOFError would be raised by marshal.
self.loader.bytecode = self.loader.bytecode[8:]
code_object = self.loader.get_code(self.name)
self.verify_code(code_object, bytecode_written=True)
self.loader.source_mtime = original
def test_code_bad_magic(self):
# Skip over bytecode with a bad magic number.
self.setUp(magic=b'0000')
# If bytecode is used then EOFError would be raised by marshal.
self.loader.bytecode = self.loader.bytecode[8:]
code_object = self.loader.get_code(self.name)
self.verify_code(code_object, bytecode_written=True)
def test_dont_write_bytecode(self):
# Bytecode is not written if sys.dont_write_bytecode is true.
# Can assume it is false already thanks to the skipIf class decorator.
try:
sys.dont_write_bytecode = True
self.loader.bytecode_path = "<does not exist>"
code_object = self.loader.get_code(self.name)
self.assertNotIn(self.cached, self.loader.written)
finally:
sys.dont_write_bytecode = False
def test_no_set_data(self):
# If set_data is not defined, one can still read bytecode.
self.setUp(magic=b'0000')
original_set_data = self.loader.__class__.mro()[1].set_data
try:
del self.loader.__class__.mro()[1].set_data
code_object = self.loader.get_code(self.name)
self.verify_code(code_object)
finally:
self.loader.__class__.mro()[1].set_data = original_set_data
def test_set_data_raises_exceptions(self):
# Raising NotImplementedError or OSError is okay for set_data.
def raise_exception(exc):
def closure(*args, **kwargs):
raise exc
return closure
self.setUp(magic=b'0000')
self.loader.set_data = raise_exception(NotImplementedError)
code_object = self.loader.get_code(self.name)
self.verify_code(code_object)
(Frozen_SLBytecodeTests,
SourceSLBytecodeTests
) = test_util.test_both(SourceLoaderBytecodeTests, init=init, util=util,
loader_mock=SPLIT_SL)
class SourceLoaderGetSourceTests:
"""Tests for importlib.abc.SourceLoader.get_source()."""
def test_default_encoding(self):
# Should have no problems with UTF-8 text.
name = 'mod'
mock = self.SourceOnlyLoaderMock('mod.file')
source = 'x = "ü"'
mock.source = source.encode('utf-8')
returned_source = mock.get_source(name)
self.assertEqual(returned_source, source)
def test_decoded_source(self):
# Decoding should work.
name = 'mod'
mock = self.SourceOnlyLoaderMock("mod.file")
source = "# coding: Latin-1\nx='ü'"
assert source.encode('latin-1') != source.encode('utf-8')
mock.source = source.encode('latin-1')
returned_source = mock.get_source(name)
self.assertEqual(returned_source, source)
def test_universal_newlines(self):
# PEP 302 says universal newlines should be used.
name = 'mod'
mock = self.SourceOnlyLoaderMock('mod.file')
source = "x = 42\r\ny = -13\r\n"
mock.source = source.encode('utf-8')
expect = io.IncrementalNewlineDecoder(None, True).decode(source)
self.assertEqual(mock.get_source(name), expect)
(Frozen_SourceOnlyLoaderGetSourceTests,
Source_SourceOnlyLoaderGetSourceTests
) = test_util.test_both(SourceLoaderGetSourceTests,
SourceOnlyLoaderMock=SPLIT_SOL)
class SourceLoaderDeprecationWarningsTests(unittest.TestCase):
"""Tests SourceLoader deprecation warnings."""
def test_deprecated_path_mtime(self):
from importlib.abc import SourceLoader
class DummySourceLoader(SourceLoader):
def get_data(self, path):
return b''
def get_filename(self, fullname):
return 'foo.py'
def path_stats(self, path):
return {'mtime': 1}
loader = DummySourceLoader()
with self.assertWarnsRegex(
DeprecationWarning,
r"SourceLoader\.path_mtime is deprecated in favour of "
r"SourceLoader\.path_stats\(\)\."
):
loader.path_mtime('foo.py')
if __name__ == '__main__':
unittest.main()