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import abc import importlib import io import sys import types import pathlib import contextlib from . import data01 from ..abc import ResourceReader from .compat.py39 import import_helper, os_helper from . import zip as zip_ from importlib.machinery import ModuleSpec class Reader(ResourceReader): def __init__(self, **kwargs): vars(self).update(kwargs) def get_resource_reader(self, package): return self def open_resource(self, path): self._path = path if isinstance(self.file, Exception): raise self.file return self.file def resource_path(self, path_): self._path = path_ if isinstance(self.path, Exception): raise self.path return self.path def is_resource(self, path_): self._path = path_ if isinstance(self.path, Exception): raise self.path def part(entry): return entry.split('/') return any( len(parts) == 1 and parts[0] == path_ for parts in map(part, self._contents) ) def contents(self): if isinstance(self.path, Exception): raise self.path yield from self._contents def create_package_from_loader(loader, is_package=True): name = 'testingpackage' module = types.ModuleType(name) spec = ModuleSpec(name, loader, origin='does-not-exist', is_package=is_package) module.__spec__ = spec module.__loader__ = loader return module def create_package(file=None, path=None, is_package=True, contents=()): return create_package_from_loader( Reader(file=file, path=path, _contents=contents), is_package, ) class CommonTests(metaclass=abc.ABCMeta): """ Tests shared by test_open, test_path, and test_read. """ @abc.abstractmethod def execute(self, package, path): """ Call the pertinent legacy API function (e.g. open_text, path) on package and path. """ def test_package_name(self): """ Passing in the package name should succeed. """ self.execute(data01.__name__, 'utf-8.file') def test_package_object(self): """ Passing in the package itself should succeed. """ self.execute(data01, 'utf-8.file') def test_string_path(self): """ Passing in a string for the path should succeed. """ path = 'utf-8.file' self.execute(data01, path) def test_pathlib_path(self): """ Passing in a pathlib.PurePath object for the path should succeed. """ path = pathlib.PurePath('utf-8.file') self.execute(data01, path) def test_importing_module_as_side_effect(self): """ The anchor package can already be imported. """ del sys.modules[data01.__name__] self.execute(data01.__name__, 'utf-8.file') def test_missing_path(self): """ Attempting to open or read or request the path for a non-existent path should succeed if open_resource can return a viable data stream. """ bytes_data = io.BytesIO(b'Hello, world!') package = create_package(file=bytes_data, path=FileNotFoundError()) self.execute(package, 'utf-8.file') self.assertEqual(package.__loader__._path, 'utf-8.file') def test_extant_path(self): # Attempting to open or read or request the path when the # path does exist should still succeed. Does not assert # anything about the result. bytes_data = io.BytesIO(b'Hello, world!') # any path that exists path = __file__ package = create_package(file=bytes_data, path=path) self.execute(package, 'utf-8.file') self.assertEqual(package.__loader__._path, 'utf-8.file') def test_useless_loader(self): package = create_package(file=FileNotFoundError(), path=FileNotFoundError()) with self.assertRaises(FileNotFoundError): self.execute(package, 'utf-8.file') class ZipSetupBase: ZIP_MODULE = 'data01' def setUp(self): self.fixtures = contextlib.ExitStack() self.addCleanup(self.fixtures.close) self.fixtures.enter_context(import_helper.isolated_modules()) temp_dir = self.fixtures.enter_context(os_helper.temp_dir()) modules = pathlib.Path(temp_dir) / 'zipped modules.zip' src_path = pathlib.Path(__file__).parent.joinpath(self.ZIP_MODULE) self.fixtures.enter_context( import_helper.DirsOnSysPath(str(zip_.make_zip_file(src_path, modules))) ) self.data = importlib.import_module(self.ZIP_MODULE) class ZipSetup(ZipSetupBase): pass