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a254807761
gh-116307: Create a new import helper 'isolated modules' and use that instead of 'Clean Import' to ensure that tests from importlib_resources don't leave modules in sys.modules.
113 lines
3.2 KiB
Python
113 lines
3.2 KiB
Python
import typing
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import textwrap
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import unittest
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import warnings
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import importlib
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import contextlib
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from importlib import resources
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from importlib.resources.abc import Traversable
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from . import data01
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from . import util
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from . import _path
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from test.support import os_helper
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from test.support import import_helper
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@contextlib.contextmanager
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def suppress_known_deprecation():
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with warnings.catch_warnings(record=True) as ctx:
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warnings.simplefilter('default', category=DeprecationWarning)
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yield ctx
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class FilesTests:
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def test_read_bytes(self):
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files = resources.files(self.data)
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actual = files.joinpath('utf-8.file').read_bytes()
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assert actual == b'Hello, UTF-8 world!\n'
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def test_read_text(self):
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files = resources.files(self.data)
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actual = files.joinpath('utf-8.file').read_text(encoding='utf-8')
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assert actual == 'Hello, UTF-8 world!\n'
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@unittest.skipUnless(
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hasattr(typing, 'runtime_checkable'),
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"Only suitable when typing supports runtime_checkable",
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)
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def test_traversable(self):
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assert isinstance(resources.files(self.data), Traversable)
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def test_old_parameter(self):
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"""
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Files used to take a 'package' parameter. Make sure anyone
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passing by name is still supported.
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"""
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with suppress_known_deprecation():
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resources.files(package=self.data)
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class OpenDiskTests(FilesTests, unittest.TestCase):
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def setUp(self):
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self.data = data01
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class OpenZipTests(FilesTests, util.ZipSetup, unittest.TestCase):
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pass
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class OpenNamespaceTests(FilesTests, unittest.TestCase):
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def setUp(self):
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from . import namespacedata01
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self.data = namespacedata01
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class SiteDir:
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def setUp(self):
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self.fixtures = contextlib.ExitStack()
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self.addCleanup(self.fixtures.close)
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self.site_dir = self.fixtures.enter_context(os_helper.temp_dir())
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self.fixtures.enter_context(import_helper.DirsOnSysPath(self.site_dir))
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self.fixtures.enter_context(import_helper.isolated_modules())
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class ModulesFilesTests(SiteDir, unittest.TestCase):
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def test_module_resources(self):
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"""
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A module can have resources found adjacent to the module.
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"""
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spec = {
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'mod.py': '',
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'res.txt': 'resources are the best',
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}
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_path.build(spec, self.site_dir)
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import mod
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actual = resources.files(mod).joinpath('res.txt').read_text(encoding='utf-8')
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assert actual == spec['res.txt']
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class ImplicitContextFilesTests(SiteDir, unittest.TestCase):
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def test_implicit_files(self):
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"""
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Without any parameter, files() will infer the location as the caller.
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"""
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spec = {
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'somepkg': {
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'__init__.py': textwrap.dedent(
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"""
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import importlib.resources as res
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val = res.files().joinpath('res.txt').read_text(encoding='utf-8')
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"""
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),
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'res.txt': 'resources are the best',
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},
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}
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_path.build(spec, self.site_dir)
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assert importlib.import_module('somepkg').val == 'resources are the best'
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if __name__ == '__main__':
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unittest.main()
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