mirror of https://github.com/python/cpython
428 lines
14 KiB
Python
428 lines
14 KiB
Python
import re
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import pickle
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import unittest
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import warnings
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import importlib.metadata
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import contextlib
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import itertools
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try:
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import pyfakefs.fake_filesystem_unittest as ffs
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except ImportError:
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from .stubs import fake_filesystem_unittest as ffs
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from . import fixtures
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from ._context import suppress
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from importlib.metadata import (
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Distribution,
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EntryPoint,
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PackageNotFoundError,
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_unique,
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distributions,
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entry_points,
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metadata,
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packages_distributions,
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version,
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)
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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 BasicTests(fixtures.DistInfoPkg, unittest.TestCase):
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version_pattern = r'\d+\.\d+(\.\d)?'
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def test_retrieves_version_of_self(self):
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dist = Distribution.from_name('distinfo-pkg')
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assert isinstance(dist.version, str)
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assert re.match(self.version_pattern, dist.version)
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def test_for_name_does_not_exist(self):
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with self.assertRaises(PackageNotFoundError):
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Distribution.from_name('does-not-exist')
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def test_package_not_found_mentions_metadata(self):
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"""
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When a package is not found, that could indicate that the
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package is not installed or that it is installed without
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metadata. Ensure the exception mentions metadata to help
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guide users toward the cause. See #124.
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"""
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with self.assertRaises(PackageNotFoundError) as ctx:
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Distribution.from_name('does-not-exist')
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assert "metadata" in str(ctx.exception)
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# expected to fail until ABC is enforced
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@suppress(AssertionError)
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@suppress_known_deprecation()
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def test_abc_enforced(self):
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with self.assertRaises(TypeError):
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type('DistributionSubclass', (Distribution,), {})()
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@fixtures.parameterize(
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dict(name=None),
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dict(name=''),
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)
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def test_invalid_inputs_to_from_name(self, name):
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with self.assertRaises(Exception):
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Distribution.from_name(name)
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class ImportTests(fixtures.DistInfoPkg, unittest.TestCase):
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def test_import_nonexistent_module(self):
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# Ensure that the MetadataPathFinder does not crash an import of a
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# non-existent module.
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with self.assertRaises(ImportError):
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importlib.import_module('does_not_exist')
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def test_resolve(self):
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ep = entry_points(group='entries')['main']
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self.assertEqual(ep.load().__name__, "main")
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def test_entrypoint_with_colon_in_name(self):
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ep = entry_points(group='entries')['ns:sub']
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self.assertEqual(ep.value, 'mod:main')
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def test_resolve_without_attr(self):
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ep = EntryPoint(
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name='ep',
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value='importlib.metadata',
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group='grp',
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)
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assert ep.load() is importlib.metadata
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class NameNormalizationTests(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
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@staticmethod
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def make_pkg(name):
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"""
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Create minimal metadata for a dist-info package with
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the indicated name on the file system.
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"""
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return {
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f'{name}.dist-info': {
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'METADATA': 'VERSION: 1.0\n',
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},
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}
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def test_dashes_in_dist_name_found_as_underscores(self):
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"""
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For a package with a dash in the name, the dist-info metadata
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uses underscores in the name. Ensure the metadata loads.
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"""
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fixtures.build_files(self.make_pkg('my_pkg'), self.site_dir)
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assert version('my-pkg') == '1.0'
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def test_dist_name_found_as_any_case(self):
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"""
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Ensure the metadata loads when queried with any case.
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"""
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pkg_name = 'CherryPy'
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fixtures.build_files(self.make_pkg(pkg_name), self.site_dir)
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assert version(pkg_name) == '1.0'
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assert version(pkg_name.lower()) == '1.0'
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assert version(pkg_name.upper()) == '1.0'
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def test_unique_distributions(self):
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"""
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Two distributions varying only by non-normalized name on
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the file system should resolve as the same.
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"""
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fixtures.build_files(self.make_pkg('abc'), self.site_dir)
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before = list(_unique(distributions()))
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alt_site_dir = self.fixtures.enter_context(fixtures.tempdir())
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self.fixtures.enter_context(self.add_sys_path(alt_site_dir))
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fixtures.build_files(self.make_pkg('ABC'), alt_site_dir)
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after = list(_unique(distributions()))
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assert len(after) == len(before)
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class NonASCIITests(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
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@staticmethod
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def pkg_with_non_ascii_description(site_dir):
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"""
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Create minimal metadata for a package with non-ASCII in
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the description.
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"""
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contents = {
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'portend.dist-info': {
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'METADATA': 'Description: pôrˈtend',
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},
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}
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fixtures.build_files(contents, site_dir)
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return 'portend'
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@staticmethod
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def pkg_with_non_ascii_description_egg_info(site_dir):
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"""
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Create minimal metadata for an egg-info package with
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non-ASCII in the description.
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"""
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contents = {
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'portend.dist-info': {
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'METADATA': """
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Name: portend
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pôrˈtend""",
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},
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}
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fixtures.build_files(contents, site_dir)
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return 'portend'
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def test_metadata_loads(self):
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pkg_name = self.pkg_with_non_ascii_description(self.site_dir)
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meta = metadata(pkg_name)
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assert meta['Description'] == 'pôrˈtend'
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def test_metadata_loads_egg_info(self):
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pkg_name = self.pkg_with_non_ascii_description_egg_info(self.site_dir)
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meta = metadata(pkg_name)
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assert meta['Description'] == 'pôrˈtend'
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class DiscoveryTests(
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fixtures.EggInfoPkg,
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fixtures.EggInfoPkgPipInstalledNoToplevel,
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fixtures.EggInfoPkgPipInstalledNoModules,
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fixtures.EggInfoPkgSourcesFallback,
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fixtures.DistInfoPkg,
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unittest.TestCase,
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):
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def test_package_discovery(self):
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dists = list(distributions())
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assert all(isinstance(dist, Distribution) for dist in dists)
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assert any(dist.metadata['Name'] == 'egginfo-pkg' for dist in dists)
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assert any(dist.metadata['Name'] == 'egg_with_module-pkg' for dist in dists)
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assert any(dist.metadata['Name'] == 'egg_with_no_modules-pkg' for dist in dists)
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assert any(dist.metadata['Name'] == 'sources_fallback-pkg' for dist in dists)
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assert any(dist.metadata['Name'] == 'distinfo-pkg' for dist in dists)
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def test_invalid_usage(self):
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with self.assertRaises(ValueError):
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list(distributions(context='something', name='else'))
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class DirectoryTest(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
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def test_egg_info(self):
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# make an `EGG-INFO` directory that's unrelated
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self.site_dir.joinpath('EGG-INFO').mkdir()
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# used to crash with `IsADirectoryError`
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with self.assertRaises(PackageNotFoundError):
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version('unknown-package')
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def test_egg(self):
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egg = self.site_dir.joinpath('foo-3.6.egg')
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egg.mkdir()
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with self.add_sys_path(egg):
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with self.assertRaises(PackageNotFoundError):
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version('foo')
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class MissingSysPath(fixtures.OnSysPath, unittest.TestCase):
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site_dir = '/does-not-exist'
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def test_discovery(self):
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"""
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Discovering distributions should succeed even if
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there is an invalid path on sys.path.
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"""
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importlib.metadata.distributions()
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class InaccessibleSysPath(fixtures.OnSysPath, ffs.TestCase):
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site_dir = '/access-denied'
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def setUp(self):
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super().setUp()
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self.setUpPyfakefs()
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self.fs.create_dir(self.site_dir, perm_bits=000)
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def test_discovery(self):
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"""
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Discovering distributions should succeed even if
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there is an invalid path on sys.path.
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"""
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list(importlib.metadata.distributions())
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class TestEntryPoints(unittest.TestCase):
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def __init__(self, *args):
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super().__init__(*args)
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self.ep = importlib.metadata.EntryPoint(
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name='name', value='value', group='group'
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)
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def test_entry_point_pickleable(self):
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revived = pickle.loads(pickle.dumps(self.ep))
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assert revived == self.ep
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def test_positional_args(self):
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"""
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Capture legacy (namedtuple) construction, discouraged.
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"""
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EntryPoint('name', 'value', 'group')
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def test_immutable(self):
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"""EntryPoints should be immutable"""
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with self.assertRaises(AttributeError):
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self.ep.name = 'badactor'
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def test_repr(self):
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assert 'EntryPoint' in repr(self.ep)
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assert 'name=' in repr(self.ep)
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assert "'name'" in repr(self.ep)
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def test_hashable(self):
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"""EntryPoints should be hashable"""
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hash(self.ep)
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def test_module(self):
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assert self.ep.module == 'value'
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def test_attr(self):
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assert self.ep.attr is None
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def test_sortable(self):
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"""
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EntryPoint objects are sortable, but result is undefined.
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"""
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sorted(
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[
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EntryPoint(name='b', value='val', group='group'),
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EntryPoint(name='a', value='val', group='group'),
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]
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)
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class FileSystem(
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fixtures.OnSysPath, fixtures.SiteDir, fixtures.FileBuilder, unittest.TestCase
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):
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def test_unicode_dir_on_sys_path(self):
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"""
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Ensure a Unicode subdirectory of a directory on sys.path
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does not crash.
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"""
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fixtures.build_files(
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{self.unicode_filename(): {}},
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prefix=self.site_dir,
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)
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list(distributions())
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class PackagesDistributionsPrebuiltTest(fixtures.ZipFixtures, unittest.TestCase):
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def test_packages_distributions_example(self):
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self._fixture_on_path('example-21.12-py3-none-any.whl')
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assert packages_distributions()['example'] == ['example']
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def test_packages_distributions_example2(self):
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"""
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Test packages_distributions on a wheel built
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by trampolim.
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"""
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self._fixture_on_path('example2-1.0.0-py3-none-any.whl')
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assert packages_distributions()['example2'] == ['example2']
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class PackagesDistributionsTest(
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fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase
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):
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def test_packages_distributions_neither_toplevel_nor_files(self):
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"""
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Test a package built without 'top-level.txt' or a file list.
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"""
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fixtures.build_files(
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{
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'trim_example-1.0.0.dist-info': {
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'METADATA': """
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Name: trim_example
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Version: 1.0.0
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""",
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}
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},
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prefix=self.site_dir,
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)
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packages_distributions()
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def test_packages_distributions_all_module_types(self):
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"""
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Test top-level modules detected on a package without 'top-level.txt'.
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"""
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suffixes = importlib.machinery.all_suffixes()
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metadata = dict(
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METADATA="""
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Name: all_distributions
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Version: 1.0.0
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""",
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)
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files = {
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'all_distributions-1.0.0.dist-info': metadata,
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}
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for i, suffix in enumerate(suffixes):
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files.update(
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{
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f'importable-name {i}{suffix}': '',
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f'in_namespace_{i}': {
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f'mod{suffix}': '',
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},
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f'in_package_{i}': {
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'__init__.py': '',
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f'mod{suffix}': '',
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},
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}
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)
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metadata.update(RECORD=fixtures.build_record(files))
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fixtures.build_files(files, prefix=self.site_dir)
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distributions = packages_distributions()
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for i in range(len(suffixes)):
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assert distributions[f'importable-name {i}'] == ['all_distributions']
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assert distributions[f'in_namespace_{i}'] == ['all_distributions']
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assert distributions[f'in_package_{i}'] == ['all_distributions']
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assert not any(name.endswith('.dist-info') for name in distributions)
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class PackagesDistributionsEggTest(
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fixtures.EggInfoPkg,
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fixtures.EggInfoPkgPipInstalledNoToplevel,
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fixtures.EggInfoPkgPipInstalledNoModules,
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fixtures.EggInfoPkgSourcesFallback,
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unittest.TestCase,
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):
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def test_packages_distributions_on_eggs(self):
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"""
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Test old-style egg packages with a variation of 'top_level.txt',
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'SOURCES.txt', and 'installed-files.txt', available.
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"""
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distributions = packages_distributions()
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def import_names_from_package(package_name):
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return {
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import_name
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for import_name, package_names in distributions.items()
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if package_name in package_names
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}
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# egginfo-pkg declares one import ('mod') via top_level.txt
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assert import_names_from_package('egginfo-pkg') == {'mod'}
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# egg_with_module-pkg has one import ('egg_with_module') inferred from
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# installed-files.txt (top_level.txt is missing)
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assert import_names_from_package('egg_with_module-pkg') == {'egg_with_module'}
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# egg_with_no_modules-pkg should not be associated with any import names
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# (top_level.txt is empty, and installed-files.txt has no .py files)
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assert import_names_from_package('egg_with_no_modules-pkg') == set()
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# sources_fallback-pkg has one import ('sources_fallback') inferred from
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# SOURCES.txt (top_level.txt and installed-files.txt is missing)
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assert import_names_from_package('sources_fallback-pkg') == {'sources_fallback'}
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