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# coding: utf-8
import re
import textwrap
import unittest
import importlib.metadata
from . import fixtures
from importlib.metadata import (
Distribution, EntryPoint,
PackageNotFoundError, distributions,
entry_points, metadata, version,
)
class BasicTests(fixtures.DistInfoPkg, unittest.TestCase):
version_pattern = r'\d+\.\d+(\.\d)?'
def test_retrieves_version_of_self(self):
dist = Distribution.from_name('distinfo-pkg')
assert isinstance(dist.version, str)
assert re.match(self.version_pattern, dist.version)
def test_for_name_does_not_exist(self):
with self.assertRaises(PackageNotFoundError):
Distribution.from_name('does-not-exist')
def test_new_style_classes(self):
self.assertIsInstance(Distribution, type)
class ImportTests(fixtures.DistInfoPkg, unittest.TestCase):
def test_import_nonexistent_module(self):
# Ensure that the MetadataPathFinder does not crash an import of a
# non-existant module.
with self.assertRaises(ImportError):
importlib.import_module('does_not_exist')
def test_resolve(self):
entries = dict(entry_points()['entries'])
ep = entries['main']
self.assertEqual(ep.load().__name__, "main")
def test_resolve_without_attr(self):
ep = EntryPoint(
name='ep',
value='importlib.metadata',
group='grp',
)
assert ep.load() is importlib.metadata
class NameNormalizationTests(
fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
@staticmethod
def pkg_with_dashes(site_dir):
"""
Create minimal metadata for a package with dashes
in the name (and thus underscores in the filename).
"""
metadata_dir = site_dir / 'my_pkg.dist-info'
metadata_dir.mkdir()
metadata = metadata_dir / 'METADATA'
with metadata.open('w') as strm:
strm.write('Version: 1.0\n')
return 'my-pkg'
def test_dashes_in_dist_name_found_as_underscores(self):
"""
For a package with a dash in the name, the dist-info metadata
uses underscores in the name. Ensure the metadata loads.
"""
pkg_name = self.pkg_with_dashes(self.site_dir)
assert version(pkg_name) == '1.0'
@staticmethod
def pkg_with_mixed_case(site_dir):
"""
Create minimal metadata for a package with mixed case
in the name.
"""
metadata_dir = site_dir / 'CherryPy.dist-info'
metadata_dir.mkdir()
metadata = metadata_dir / 'METADATA'
with metadata.open('w') as strm:
strm.write('Version: 1.0\n')
return 'CherryPy'
def test_dist_name_found_as_any_case(self):
"""
Ensure the metadata loads when queried with any case.
"""
pkg_name = self.pkg_with_mixed_case(self.site_dir)
assert version(pkg_name) == '1.0'
assert version(pkg_name.lower()) == '1.0'
assert version(pkg_name.upper()) == '1.0'
class NonASCIITests(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
@staticmethod
def pkg_with_non_ascii_description(site_dir):
"""
Create minimal metadata for a package with non-ASCII in
the description.
"""
metadata_dir = site_dir / 'portend.dist-info'
metadata_dir.mkdir()
metadata = metadata_dir / 'METADATA'
with metadata.open('w', encoding='utf-8') as fp:
fp.write('Description: pôrˈtend\n')
return 'portend'
@staticmethod
def pkg_with_non_ascii_description_egg_info(site_dir):
"""
Create minimal metadata for an egg-info package with
non-ASCII in the description.
"""
metadata_dir = site_dir / 'portend.dist-info'
metadata_dir.mkdir()
metadata = metadata_dir / 'METADATA'
with metadata.open('w', encoding='utf-8') as fp:
fp.write(textwrap.dedent("""
Name: portend
pôrˈtend
""").lstrip())
return 'portend'
def test_metadata_loads(self):
pkg_name = self.pkg_with_non_ascii_description(self.site_dir)
meta = metadata(pkg_name)
assert meta['Description'] == 'pôrˈtend'
def test_metadata_loads_egg_info(self):
pkg_name = self.pkg_with_non_ascii_description_egg_info(self.site_dir)
meta = metadata(pkg_name)
assert meta.get_payload() == 'pôrˈtend\n'
class DiscoveryTests(fixtures.EggInfoPkg,
fixtures.DistInfoPkg,
unittest.TestCase):
def test_package_discovery(self):
dists = list(distributions())
assert all(
isinstance(dist, Distribution)
for dist in dists
)
assert any(
dist.metadata['Name'] == 'egginfo-pkg'
for dist in dists
)
assert any(
dist.metadata['Name'] == 'distinfo-pkg'
for dist in dists
)
class DirectoryTest(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
def test(self):
# make an `EGG-INFO` directory that's unrelated
self.site_dir.joinpath('EGG-INFO').mkdir()
# used to crash with `IsADirectoryError`
self.assertIsNone(version('unknown-package'))
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