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import typing
import textwrap
import unittest
import warnings
import importlib
import contextlib
from importlib import resources
from importlib.resources.abc import Traversable
from . import data01
from . import util
from . import _path
from test.support import os_helper
from test.support import import_helper
@contextlib.contextmanager
def suppress_known_deprecation():
with warnings.catch_warnings(record=True) as ctx:
warnings.simplefilter('default', category=DeprecationWarning)
yield ctx
class FilesTests:
def test_read_bytes(self):
files = resources.files(self.data)
actual = files.joinpath('utf-8.file').read_bytes()
assert actual == b'Hello, UTF-8 world!\n'
def test_read_text(self):
files = resources.files(self.data)
actual = files.joinpath('utf-8.file').read_text(encoding='utf-8')
assert actual == 'Hello, UTF-8 world!\n'
@unittest.skipUnless(
hasattr(typing, 'runtime_checkable'),
"Only suitable when typing supports runtime_checkable",
)
def test_traversable(self):
assert isinstance(resources.files(self.data), Traversable)
def test_old_parameter(self):
"""
Files used to take a 'package' parameter. Make sure anyone
passing by name is still supported.
"""
with suppress_known_deprecation():
resources.files(package=self.data)
class OpenDiskTests(FilesTests, unittest.TestCase):
def setUp(self):
self.data = data01
class OpenZipTests(FilesTests, util.ZipSetup, unittest.TestCase):
pass
class OpenNamespaceTests(FilesTests, unittest.TestCase):
def setUp(self):
from . import namespacedata01
self.data = namespacedata01
class SiteDir:
def setUp(self):
self.fixtures = contextlib.ExitStack()
self.addCleanup(self.fixtures.close)
self.site_dir = self.fixtures.enter_context(os_helper.temp_dir())
self.fixtures.enter_context(import_helper.DirsOnSysPath(self.site_dir))
self.fixtures.enter_context(import_helper.CleanImport())
class ModulesFilesTests(SiteDir, unittest.TestCase):
def test_module_resources(self):
"""
A module can have resources found adjacent to the module.
"""
spec = {
'mod.py': '',
'res.txt': 'resources are the best',
}
_path.build(spec, self.site_dir)
import mod
actual = resources.files(mod).joinpath('res.txt').read_text(encoding='utf-8')
assert actual == spec['res.txt']
class ImplicitContextFilesTests(SiteDir, unittest.TestCase):
def test_implicit_files(self):
"""
Without any parameter, files() will infer the location as the caller.
"""
spec = {
'somepkg': {
'__init__.py': textwrap.dedent(
"""
import importlib.resources as res
val = res.files().joinpath('res.txt').read_text(encoding='utf-8')
"""
),
'res.txt': 'resources are the best',
},
}
_path.build(spec, self.site_dir)
assert importlib.import_module('somepkg').val == 'resources are the best'
if __name__ == '__main__':
unittest.main()
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