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import io
import unittest
from importlib import resources
from . import data01
from .resources import util
class CommonTests(util.CommonTests, unittest.TestCase):
def execute(self, package, path):
with resources.as_file(resources.files(package).joinpath(path)):
pass
class PathTests:
def test_reading(self):
# Path should be readable.
# Test also implicitly verifies the returned object is a pathlib.Path
# instance.
target = resources.files(self.data) / 'utf-8.file'
with resources.as_file(target) as path:
self.assertTrue(path.name.endswith("utf-8.file"), repr(path))
# pathlib.Path.read_text() was introduced in Python 3.5.
with path.open('r', encoding='utf-8') as file:
text = file.read()
self.assertEqual('Hello, UTF-8 world!\n', text)
class PathDiskTests(PathTests, unittest.TestCase):
data = data01
def test_natural_path(self):
# Guarantee the internal implementation detail that
# file-system-backed resources do not get the tempdir
# treatment.
target = resources.files(self.data) / 'utf-8.file'
with resources.as_file(target) as path:
assert 'data' in str(path)
class PathMemoryTests(PathTests, unittest.TestCase):
def setUp(self):
file = io.BytesIO(b'Hello, UTF-8 world!\n')
self.addCleanup(file.close)
self.data = util.create_package(
file=file, path=FileNotFoundError("package exists only in memory")
)
self.data.__spec__.origin = None
self.data.__spec__.has_location = False
class PathZipTests(PathTests, util.ZipSetup, unittest.TestCase):
def test_remove_in_context_manager(self):
# It is not an error if the file that was temporarily stashed on the
# file system is removed inside the `with` stanza.
target = resources.files(self.data) / 'utf-8.file'
with resources.as_file(target) as path:
path.unlink()
if __name__ == '__main__':
unittest.main()