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from test.support import run_unittest, unload
import unittest
import sys
import imp
import pkgutil
import os
import os.path
import tempfile
import shutil
import zipfile
class PkgutilTests(unittest.TestCase):
def setUp(self):
self.dirname = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, self.dirname)
sys.path.insert(0, self.dirname)
def tearDown(self):
del sys.path[0]
def test_getdata_filesys(self):
pkg = 'test_getdata_filesys'
# Include a LF and a CRLF, to test that binary data is read back
RESOURCE_DATA = b'Hello, world!\nSecond line\r\nThird line'
# Make a package with some resources
package_dir = os.path.join(self.dirname, pkg)
os.mkdir(package_dir)
# Empty init.py
f = open(os.path.join(package_dir, '__init__.py'), "wb")
f.close()
# Resource files, res.txt, sub/res.txt
f = open(os.path.join(package_dir, 'res.txt'), "wb")
f.write(RESOURCE_DATA)
f.close()
os.mkdir(os.path.join(package_dir, 'sub'))
f = open(os.path.join(package_dir, 'sub', 'res.txt'), "wb")
f.write(RESOURCE_DATA)
f.close()
# Check we can read the resources
res1 = pkgutil.get_data(pkg, 'res.txt')
self.assertEqual(res1, RESOURCE_DATA)
res2 = pkgutil.get_data(pkg, 'sub/res.txt')
self.assertEqual(res2, RESOURCE_DATA)
del sys.modules[pkg]
def test_getdata_zipfile(self):
zip = 'test_getdata_zipfile.zip'
pkg = 'test_getdata_zipfile'
# Include a LF and a CRLF, to test that binary data is read back
RESOURCE_DATA = b'Hello, world!\nSecond line\r\nThird line'
# Make a package with some resources
zip_file = os.path.join(self.dirname, zip)
z = zipfile.ZipFile(zip_file, 'w')
# Empty init.py
z.writestr(pkg + '/__init__.py', "")
# Resource files, res.txt, sub/res.txt
z.writestr(pkg + '/res.txt', RESOURCE_DATA)
z.writestr(pkg + '/sub/res.txt', RESOURCE_DATA)
z.close()
# Check we can read the resources
sys.path.insert(0, zip_file)
res1 = pkgutil.get_data(pkg, 'res.txt')
self.assertEqual(res1, RESOURCE_DATA)
res2 = pkgutil.get_data(pkg, 'sub/res.txt')
self.assertEqual(res2, RESOURCE_DATA)
names = []
for loader, name, ispkg in pkgutil.iter_modules([zip_file]):
names.append(name)
self.assertEqual(names, ['test_getdata_zipfile'])
del sys.path[0]
del sys.modules[pkg]
def test_unreadable_dir_on_syspath(self):
# issue7367 - walk_packages failed if unreadable dir on sys.path
package_name = "unreadable_package"
d = os.path.join(self.dirname, package_name)
# this does not appear to create an unreadable dir on Windows
# but the test should not fail anyway
os.mkdir(d, 0)
self.addCleanup(os.rmdir, d)
for t in pkgutil.walk_packages(path=[self.dirname]):
self.fail("unexpected package found")
class PkgutilPEP302Tests(unittest.TestCase):
class MyTestLoader(object):
def load_module(self, fullname):
# Create an empty module
mod = sys.modules.setdefault(fullname, imp.new_module(fullname))
mod.__file__ = "<%s>" % self.__class__.__name__
mod.__loader__ = self
# Make it a package
mod.__path__ = []
# Count how many times the module is reloaded
mod.__dict__['loads'] = mod.__dict__.get('loads',0) + 1
return mod
def get_data(self, path):
return "Hello, world!"
class MyTestImporter(object):
def find_module(self, fullname, path=None):
return PkgutilPEP302Tests.MyTestLoader()
def setUp(self):
sys.meta_path.insert(0, self.MyTestImporter())
def tearDown(self):
del sys.meta_path[0]
def test_getdata_pep302(self):
# Use a dummy importer/loader
self.assertEqual(pkgutil.get_data('foo', 'dummy'), "Hello, world!")
del sys.modules['foo']
def test_alreadyloaded(self):
# Ensure that get_data works without reloading - the "loads" module
# variable in the example loader should count how many times a reload
# occurs.
import foo
self.assertEqual(foo.loads, 1)
self.assertEqual(pkgutil.get_data('foo', 'dummy'), "Hello, world!")
self.assertEqual(foo.loads, 1)
del sys.modules['foo']
class ExtendPathTests(unittest.TestCase):
def create_init(self, pkgname):
dirname = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, dirname)
sys.path.insert(0, dirname)
pkgdir = os.path.join(dirname, pkgname)
os.mkdir(pkgdir)
with open(os.path.join(pkgdir, '__init__.py'), 'w') as fl:
fl.write('from pkgutil import extend_path\n__path__ = extend_path(__path__, __name__)\n')
return dirname
def create_submodule(self, dirname, pkgname, submodule_name, value):
module_name = os.path.join(dirname, pkgname, submodule_name + '.py')
with open(module_name, 'w') as fl:
print('value={}'.format(value), file=fl)
def setUp(self):
# Create 2 directories on sys.path
self.pkgname = 'foo'
self.dirname_0 = self.create_init(self.pkgname)
self.dirname_1 = self.create_init(self.pkgname)
def tearDown(self):
del sys.path[0]
del sys.path[0]
del sys.modules['foo']
del sys.modules['foo.bar']
del sys.modules['foo.baz']
def test_simple(self):
self.create_submodule(self.dirname_0, self.pkgname, 'bar', 0)
self.create_submodule(self.dirname_1, self.pkgname, 'baz', 1)
import foo.bar
import foo.baz
# Ensure we read the expected values
self.assertEqual(foo.bar.value, 0)
self.assertEqual(foo.baz.value, 1)
# Ensure the path is set up correctly
self.assertEqual(sorted(foo.__path__),
sorted([os.path.join(self.dirname_0, self.pkgname),
os.path.join(self.dirname_1, self.pkgname)]))
# XXX: test .pkg files
class NestedNamespacePackageTest(unittest.TestCase):
def setUp(self):
self.basedir = tempfile.mkdtemp()
self.old_path = sys.path[:]
def tearDown(self):
sys.path[:] = self.old_path
shutil.rmtree(self.basedir)
def create_module(self, name, contents):
base, final = name.rsplit('.', 1)
base_path = os.path.join(self.basedir, base.replace('.', os.path.sep))
os.makedirs(base_path, exist_ok=True)
with open(os.path.join(base_path, final + ".py"), 'w') as f:
f.write(contents)
def test_nested(self):
pkgutil_boilerplate = (
'import pkgutil; '
'__path__ = pkgutil.extend_path(__path__, __name__)')
self.create_module('a.pkg.__init__', pkgutil_boilerplate)
self.create_module('b.pkg.__init__', pkgutil_boilerplate)
self.create_module('a.pkg.subpkg.__init__', pkgutil_boilerplate)
self.create_module('b.pkg.subpkg.__init__', pkgutil_boilerplate)
self.create_module('a.pkg.subpkg.c', 'c = 1')
self.create_module('b.pkg.subpkg.d', 'd = 2')
sys.path.insert(0, os.path.join(self.basedir, 'a'))
sys.path.insert(0, os.path.join(self.basedir, 'b'))
import pkg
self.addCleanup(unload, 'pkg')
self.assertEqual(len(pkg.__path__), 2)
import pkg.subpkg
self.addCleanup(unload, 'pkg.subpkg')
self.assertEqual(len(pkg.subpkg.__path__), 2)
from pkg.subpkg.c import c
from pkg.subpkg.d import d
self.assertEqual(c, 1)
self.assertEqual(d, 2)
def test_main():
run_unittest(PkgutilTests, PkgutilPEP302Tests, ExtendPathTests,
NestedNamespacePackageTest)
# this is necessary if test is run repeated (like when finding leaks)
import zipimport
zipimport._zip_directory_cache.clear()
if __name__ == '__main__':
test_main()
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