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"""Test case-sensitivity (PEP 235)."""
from .. import util
importlib = util.import_importlib('importlib')
machinery = util.import_importlib('importlib.machinery')
import os
from test import support as test_support
import unittest
@util.case_insensitive_tests
class CaseSensitivityTest(util.CASEOKTestBase):
"""PEP 235 dictates that on case-preserving, case-insensitive file systems
that imports are case-sensitive unless the PYTHONCASEOK environment
variable is set."""
name = 'MoDuLe'
assert name != name.lower()
def finder(self, path):
return self.machinery.FileFinder(path,
(self.machinery.SourceFileLoader,
self.machinery.SOURCE_SUFFIXES),
(self.machinery.SourcelessFileLoader,
self.machinery.BYTECODE_SUFFIXES))
def sensitivity_test(self):
"""Look for a module with matching and non-matching sensitivity."""
sensitive_pkg = 'sensitive.{0}'.format(self.name)
insensitive_pkg = 'insensitive.{0}'.format(self.name.lower())
context = util.create_modules(insensitive_pkg, sensitive_pkg)
with context as mapping:
sensitive_path = os.path.join(mapping['.root'], 'sensitive')
insensitive_path = os.path.join(mapping['.root'], 'insensitive')
sensitive_finder = self.finder(sensitive_path)
insensitive_finder = self.finder(insensitive_path)
return self.find(sensitive_finder), self.find(insensitive_finder)
def test_sensitive(self):
with test_support.EnvironmentVarGuard() as env:
env.unset('PYTHONCASEOK')
self.caseok_env_changed(should_exist=False)
sensitive, insensitive = self.sensitivity_test()
self.assertIsNotNone(sensitive)
self.assertIn(self.name, sensitive.get_filename(self.name))
self.assertIsNone(insensitive)
def test_insensitive(self):
with test_support.EnvironmentVarGuard() as env:
env.set('PYTHONCASEOK', '1')
self.caseok_env_changed(should_exist=True)
sensitive, insensitive = self.sensitivity_test()
self.assertIsNotNone(sensitive)
self.assertIn(self.name, sensitive.get_filename(self.name))
self.assertIsNotNone(insensitive)
self.assertIn(self.name, insensitive.get_filename(self.name))
class CaseSensitivityTestPEP302(CaseSensitivityTest):
def find(self, finder):
return finder.find_module(self.name)
(Frozen_CaseSensitivityTestPEP302,
Source_CaseSensitivityTestPEP302
) = util.test_both(CaseSensitivityTestPEP302, importlib=importlib,
machinery=machinery)
class CaseSensitivityTestPEP451(CaseSensitivityTest):
def find(self, finder):
found = finder.find_spec(self.name)
return found.loader if found is not None else found
(Frozen_CaseSensitivityTestPEP451,
Source_CaseSensitivityTestPEP451
) = util.test_both(CaseSensitivityTestPEP451, importlib=importlib,
machinery=machinery)
if __name__ == '__main__':
unittest.main()