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"""Test case-sensitivity (PEP 235)."""
from importlib import _bootstrap
from .. import util
from . import util as source_util
import imp
import os
import sys
from test import support as test_support
import unittest
@util.case_insensitive_tests
class CaseSensitivityTest(unittest.TestCase):
"""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 find(self, path):
finder = _bootstrap.FileFinder(path,
(_bootstrap.SourceFileLoader,
_bootstrap._SOURCE_SUFFIXES,
True),
(_bootstrap.SourcelessFileLoader,
[_bootstrap._BYTECODE_SUFFIX],
True))
return finder.find_module(self.name)
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 = source_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')
return self.find(sensitive_path), self.find(insensitive_path)
def test_sensitive(self):
with test_support.EnvironmentVarGuard() as env:
env.unset('PYTHONCASEOK')
if b'PYTHONCASEOK' in _bootstrap._os.environ:
self.skipTest('os.environ changes not reflected in '
'_os.environ')
sensitive, insensitive = self.sensitivity_test()
self.assertTrue(hasattr(sensitive, 'load_module'))
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')
if b'PYTHONCASEOK' not in _bootstrap._os.environ:
self.skipTest('os.environ changes not reflected in '
'_os.environ')
sensitive, insensitive = self.sensitivity_test()
self.assertTrue(hasattr(sensitive, 'load_module'))
self.assertIn(self.name, sensitive.get_filename(self.name))
self.assertTrue(hasattr(insensitive, 'load_module'))
self.assertIn(self.name, insensitive.get_filename(self.name))
def test_main():
test_support.run_unittest(CaseSensitivityTest)
if __name__ == '__main__':
test_main()
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