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from .. import abc
from .. import util
machinery = util.import_importlib('importlib.machinery')
import sys
import types
import unittest
@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
class LoaderTests(abc.LoaderTests):
"""Test load_module() for built-in modules."""
def setUp(self):
self.verification = {'__name__': 'errno', '__package__': '',
'__loader__': self.machinery.BuiltinImporter}
def verify(self, module):
"""Verify that the module matches against what it should have."""
self.assertIsInstance(module, types.ModuleType)
for attr, value in self.verification.items():
self.assertEqual(getattr(module, attr), value)
self.assertIn(module.__name__, sys.modules)
def load_module(self, name):
return self.machinery.BuiltinImporter.load_module(name)
def test_module(self):
# Common case.
with util.uncache(util.BUILTINS.good_name):
module = self.load_module(util.BUILTINS.good_name)
self.verify(module)
# Built-in modules cannot be a package.
test_package = test_lacking_parent = None
# No way to force an import failure.
test_state_after_failure = None
def test_module_reuse(self):
# Test that the same module is used in a reload.
with util.uncache(util.BUILTINS.good_name):
module1 = self.load_module(util.BUILTINS.good_name)
module2 = self.load_module(util.BUILTINS.good_name)
self.assertIs(module1, module2)
def test_unloadable(self):
name = 'dssdsdfff'
assert name not in sys.builtin_module_names
with self.assertRaises(ImportError) as cm:
self.load_module(name)
self.assertEqual(cm.exception.name, name)
def test_already_imported(self):
# Using the name of a module already imported but not a built-in should
# still fail.
module_name = 'builtin_reload_test'
assert module_name not in sys.builtin_module_names
with util.uncache(module_name):
module = types.ModuleType(module_name)
sys.modules[module_name] = module
with self.assertRaises(ImportError) as cm:
self.load_module(module_name)
self.assertEqual(cm.exception.name, module_name)
(Frozen_LoaderTests,
Source_LoaderTests
) = util.test_both(LoaderTests, machinery=machinery)
@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
class InspectLoaderTests:
"""Tests for InspectLoader methods for BuiltinImporter."""
def test_get_code(self):
# There is no code object.
result = self.machinery.BuiltinImporter.get_code(util.BUILTINS.good_name)
self.assertIsNone(result)
def test_get_source(self):
# There is no source.
result = self.machinery.BuiltinImporter.get_source(util.BUILTINS.good_name)
self.assertIsNone(result)
def test_is_package(self):
# Cannot be a package.
result = self.machinery.BuiltinImporter.is_package(util.BUILTINS.good_name)
self.assertFalse(result)
@unittest.skipIf(util.BUILTINS.bad_name is None, 'all modules are built in')
def test_not_builtin(self):
# Modules not built-in should raise ImportError.
for meth_name in ('get_code', 'get_source', 'is_package'):
method = getattr(self.machinery.BuiltinImporter, meth_name)
with self.assertRaises(ImportError) as cm:
method(util.BUILTINS.bad_name)
(Frozen_InspectLoaderTests,
Source_InspectLoaderTests
) = util.test_both(InspectLoaderTests, machinery=machinery)
if __name__ == '__main__':
unittest.main()