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from importlib import machinery
import imp
import unittest
from .. import abc
from .. import util
from test.support import captured_stdout
class LoaderTests(abc.LoaderTests):
def test_module(self):
with util.uncache('__hello__'), captured_stdout() as stdout:
module = machinery.FrozenImporter.load_module('__hello__')
check = {'__name__': '__hello__',
'__package__': '',
'__loader__': machinery.FrozenImporter,
}
for attr, value in check.items():
self.assertEqual(getattr(module, attr), value)
self.assertEqual(stdout.getvalue(), 'Hello world!\n')
self.assertFalse(hasattr(module, '__file__'))
def test_package(self):
with util.uncache('__phello__'), captured_stdout() as stdout:
module = machinery.FrozenImporter.load_module('__phello__')
check = {'__name__': '__phello__',
'__package__': '__phello__',
'__path__': ['__phello__'],
'__loader__': machinery.FrozenImporter,
}
for attr, value in check.items():
attr_value = getattr(module, attr)
self.assertEqual(attr_value, value,
"for __phello__.%s, %r != %r" %
(attr, attr_value, value))
self.assertEqual(stdout.getvalue(), 'Hello world!\n')
self.assertFalse(hasattr(module, '__file__'))
def test_lacking_parent(self):
with util.uncache('__phello__', '__phello__.spam'), \
captured_stdout() as stdout:
module = machinery.FrozenImporter.load_module('__phello__.spam')
check = {'__name__': '__phello__.spam',
'__package__': '__phello__',
'__loader__': machinery.FrozenImporter,
}
for attr, value in check.items():
attr_value = getattr(module, attr)
self.assertEqual(attr_value, value,
"for __phello__.spam.%s, %r != %r" %
(attr, attr_value, value))
self.assertEqual(stdout.getvalue(), 'Hello world!\n')
self.assertFalse(hasattr(module, '__file__'))
def test_module_reuse(self):
with util.uncache('__hello__'), captured_stdout() as stdout:
module1 = machinery.FrozenImporter.load_module('__hello__')
module2 = machinery.FrozenImporter.load_module('__hello__')
self.assertIs(module1, module2)
self.assertEqual(stdout.getvalue(),
'Hello world!\nHello world!\n')
def test_module_repr(self):
with util.uncache('__hello__'), captured_stdout():
module = machinery.FrozenImporter.load_module('__hello__')
self.assertEqual(repr(module),
"<module '__hello__' (frozen)>")
# No way to trigger an error in a frozen module.
test_state_after_failure = None
def test_unloadable(self):
assert machinery.FrozenImporter.find_module('_not_real') is None
with self.assertRaises(ImportError) as cm:
machinery.FrozenImporter.load_module('_not_real')
self.assertEqual(cm.exception.name, '_not_real')
class InspectLoaderTests(unittest.TestCase):
"""Tests for the InspectLoader methods for FrozenImporter."""
def test_get_code(self):
# Make sure that the code object is good.
name = '__hello__'
with captured_stdout() as stdout:
code = machinery.FrozenImporter.get_code(name)
mod = imp.new_module(name)
exec(code, mod.__dict__)
self.assertTrue(hasattr(mod, 'initialized'))
self.assertEqual(stdout.getvalue(), 'Hello world!\n')
def test_get_source(self):
# Should always return None.
result = machinery.FrozenImporter.get_source('__hello__')
self.assertIsNone(result)
def test_is_package(self):
# Should be able to tell what is a package.
test_for = (('__hello__', False), ('__phello__', True),
('__phello__.spam', False))
for name, is_package in test_for:
result = machinery.FrozenImporter.is_package(name)
self.assertEqual(bool(result), is_package)
def test_failure(self):
# Raise ImportError for modules that are not frozen.
for meth_name in ('get_code', 'get_source', 'is_package'):
method = getattr(machinery.FrozenImporter, meth_name)
with self.assertRaises(ImportError) as cm:
method('importlib')
self.assertEqual(cm.exception.name, 'importlib')
def test_main():
from test.support import run_unittest
run_unittest(LoaderTests, InspectLoaderTests)
if __name__ == '__main__':
test_main()