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# Test the module type
import unittest
from test.support import run_unittest, gc_collect
import sys
ModuleType = type(sys)
class ModuleTests(unittest.TestCase):
def test_uninitialized(self):
# An uninitialized module has no __dict__ or __name__,
# and __doc__ is None
foo = ModuleType.__new__(ModuleType)
self.assertTrue(foo.__dict__ is None)
self.assertRaises(SystemError, dir, foo)
try:
s = foo.__name__
self.fail("__name__ = %s" % repr(s))
except AttributeError:
pass
self.assertEqual(foo.__doc__, ModuleType.__doc__)
def test_no_docstring(self):
# Regularly initialized module, no docstring
foo = ModuleType("foo")
self.assertEqual(foo.__name__, "foo")
self.assertEqual(foo.__doc__, None)
self.assertEqual(foo.__dict__, {"__name__": "foo", "__doc__": None})
def test_ascii_docstring(self):
# ASCII docstring
foo = ModuleType("foo", "foodoc")
self.assertEqual(foo.__name__, "foo")
self.assertEqual(foo.__doc__, "foodoc")
self.assertEqual(foo.__dict__,
{"__name__": "foo", "__doc__": "foodoc"})
def test_unicode_docstring(self):
# Unicode docstring
foo = ModuleType("foo", "foodoc\u1234")
self.assertEqual(foo.__name__, "foo")
self.assertEqual(foo.__doc__, "foodoc\u1234")
self.assertEqual(foo.__dict__,
{"__name__": "foo", "__doc__": "foodoc\u1234"})
def test_reinit(self):
# Reinitialization should not replace the __dict__
foo = ModuleType("foo", "foodoc\u1234")
foo.bar = 42
d = foo.__dict__
foo.__init__("foo", "foodoc")
self.assertEqual(foo.__name__, "foo")
self.assertEqual(foo.__doc__, "foodoc")
self.assertEqual(foo.bar, 42)
self.assertEqual(foo.__dict__,
{"__name__": "foo", "__doc__": "foodoc", "bar": 42})
self.assertTrue(foo.__dict__ is d)
@unittest.expectedFailure
def test_dont_clear_dict(self):
# See issue 7140.
def f():
foo = ModuleType("foo")
foo.bar = 4
return foo
gc_collect()
self.assertEqual(f().__dict__["bar"], 4)
def test_clear_dict_in_ref_cycle(self):
destroyed = []
m = ModuleType("foo")
m.destroyed = destroyed
s = """class A:
def __init__(self, l):
self.l = l
def __del__(self):
self.l.append(1)
a = A(destroyed)"""
exec(s, m.__dict__)
del m
gc_collect()
self.assertEqual(destroyed, [1])
def test_main():
run_unittest(ModuleTests)
if __name__ == '__main__':
test_main()
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