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# Test the module type
import unittest
import weakref
from test.support import run_unittest, gc_collect
from test.script_helper import assert_python_ok
import sys
ModuleType = type(sys)
class FullLoader:
@classmethod
def module_repr(cls, m):
return "<module '{}' (crafted)>".format(m.__name__)
class BareLoader:
pass
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.assertIs(foo.__loader__, None)
self.assertIs(foo.__package__, None)
self.assertIs(foo.__spec__, None)
self.assertEqual(foo.__dict__, {"__name__": "foo", "__doc__": None,
"__loader__": None, "__package__": None,
"__spec__": 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",
"__loader__": None, "__package__": None,
"__spec__": None})
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",
"__loader__": None, "__package__": None,
"__spec__": None})
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,
"__loader__": None, "__package__": None, "__spec__": None})
self.assertTrue(foo.__dict__ is d)
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_weakref(self):
m = ModuleType("foo")
wr = weakref.ref(m)
self.assertIs(wr(), m)
del m
gc_collect()
self.assertIs(wr(), None)
def test_module_repr_minimal(self):
# reprs when modules have no __file__, __name__, or __loader__
m = ModuleType('foo')
del m.__name__
self.assertEqual(repr(m), "<module '?'>")
def test_module_repr_with_name(self):
m = ModuleType('foo')
self.assertEqual(repr(m), "<module 'foo'>")
def test_module_repr_with_name_and_filename(self):
m = ModuleType('foo')
m.__file__ = '/tmp/foo.py'
self.assertEqual(repr(m), "<module 'foo' from '/tmp/foo.py'>")
def test_module_repr_with_filename_only(self):
m = ModuleType('foo')
del m.__name__
m.__file__ = '/tmp/foo.py'
self.assertEqual(repr(m), "<module '?' from '/tmp/foo.py'>")
def test_module_repr_with_loader_as_None(self):
m = ModuleType('foo')
assert m.__loader__ is None
self.assertEqual(repr(m), "<module 'foo'>")
def test_module_repr_with_bare_loader_but_no_name(self):
m = ModuleType('foo')
del m.__name__
# Yes, a class not an instance.
m.__loader__ = BareLoader
loader_repr = repr(BareLoader)
self.assertEqual(
repr(m), "<module '?' ({})>".format(loader_repr))
def test_module_repr_with_full_loader_but_no_name(self):
# m.__loader__.module_repr() will fail because the module has no
# m.__name__. This exception will get suppressed and instead the
# loader's repr will be used.
m = ModuleType('foo')
del m.__name__
# Yes, a class not an instance.
m.__loader__ = FullLoader
loader_repr = repr(FullLoader)
self.assertEqual(
repr(m), "<module '?' ({})>".format(loader_repr))
def test_module_repr_with_bare_loader(self):
m = ModuleType('foo')
# Yes, a class not an instance.
m.__loader__ = BareLoader
module_repr = repr(BareLoader)
self.assertEqual(
repr(m), "<module 'foo' ({})>".format(module_repr))
def test_module_repr_with_full_loader(self):
m = ModuleType('foo')
# Yes, a class not an instance.
m.__loader__ = FullLoader
self.assertEqual(
repr(m), "<module 'foo' (crafted)>")
def test_module_repr_with_bare_loader_and_filename(self):
# Because the loader has no module_repr(), use the file name.
m = ModuleType('foo')
# Yes, a class not an instance.
m.__loader__ = BareLoader
m.__file__ = '/tmp/foo.py'
self.assertEqual(repr(m), "<module 'foo' from '/tmp/foo.py'>")
def test_module_repr_with_full_loader_and_filename(self):
# Even though the module has an __file__, use __loader__.module_repr()
m = ModuleType('foo')
# Yes, a class not an instance.
m.__loader__ = FullLoader
m.__file__ = '/tmp/foo.py'
self.assertEqual(repr(m), "<module 'foo' (crafted)>")
def test_module_repr_builtin(self):
self.assertEqual(repr(sys), "<module 'sys' (built-in)>")
def test_module_repr_source(self):
r = repr(unittest)
starts_with = "<module 'unittest' from '"
ends_with = "__init__.py'>"
self.assertEqual(r[:len(starts_with)], starts_with,
'{!r} does not start with {!r}'.format(r, starts_with))
self.assertEqual(r[-len(ends_with):], ends_with,
'{!r} does not end with {!r}'.format(r, ends_with))
def test_module_finalization_at_shutdown(self):
# Module globals and builtins should still be available during shutdown
rc, out, err = assert_python_ok("-c", "from test import final_a")
self.assertFalse(err)
lines = out.splitlines()
self.assertEqual(set(lines), {
b"x = a",
b"x = b",
b"final_a.x = a",
b"final_b.x = b",
b"len = len",
b"shutil.rmtree = rmtree"})
# frozen and namespace module reprs are tested in importlib.
def test_main():
run_unittest(ModuleTests)
if __name__ == '__main__':
test_main()
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