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cpython/Lib/test/test_winreg.py
Zackery Spytz e223ba13d8 bpo-32587: Make winreg.REG_MULTI_SZ support zero-length strings (#13239) 
* bpo-32587: Make winreg.REG_MULTI_SZ support PendingFileRenameOperations

* Address review comments.
2019-09-09 02:26:15 -07:00

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# Test the windows specific win32reg module.
# Only win32reg functions not hit here: FlushKey, LoadKey and SaveKey
import os, sys, errno
import unittest
from test import support
import threading
from platform import machine, win32_edition
# Do this first so test will be skipped if module doesn't exist
support.import_module('winreg', required_on=['win'])
# Now import everything
from winreg import *
try:
REMOTE_NAME = sys.argv[sys.argv.index("--remote")+1]
except (IndexError, ValueError):
REMOTE_NAME = None
# tuple of (major, minor)
WIN_VER = sys.getwindowsversion()[:2]
# Some tests should only run on 64-bit architectures where WOW64 will be.
WIN64_MACHINE = True if machine() == "AMD64" else False
# Starting with Windows 7 and Windows Server 2008 R2, WOW64 no longer uses
# registry reflection and formerly reflected keys are shared instead.
# Windows 7 and Windows Server 2008 R2 are version 6.1. Due to this, some
# tests are only valid up until 6.1
HAS_REFLECTION = True if WIN_VER < (6, 1) else False
# Use a per-process key to prevent concurrent test runs (buildbot!) from
# stomping on each other.
test_key_base = "Python Test Key [%d] - Delete Me" % (os.getpid(),)
test_key_name = "SOFTWARE\\" + test_key_base
# On OS'es that support reflection we should test with a reflected key
test_reflect_key_name = "SOFTWARE\\Classes\\" + test_key_base
test_data = [
("Int Value", 45, REG_DWORD),
("Qword Value", 0x1122334455667788, REG_QWORD),
("String Val", "A string value", REG_SZ),
("StringExpand", "The path is %path%", REG_EXPAND_SZ),
("Multi-string", ["Lots", "of", "string", "values"], REG_MULTI_SZ),
("Multi-nul", ["", "", "", ""], REG_MULTI_SZ),
("Raw Data", b"binary\x00data", REG_BINARY),
("Big String", "x"*(2**14-1), REG_SZ),
("Big Binary", b"x"*(2**14), REG_BINARY),
# Two and three kanjis, meaning: "Japan" and "Japanese")
("Japanese 日本", "日本語", REG_SZ),
]
class BaseWinregTests(unittest.TestCase):
def setUp(self):
# Make sure that the test key is absent when the test
# starts.
self.delete_tree(HKEY_CURRENT_USER, test_key_name)
def delete_tree(self, root, subkey):
try:
hkey = OpenKey(root, subkey, 0, KEY_ALL_ACCESS)
except OSError:
# subkey does not exist
return
while True:
try:
subsubkey = EnumKey(hkey, 0)
except OSError:
# no more subkeys
break
self.delete_tree(hkey, subsubkey)
CloseKey(hkey)
DeleteKey(root, subkey)
def _write_test_data(self, root_key, subkeystr="sub_key",
CreateKey=CreateKey):
# Set the default value for this key.
SetValue(root_key, test_key_name, REG_SZ, "Default value")
key = CreateKey(root_key, test_key_name)
self.assertTrue(key.handle != 0)
# Create a sub-key
sub_key = CreateKey(key, subkeystr)
# Give the sub-key some named values
for value_name, value_data, value_type in test_data:
SetValueEx(sub_key, value_name, 0, value_type, value_data)
# Check we wrote as many items as we thought.
nkeys, nvalues, since_mod = QueryInfoKey(key)
self.assertEqual(nkeys, 1, "Not the correct number of sub keys")
self.assertEqual(nvalues, 1, "Not the correct number of values")
nkeys, nvalues, since_mod = QueryInfoKey(sub_key)
self.assertEqual(nkeys, 0, "Not the correct number of sub keys")
self.assertEqual(nvalues, len(test_data),
"Not the correct number of values")
# Close this key this way...
# (but before we do, copy the key as an integer - this allows
# us to test that the key really gets closed).
int_sub_key = int(sub_key)
CloseKey(sub_key)
try:
QueryInfoKey(int_sub_key)
self.fail("It appears the CloseKey() function does "
"not close the actual key!")
except OSError:
pass
# ... and close that key that way :-)
int_key = int(key)
key.Close()
try:
QueryInfoKey(int_key)
self.fail("It appears the key.Close() function "
"does not close the actual key!")
except OSError:
pass
def _read_test_data(self, root_key, subkeystr="sub_key", OpenKey=OpenKey):
# Check we can get default value for this key.
val = QueryValue(root_key, test_key_name)
self.assertEqual(val, "Default value",
"Registry didn't give back the correct value")
key = OpenKey(root_key, test_key_name)
# Read the sub-keys
with OpenKey(key, subkeystr) as sub_key:
# Check I can enumerate over the values.
index = 0
while 1:
try:
data = EnumValue(sub_key, index)
except OSError:
break
self.assertEqual(data in test_data, True,
"Didn't read back the correct test data")
index = index + 1
self.assertEqual(index, len(test_data),
"Didn't read the correct number of items")
# Check I can directly access each item
for value_name, value_data, value_type in test_data:
read_val, read_typ = QueryValueEx(sub_key, value_name)
self.assertEqual(read_val, value_data,
"Could not directly read the value")
self.assertEqual(read_typ, value_type,
"Could not directly read the value")
sub_key.Close()
# Enumerate our main key.
read_val = EnumKey(key, 0)
self.assertEqual(read_val, subkeystr, "Read subkey value wrong")
try:
EnumKey(key, 1)
self.fail("Was able to get a second key when I only have one!")
except OSError:
pass
key.Close()
def _delete_test_data(self, root_key, subkeystr="sub_key"):
key = OpenKey(root_key, test_key_name, 0, KEY_ALL_ACCESS)
sub_key = OpenKey(key, subkeystr, 0, KEY_ALL_ACCESS)
# It is not necessary to delete the values before deleting
# the key (although subkeys must not exist). We delete them
# manually just to prove we can :-)
for value_name, value_data, value_type in test_data:
DeleteValue(sub_key, value_name)
nkeys, nvalues, since_mod = QueryInfoKey(sub_key)
self.assertEqual(nkeys, 0, "subkey not empty before delete")
self.assertEqual(nvalues, 0, "subkey not empty before delete")
sub_key.Close()
DeleteKey(key, subkeystr)
try:
# Shouldn't be able to delete it twice!
DeleteKey(key, subkeystr)
self.fail("Deleting the key twice succeeded")
except OSError:
pass
key.Close()
DeleteKey(root_key, test_key_name)
# Opening should now fail!
try:
key = OpenKey(root_key, test_key_name)
self.fail("Could open the non-existent key")
except OSError: # Use this error name this time
pass
def _test_all(self, root_key, subkeystr="sub_key"):
self._write_test_data(root_key, subkeystr)
self._read_test_data(root_key, subkeystr)
self._delete_test_data(root_key, subkeystr)
def _test_named_args(self, key, sub_key):
with CreateKeyEx(key=key, sub_key=sub_key, reserved=0,
access=KEY_ALL_ACCESS) as ckey:
self.assertTrue(ckey.handle != 0)
with OpenKeyEx(key=key, sub_key=sub_key, reserved=0,
access=KEY_ALL_ACCESS) as okey:
self.assertTrue(okey.handle != 0)
class LocalWinregTests(BaseWinregTests):
def test_registry_works(self):
self._test_all(HKEY_CURRENT_USER)
self._test_all(HKEY_CURRENT_USER, "日本-subkey")
def test_registry_works_extended_functions(self):
# Substitute the regular CreateKey and OpenKey calls with their
# extended counterparts.
# Note: DeleteKeyEx is not used here because it is platform dependent
cke = lambda key, sub_key: CreateKeyEx(key, sub_key, 0, KEY_ALL_ACCESS)
self._write_test_data(HKEY_CURRENT_USER, CreateKey=cke)
oke = lambda key, sub_key: OpenKeyEx(key, sub_key, 0, KEY_READ)
self._read_test_data(HKEY_CURRENT_USER, OpenKey=oke)
self._delete_test_data(HKEY_CURRENT_USER)
def test_named_arguments(self):
self._test_named_args(HKEY_CURRENT_USER, test_key_name)
# Use the regular DeleteKey to clean up
# DeleteKeyEx takes named args and is tested separately
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_connect_registry_to_local_machine_works(self):
# perform minimal ConnectRegistry test which just invokes it
h = ConnectRegistry(None, HKEY_LOCAL_MACHINE)
self.assertNotEqual(h.handle, 0)
h.Close()
self.assertEqual(h.handle, 0)
def test_nonexistent_remote_registry(self):
connect = lambda: ConnectRegistry("abcdefghijkl", HKEY_CURRENT_USER)
self.assertRaises(OSError, connect)
def testExpandEnvironmentStrings(self):
r = ExpandEnvironmentStrings("%windir%\\test")
self.assertEqual(type(r), str)
self.assertEqual(r, os.environ["windir"] + "\\test")
def test_context_manager(self):
# ensure that the handle is closed if an exception occurs
try:
with ConnectRegistry(None, HKEY_LOCAL_MACHINE) as h:
self.assertNotEqual(h.handle, 0)
raise OSError
except OSError:
self.assertEqual(h.handle, 0)
def test_changing_value(self):
# Issue2810: A race condition in 2.6 and 3.1 may cause
# EnumValue or QueryValue to raise "WindowsError: More data is
# available"
done = False
class VeryActiveThread(threading.Thread):
def run(self):
with CreateKey(HKEY_CURRENT_USER, test_key_name) as key:
use_short = True
long_string = 'x'*2000
while not done:
s = 'x' if use_short else long_string
use_short = not use_short
SetValue(key, 'changing_value', REG_SZ, s)
thread = VeryActiveThread()
thread.start()
try:
with CreateKey(HKEY_CURRENT_USER,
test_key_name+'\\changing_value') as key:
for _ in range(1000):
num_subkeys, num_values, t = QueryInfoKey(key)
for i in range(num_values):
name = EnumValue(key, i)
QueryValue(key, name[0])
finally:
done = True
thread.join()
DeleteKey(HKEY_CURRENT_USER, test_key_name+'\\changing_value')
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_long_key(self):
# Issue2810, in 2.6 and 3.1 when the key name was exactly 256
# characters, EnumKey raised "WindowsError: More data is
# available"
name = 'x'*256
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as key:
SetValue(key, name, REG_SZ, 'x')
num_subkeys, num_values, t = QueryInfoKey(key)
EnumKey(key, 0)
finally:
DeleteKey(HKEY_CURRENT_USER, '\\'.join((test_key_name, name)))
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_dynamic_key(self):
# Issue2810, when the value is dynamically generated, these
# raise "WindowsError: More data is available" in 2.6 and 3.1
try:
EnumValue(HKEY_PERFORMANCE_DATA, 0)
except OSError as e:
if e.errno in (errno.EPERM, errno.EACCES):
self.skipTest("access denied to registry key "
"(are you running in a non-interactive session?)")
raise
QueryValueEx(HKEY_PERFORMANCE_DATA, "")
# Reflection requires XP x64/Vista at a minimum. XP doesn't have this stuff
# or DeleteKeyEx so make sure their use raises NotImplementedError
@unittest.skipUnless(WIN_VER < (5, 2), "Requires Windows XP")
def test_reflection_unsupported(self):
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as ck:
self.assertNotEqual(ck.handle, 0)
key = OpenKey(HKEY_CURRENT_USER, test_key_name)
self.assertNotEqual(key.handle, 0)
with self.assertRaises(NotImplementedError):
DisableReflectionKey(key)
with self.assertRaises(NotImplementedError):
EnableReflectionKey(key)
with self.assertRaises(NotImplementedError):
QueryReflectionKey(key)
with self.assertRaises(NotImplementedError):
DeleteKeyEx(HKEY_CURRENT_USER, test_key_name)
finally:
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_setvalueex_value_range(self):
# Test for Issue #14420, accept proper ranges for SetValueEx.
# Py2Reg, which gets called by SetValueEx, was using PyLong_AsLong,
# thus raising OverflowError. The implementation now uses
# PyLong_AsUnsignedLong to match DWORD's size.
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as ck:
self.assertNotEqual(ck.handle, 0)
SetValueEx(ck, "test_name", None, REG_DWORD, 0x80000000)
finally:
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_queryvalueex_return_value(self):
# Test for Issue #16759, return unsigned int from QueryValueEx.
# Reg2Py, which gets called by QueryValueEx, was returning a value
# generated by PyLong_FromLong. The implementation now uses
# PyLong_FromUnsignedLong to match DWORD's size.
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as ck:
self.assertNotEqual(ck.handle, 0)
test_val = 0x80000000
SetValueEx(ck, "test_name", None, REG_DWORD, test_val)
ret_val, ret_type = QueryValueEx(ck, "test_name")
self.assertEqual(ret_type, REG_DWORD)
self.assertEqual(ret_val, test_val)
finally:
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_setvalueex_crash_with_none_arg(self):
# Test for Issue #21151, segfault when None is passed to SetValueEx
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as ck:
self.assertNotEqual(ck.handle, 0)
test_val = None
SetValueEx(ck, "test_name", 0, REG_BINARY, test_val)
ret_val, ret_type = QueryValueEx(ck, "test_name")
self.assertEqual(ret_type, REG_BINARY)
self.assertEqual(ret_val, test_val)
finally:
DeleteKey(HKEY_CURRENT_USER, test_key_name)
def test_read_string_containing_null(self):
# Test for issue 25778: REG_SZ should not contain null characters
try:
with CreateKey(HKEY_CURRENT_USER, test_key_name) as ck:
self.assertNotEqual(ck.handle, 0)
test_val = "A string\x00 with a null"
SetValueEx(ck, "test_name", 0, REG_SZ, test_val)
ret_val, ret_type = QueryValueEx(ck, "test_name")
self.assertEqual(ret_type, REG_SZ)
self.assertEqual(ret_val, "A string")
finally:
DeleteKey(HKEY_CURRENT_USER, test_key_name)
@unittest.skipUnless(REMOTE_NAME, "Skipping remote registry tests")
class RemoteWinregTests(BaseWinregTests):
def test_remote_registry_works(self):
remote_key = ConnectRegistry(REMOTE_NAME, HKEY_CURRENT_USER)
self._test_all(remote_key)
@unittest.skipUnless(WIN64_MACHINE, "x64 specific registry tests")
class Win64WinregTests(BaseWinregTests):
def test_named_arguments(self):
self._test_named_args(HKEY_CURRENT_USER, test_key_name)
# Clean up and also exercise the named arguments
DeleteKeyEx(key=HKEY_CURRENT_USER, sub_key=test_key_name,
access=KEY_ALL_ACCESS, reserved=0)
@unittest.skipIf(win32_edition() in ('WindowsCoreHeadless', 'IoTEdgeOS'), "APIs not available on WindowsCoreHeadless")
def test_reflection_functions(self):
# Test that we can call the query, enable, and disable functions
# on a key which isn't on the reflection list with no consequences.
with OpenKey(HKEY_LOCAL_MACHINE, "Software") as key:
# HKLM\Software is redirected but not reflected in all OSes
self.assertTrue(QueryReflectionKey(key))
self.assertIsNone(EnableReflectionKey(key))
self.assertIsNone(DisableReflectionKey(key))
self.assertTrue(QueryReflectionKey(key))
@unittest.skipUnless(HAS_REFLECTION, "OS doesn't support reflection")
def test_reflection(self):
# Test that we can create, open, and delete keys in the 32-bit
# area. Because we are doing this in a key which gets reflected,
# test the differences of 32 and 64-bit keys before and after the
# reflection occurs (ie. when the created key is closed).
try:
with CreateKeyEx(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_ALL_ACCESS | KEY_WOW64_32KEY) as created_key:
self.assertNotEqual(created_key.handle, 0)
# The key should now be available in the 32-bit area
with OpenKey(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_ALL_ACCESS | KEY_WOW64_32KEY) as key:
self.assertNotEqual(key.handle, 0)
# Write a value to what currently is only in the 32-bit area
SetValueEx(created_key, "", 0, REG_SZ, "32KEY")
# The key is not reflected until created_key is closed.
# The 64-bit version of the key should not be available yet.
open_fail = lambda: OpenKey(HKEY_CURRENT_USER,
test_reflect_key_name, 0,
KEY_READ | KEY_WOW64_64KEY)
self.assertRaises(OSError, open_fail)
# Now explicitly open the 64-bit version of the key
with OpenKey(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_ALL_ACCESS | KEY_WOW64_64KEY) as key:
self.assertNotEqual(key.handle, 0)
# Make sure the original value we set is there
self.assertEqual("32KEY", QueryValue(key, ""))
# Set a new value, which will get reflected to 32-bit
SetValueEx(key, "", 0, REG_SZ, "64KEY")
# Reflection uses a "last-writer wins policy, so the value we set
# on the 64-bit key should be the same on 32-bit
with OpenKey(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_READ | KEY_WOW64_32KEY) as key:
self.assertEqual("64KEY", QueryValue(key, ""))
finally:
DeleteKeyEx(HKEY_CURRENT_USER, test_reflect_key_name,
KEY_WOW64_32KEY, 0)
@unittest.skipUnless(HAS_REFLECTION, "OS doesn't support reflection")
def test_disable_reflection(self):
# Make use of a key which gets redirected and reflected
try:
with CreateKeyEx(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_ALL_ACCESS | KEY_WOW64_32KEY) as created_key:
# QueryReflectionKey returns whether or not the key is disabled
disabled = QueryReflectionKey(created_key)
self.assertEqual(type(disabled), bool)
# HKCU\Software\Classes is reflected by default
self.assertFalse(disabled)
DisableReflectionKey(created_key)
self.assertTrue(QueryReflectionKey(created_key))
# The key is now closed and would normally be reflected to the
# 64-bit area, but let's make sure that didn't happen.
open_fail = lambda: OpenKeyEx(HKEY_CURRENT_USER,
test_reflect_key_name, 0,
KEY_READ | KEY_WOW64_64KEY)
self.assertRaises(OSError, open_fail)
# Make sure the 32-bit key is actually there
with OpenKeyEx(HKEY_CURRENT_USER, test_reflect_key_name, 0,
KEY_READ | KEY_WOW64_32KEY) as key:
self.assertNotEqual(key.handle, 0)
finally:
DeleteKeyEx(HKEY_CURRENT_USER, test_reflect_key_name,
KEY_WOW64_32KEY, 0)
def test_exception_numbers(self):
with self.assertRaises(FileNotFoundError) as ctx:
QueryValue(HKEY_CLASSES_ROOT, 'some_value_that_does_not_exist')
def test_main():
support.run_unittest(LocalWinregTests, RemoteWinregTests,
Win64WinregTests)
if __name__ == "__main__":
if not REMOTE_NAME:
print("Remote registry calls can be tested using",
"'test_winreg.py --remote \\\\machine_name'")
test_main()
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