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cpython/Lib/test/test_winreg.py
Brian Curtin 60853211da Fix #2810 - handle the case where some registry calls return 
ERROR_MORE_DATA, requiring another call to get the remaining data.

Patch by Daniel Stutzbach
2010-05-26 17:43:50 +00:00

411 lines
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Python
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# -*- coding: utf-8 -*-
# Test the windows specific win32reg module.
# Only win32reg functions not hit here: FlushKey, LoadKey and SaveKey
import os, sys
import unittest
from test import support
threading = support.import_module("threading")
from platform import machine
# Do this first so test will be skipped if module doesn't exist
support.import_module('winreg')
# 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
test_key_name = "SOFTWARE\\Python Registry Test Key - Delete Me"
# On OS'es that support reflection we should test with a reflected key
test_reflect_key_name = "SOFTWARE\\Classes\\Python Test Key - Delete Me"
test_data = [
("Int Value", 45, REG_DWORD),
("String Val", "A string value", REG_SZ),
("StringExpand", "The path is %path%", REG_EXPAND_SZ),
("Multi-string", ["Lots", "of", "string", "values"], 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, KEY_ALL_ACCESS)
except WindowsError:
# subkey does not exist
return
while True:
try:
subsubkey = EnumKey(hkey, 0)
except WindowsError:
# 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.assertEquals(nkeys, 1, "Not the correct number of sub keys")
self.assertEquals(nvalues, 1, "Not the correct number of values")
nkeys, nvalues, since_mod = QueryInfoKey(sub_key)
self.assertEquals(nkeys, 0, "Not the correct number of sub keys")
self.assertEquals(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 EnvironmentError:
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 EnvironmentError:
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.assertEquals(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 EnvironmentError:
break
self.assertEquals(data in test_data, True,
"Didn't read back the correct test data")
index = index + 1
self.assertEquals(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.assertEquals(read_val, value_data,
"Could not directly read the value")
self.assertEquals(read_typ, value_type,
"Could not directly read the value")
sub_key.Close()
# Enumerate our main key.
read_val = EnumKey(key, 0)
self.assertEquals(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 EnvironmentError:
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.assertEquals(nkeys, 0, "subkey not empty before delete")
self.assertEquals(nvalues, 0, "subkey not empty before delete")
sub_key.Close()
DeleteKey(key, subkeystr)
try:
# Shouldnt be able to delete it twice!
DeleteKey(key, subkeystr)
self.fail("Deleting the key twice succeeded")
except EnvironmentError:
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 WindowsError: # 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)
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_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_inexistant_remote_registry(self):
connect = lambda: ConnectRegistry("abcdefghijkl", HKEY_CURRENT_USER)
self.assertRaises(WindowsError, 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 WindowsError
except WindowsError:
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 throw "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 threw "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
# throw "WindowsError: More data is available" in 2.6 and 3.1
EnumValue(HKEY_PERFORMANCE_DATA, 0)
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)
@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_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.assertEquals(None, EnableReflectionKey(key))
self.assertEquals(None, 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(WindowsError, 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(WindowsError, 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_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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