Lib/test/test_winreg.py

# Test the windows specific win32reg module.
# Only win32reg functions not hit here: FlushKey, LoadKey and SaveKey

from _winreg import *
import os, sys
import unittest

from test import test_support

test_key_name = "SOFTWARE\\Python Registry 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),
]

class WinregTests(unittest.TestCase):
    remote_name = None

    def WriteTestData(self, root_key):
        # Set the default value for this key.
        SetValue(root_key, test_key_name, REG_SZ, "Default value")
        key = CreateKey(root_key, test_key_name)
        # Create a sub-key
        sub_key = CreateKey(key, "sub_key")
        # 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 ReadTestData(self, root_key):
        # 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
        sub_key = OpenKey(key, "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, "sub_key", "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 DeleteTestData(self, root_key):
        key = OpenKey(root_key, test_key_name, 0, KEY_ALL_ACCESS)
        sub_key = OpenKey(key, "sub_key", 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, "sub_key")

        try:
            # Shouldnt be able to delete it twice!
            DeleteKey(key, "sub_key")
            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 TestAll(self, root_key):
        self.WriteTestData(root_key)
        self.ReadTestData(root_key)
        self.DeleteTestData(root_key)

    def testLocalMachineRegistryWorks(self):
        self.TestAll(HKEY_CURRENT_USER)

    def testConnectRegistryToLocalMachineWorks(self):
        # perform minimal ConnectRegistry test which just invokes it
        h = ConnectRegistry(None, HKEY_LOCAL_MACHINE)
        h.Close()

    def testRemoteMachineRegistryWorks(self):
        if not self.remote_name:
            raise test_support.TestSkipped("Remote machine name "
                                           "not specified.")
        remote_key = ConnectRegistry(self.remote_name, HKEY_CURRENT_USER)
        self.TestAll(remote_key)

def test_main():
    test_support.run_unittest(WinregTests)

if __name__ == "__main__":
    try:
        WinregTests.remote_name = sys.argv[sys.argv.index("--remote")+1]
    except (IndexError, ValueError):
        print("Remote registry calls can be tested using",
              "'test_winreg.py --remote \\\\machine_name'")
        WinregTests.remote_name = None
    test_main()