G01_0350/venv_win32/Lib/site-packages/win32/test/test_win32file.py

import unittest
from pywin32_testutil import str2bytes, TestSkipped, testmain
import win32api, win32file, win32pipe, pywintypes, winerror, win32event
import win32con, ntsecuritycon
import sys
import os
import tempfile
import threading
import time
import shutil
import socket
import datetime
import random
import win32timezone

try:
    set
except NameError:
    from sets import Set as set

class TestReadBuffer(unittest.TestCase):
    def testLen(self):
        buffer = win32file.AllocateReadBuffer(1)
        self.failUnlessEqual(len(buffer), 1)

    def testSimpleIndex(self):
        buffer = win32file.AllocateReadBuffer(1)
        buffer[0] = 0xFF
        self.assertEqual(buffer[0], 0xFF)

    def testSimpleSlice(self):
        buffer = win32file.AllocateReadBuffer(2)
        val = str2bytes('\0\0')
        buffer[:2] = val
        self.failUnlessEqual(buffer[0:2], val)

class TestSimpleOps(unittest.TestCase):
    def testSimpleFiles(self):
        fd, filename = tempfile.mkstemp()
        os.close(fd)
        os.unlink(filename)
        handle = win32file.CreateFile(filename, win32file.GENERIC_WRITE, 0, None, win32con.CREATE_NEW, 0, None)
        test_data = str2bytes("Hello\0there")
        try:
            win32file.WriteFile(handle, test_data)
            handle.Close()
            # Try and open for read
            handle = win32file.CreateFile(filename, win32file.GENERIC_READ, 0, None, win32con.OPEN_EXISTING, 0, None)
            rc, data = win32file.ReadFile(handle, 1024)
            self.assertEquals(data, test_data)
        finally:
            handle.Close()
            try:
                os.unlink(filename)
            except os.error:
                pass

    # A simple test using normal read/write operations.
    def testMoreFiles(self):
        # Create a file in the %TEMP% directory.
        testName = os.path.join( win32api.GetTempPath(), "win32filetest.dat" )
        desiredAccess = win32file.GENERIC_READ | win32file.GENERIC_WRITE
        # Set a flag to delete the file automatically when it is closed.
        fileFlags = win32file.FILE_FLAG_DELETE_ON_CLOSE
        h = win32file.CreateFile( testName, desiredAccess, win32file.FILE_SHARE_READ, None, win32file.CREATE_ALWAYS, fileFlags, 0)
    
        # Write a known number of bytes to the file.
        data = str2bytes("z") * 1025
    
        win32file.WriteFile(h, data)
    
        self.failUnless(win32file.GetFileSize(h) == len(data), "WARNING: Written file does not have the same size as the length of the data in it!")
    
        # Ensure we can read the data back.
        win32file.SetFilePointer(h, 0, win32file.FILE_BEGIN)
        hr, read_data = win32file.ReadFile(h, len(data)+10) # + 10 to get anything extra
        self.failUnless(hr==0, "Readfile returned %d" % hr)

        self.failUnless(read_data == data, "Read data is not what we wrote!")
    
        # Now truncate the file at 1/2 its existing size.
        newSize = len(data)//2
        win32file.SetFilePointer(h, newSize, win32file.FILE_BEGIN)
        win32file.SetEndOfFile(h)
        self.failUnlessEqual(win32file.GetFileSize(h), newSize)
    
        # GetFileAttributesEx/GetFileAttributesExW tests.
        self.failUnlessEqual(win32file.GetFileAttributesEx(testName), win32file.GetFileAttributesExW(testName))

        attr, ct, at, wt, size = win32file.GetFileAttributesEx(testName)
        self.failUnless(size==newSize, 
                        "Expected GetFileAttributesEx to return the same size as GetFileSize()")
        self.failUnless(attr==win32file.GetFileAttributes(testName), 
                        "Expected GetFileAttributesEx to return the same attributes as GetFileAttributes")

        h = None # Close the file by removing the last reference to the handle!

        self.failUnless(not os.path.isfile(testName), "After closing the file, it still exists!")

    def testFilePointer(self):
        # via [ 979270 ] SetFilePointer fails with negative offset

        # Create a file in the %TEMP% directory.
        filename = os.path.join( win32api.GetTempPath(), "win32filetest.dat" )

        f = win32file.CreateFile(filename,
                                win32file.GENERIC_READ|win32file.GENERIC_WRITE,
                                0,
                                None,
                                win32file.CREATE_ALWAYS,
                                win32file.FILE_ATTRIBUTE_NORMAL,
                                0)
        try:
            #Write some data
            data = str2bytes('Some data')
            (res, written) = win32file.WriteFile(f, data)
            
            self.failIf(res)
            self.assertEqual(written, len(data))
            
            #Move at the beginning and read the data
            win32file.SetFilePointer(f, 0, win32file.FILE_BEGIN)
            (res, s) = win32file.ReadFile(f, len(data))
            
            self.failIf(res)
            self.assertEqual(s, data)
            
            #Move at the end and read the data
            win32file.SetFilePointer(f, -len(data), win32file.FILE_END)
            (res, s) = win32file.ReadFile(f, len(data))
            
            self.failIf(res)
            self.failUnlessEqual(s, data)
        finally:
            f.Close()
            os.unlink(filename)

    def testFileTimesTimezones(self):
        filename = tempfile.mktemp("-testFileTimes")
        # now() is always returning a timestamp with microseconds but the
        # file APIs all have zero microseconds, so some comparisons fail.
        now_utc = win32timezone.utcnow().replace(microsecond=0)
        now_local = now_utc.astimezone(win32timezone.TimeZoneInfo.local())
        h = win32file.CreateFile(filename,
                                 win32file.GENERIC_READ|win32file.GENERIC_WRITE,
                                 0, None, win32file.CREATE_ALWAYS, 0, 0)
        try:
            win32file.SetFileTime(h, now_utc, now_utc, now_utc)
            ct, at, wt = win32file.GetFileTime(h)
            self.failUnlessEqual(now_local, ct)
            self.failUnlessEqual(now_local, at)
            self.failUnlessEqual(now_local, wt)
            # and the reverse - set local, check against utc
            win32file.SetFileTime(h, now_local, now_local, now_local)
            ct, at, wt = win32file.GetFileTime(h)
            self.failUnlessEqual(now_utc, ct)
            self.failUnlessEqual(now_utc, at)
            self.failUnlessEqual(now_utc, wt)
        finally:
            h.close()
            os.unlink(filename)

    def testFileTimes(self):
        from win32timezone import TimeZoneInfo
        # now() is always returning a timestamp with microseconds but the
        # file APIs all have zero microseconds, so some comparisons fail.
        now = datetime.datetime.now(tz=TimeZoneInfo.utc()).replace(microsecond=0)
        nowish = now + datetime.timedelta(seconds=1)
        later = now + datetime.timedelta(seconds=120)

        filename = tempfile.mktemp("-testFileTimes")
        # Windows docs the 'last time' isn't valid until the last write
        # handle is closed - so create the file, then re-open it to check.
        open(filename,"w").close()
        f = win32file.CreateFile(filename, win32file.GENERIC_READ|win32file.GENERIC_WRITE,
                                 0, None,
                                 win32con.OPEN_EXISTING, 0, None)
        try:
            ct, at, wt = win32file.GetFileTime(f)
            self.failUnless(ct >= now, "File was created in the past - now=%s, created=%s" % (now, ct))
            self.failUnless( now <= ct <= nowish, (now, ct))
            self.failUnless(wt >= now, "File was written-to in the past now=%s, written=%s" % (now,wt))
            self.failUnless( now <= wt <= nowish, (now, wt))

            # Now set the times.
            win32file.SetFileTime(f, later, later, later, UTCTimes=True)
            # Get them back.
            ct, at, wt = win32file.GetFileTime(f)
            # XXX - the builtin PyTime type appears to be out by a dst offset.
            # just ignore that type here...
            self.failUnlessEqual(ct, later)
            self.failUnlessEqual(at, later)
            self.failUnlessEqual(wt, later)

        finally:
            f.Close()
            os.unlink(filename)

class TestGetFileInfoByHandleEx(unittest.TestCase):
    __handle = __filename = None
    def setUp(self):
        fd, self.__filename = tempfile.mkstemp()
        os.close(fd)

    def tearDown(self):
        if self.__handle is not None:
            self.__handle.Close()
        if self.__filename is not None:
            try:
                os.unlink(self.__filename)
            except OSError:
                pass
        self.__handle = self.__filename = None

    def testFileBasicInfo(self):
        attr = win32file.GetFileAttributes(self.__filename)
        f = win32file.CreateFile(self.__filename, win32file.GENERIC_READ, 0, None,
                                 win32con.OPEN_EXISTING, 0, None)
        self.__handle = f
        ct, at, wt = win32file.GetFileTime(f)

        # bug #752: this throws ERROR_BAD_LENGTH (24) in x86 binaries of build 221
        basic_info = win32file.GetFileInformationByHandleEx(f, win32file.FileBasicInfo)

        self.assertEqual(ct, basic_info['CreationTime'])
        self.assertEqual(at, basic_info['LastAccessTime'])
        self.assertEqual(wt, basic_info['LastWriteTime'])
        self.assertEqual(attr, basic_info['FileAttributes'])

class TestOverlapped(unittest.TestCase):
    def testSimpleOverlapped(self):
        # Create a file in the %TEMP% directory.
        import win32event
        testName = os.path.join( win32api.GetTempPath(), "win32filetest.dat" )
        desiredAccess = win32file.GENERIC_WRITE
        overlapped = pywintypes.OVERLAPPED()
        evt = win32event.CreateEvent(None, 0, 0, None)
        overlapped.hEvent = evt
        # Create the file and write shit-loads of data to it.
        h = win32file.CreateFile( testName, desiredAccess, 0, None, win32file.CREATE_ALWAYS, 0, 0)
        chunk_data = str2bytes("z") * 0x8000
        num_loops = 512
        expected_size = num_loops * len(chunk_data)
        for i in range(num_loops):
            win32file.WriteFile(h, chunk_data, overlapped)
            win32event.WaitForSingleObject(overlapped.hEvent, win32event.INFINITE)
            overlapped.Offset = overlapped.Offset + len(chunk_data)
        h.Close()
        # Now read the data back overlapped
        overlapped = pywintypes.OVERLAPPED()
        evt = win32event.CreateEvent(None, 0, 0, None)
        overlapped.hEvent = evt
        desiredAccess = win32file.GENERIC_READ
        h = win32file.CreateFile( testName, desiredAccess, 0, None, win32file.OPEN_EXISTING, 0, 0)
        buffer = win32file.AllocateReadBuffer(0xFFFF)
        while 1:
            try:
                hr, data = win32file.ReadFile(h, buffer, overlapped)
                win32event.WaitForSingleObject(overlapped.hEvent, win32event.INFINITE)
                overlapped.Offset = overlapped.Offset + len(data)
                if not data is buffer:
                    self.fail("Unexpected result from ReadFile - should be the same buffer we passed it")
            except win32api.error:
                break
        h.Close()

    def testCompletionPortsMultiple(self):
        # Mainly checking that we can "associate" an existing handle.  This
        # failed in build 203.
        ioport = win32file.CreateIoCompletionPort(win32file.INVALID_HANDLE_VALUE,
                                                  0, 0, 0)
        socks = []
        for PORT in range(9123, 9125):
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
            sock.bind(('', PORT))
            sock.listen(1)
            socks.append(sock)
            new = win32file.CreateIoCompletionPort(sock.fileno(), ioport, PORT, 0)
            assert new is ioport
        for s in socks:
            s.close()
        hv = int(ioport)
        ioport = new = None
        # The handle itself should be closed now (unless we leak references!)
        # Check that.
        try:
            win32file.CloseHandle(hv)
            raise RuntimeError("Expected close to fail!")
        except win32file.error as details:
            self.failUnlessEqual(details.winerror, winerror.ERROR_INVALID_HANDLE)

    def testCompletionPortsQueued(self):
        class Foo: pass
        io_req_port = win32file.CreateIoCompletionPort(-1, None, 0, 0)
        overlapped = pywintypes.OVERLAPPED()
        overlapped.object = Foo()
        win32file.PostQueuedCompletionStatus(io_req_port, 0, 99, overlapped)
        errCode, bytes, key, overlapped = \
                win32file.GetQueuedCompletionStatus(io_req_port, win32event.INFINITE)
        self.failUnlessEqual(errCode, 0)
        self.failUnless(isinstance(overlapped.object, Foo))

    def _IOCPServerThread(self, handle, port, drop_overlapped_reference):
        overlapped = pywintypes.OVERLAPPED()
        win32pipe.ConnectNamedPipe(handle, overlapped)
        if drop_overlapped_reference:
            # Be naughty - the overlapped object is now dead, but
            # GetQueuedCompletionStatus will still find it.  Our check of
            # reference counting should catch that error.
            overlapped = None
            # even if we fail, be sure to close the handle; prevents hangs
            # on Vista 64...
            try:
                self.failUnlessRaises(RuntimeError,
                                      win32file.GetQueuedCompletionStatus, port, -1)
            finally:
                handle.Close()
            return

        result = win32file.GetQueuedCompletionStatus(port, -1)
        ol2 = result[-1]
        self.failUnless(ol2 is overlapped)
        data = win32file.ReadFile(handle, 512)[1]
        win32file.WriteFile(handle, data)

    def testCompletionPortsNonQueued(self, test_overlapped_death = 0):
        # In 204 we had a reference count bug when OVERLAPPED objects were
        # associated with a completion port other than via
        # PostQueuedCompletionStatus.  This test is based on the reproduction
        # reported with that bug.
        # Create the pipe.
        BUFSIZE = 512
        pipe_name = r"\\.\pipe\pywin32_test_pipe"
        handle = win32pipe.CreateNamedPipe(pipe_name,
                          win32pipe.PIPE_ACCESS_DUPLEX|
                          win32file.FILE_FLAG_OVERLAPPED,
                          win32pipe.PIPE_TYPE_MESSAGE|
                          win32pipe.PIPE_READMODE_MESSAGE|
                          win32pipe.PIPE_WAIT,
                          1, BUFSIZE, BUFSIZE,
                          win32pipe.NMPWAIT_WAIT_FOREVER,
                          None)
        # Create an IOCP and associate it with the handle.        
        port = win32file.CreateIoCompletionPort(-1, 0, 0, 0)
        win32file.CreateIoCompletionPort(handle, port, 1, 0)

        t = threading.Thread(target=self._IOCPServerThread, args=(handle,port, test_overlapped_death))
        t.setDaemon(True) # avoid hanging entire test suite on failure.
        t.start()
        try:
            time.sleep(0.1) # let thread do its thing.
            try:
                win32pipe.CallNamedPipe(r"\\.\pipe\pywin32_test_pipe", str2bytes("Hello there"), BUFSIZE, 0)
            except win32pipe.error:
                # Testing for overlapped death causes this
                if not test_overlapped_death:
                    raise
        finally:
            if not test_overlapped_death:
                handle.Close()
            t.join(3)
            self.failIf(t.is_alive(), "thread didn't finish")

    def testCompletionPortsNonQueuedBadReference(self):
        self.testCompletionPortsNonQueued(True)

    def testHashable(self):
        overlapped = pywintypes.OVERLAPPED()
        d = {}
        d[overlapped] = "hello"
        self.failUnlessEqual(d[overlapped], "hello")

    def testComparable(self):
        overlapped = pywintypes.OVERLAPPED()
        self.failUnlessEqual(overlapped, overlapped)
        # ensure we explicitly test the operators.
        self.failUnless(overlapped == overlapped)
        self.failIf(overlapped != overlapped)

    def testComparable2(self):
        # 2 overlapped objects compare equal if their contents are the same.
        overlapped1 = pywintypes.OVERLAPPED()
        overlapped2 = pywintypes.OVERLAPPED()
        self.failUnlessEqual(overlapped1, overlapped2)
        # ensure we explicitly test the operators.
        self.failUnless(overlapped1 == overlapped2)
        self.failIf(overlapped1 != overlapped2)
        # now change something in one of them - should no longer be equal.
        overlapped1.hEvent = 1
        self.failIfEqual(overlapped1, overlapped2)
        # ensure we explicitly test the operators.
        self.failIf(overlapped1 == overlapped2)
        self.failUnless(overlapped1 != overlapped2)

class TestSocketExtensions(unittest.TestCase):
    def acceptWorker(self, port, running_event, stopped_event):
        listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        listener.bind(('', port))
        listener.listen(200)

        # create accept socket
        accepter = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        # An overlapped
        overlapped = pywintypes.OVERLAPPED()
        overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
        # accept the connection.
        # We used to allow strings etc to be passed here, and they would be
        # modified!  Obviously this is evil :)
        buffer = " " * 1024 # EVIL - SHOULD NOT BE ALLOWED.
        self.assertRaises(TypeError, win32file.AcceptEx, listener, accepter, buffer, overlapped)

        # This is the correct way to allocate the buffer...
        buffer = win32file.AllocateReadBuffer(1024)
        rc = win32file.AcceptEx(listener, accepter, buffer, overlapped)
        self.failUnlessEqual(rc, winerror.ERROR_IO_PENDING)
        # Set the event to say we are all ready
        running_event.set()
        # and wait for the connection.
        rc = win32event.WaitForSingleObject(overlapped.hEvent, 2000)
        if rc == win32event.WAIT_TIMEOUT:
            self.fail("timed out waiting for a connection")
        nbytes = win32file.GetOverlappedResult(listener.fileno(), overlapped, False)
        #fam, loc, rem = win32file.GetAcceptExSockaddrs(accepter, buffer)
        accepter.send(buffer[:nbytes])
        # NOT set in a finally - this means *successfully* stopped!
        stopped_event.set()

    def testAcceptEx(self):
        port = 4680
        running = threading.Event()
        stopped = threading.Event()
        t = threading.Thread(target=self.acceptWorker, args=(port, running,stopped))
        t.start()
        running.wait(2)
        if not running.isSet():
            self.fail("AcceptEx Worker thread failed to start")
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect(('127.0.0.1', port))
        win32file.WSASend(s, str2bytes("hello"), None)
        overlapped = pywintypes.OVERLAPPED()
        overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
        # Like above - WSARecv used to allow strings as the receive buffer!!
        buffer = " " * 10
        self.assertRaises(TypeError, win32file.WSARecv, s, buffer, overlapped)
        # This one should work :)
        buffer = win32file.AllocateReadBuffer(10)
        win32file.WSARecv(s, buffer, overlapped)
        nbytes = win32file.GetOverlappedResult(s.fileno(), overlapped, True)
        got = buffer[:nbytes]
        self.failUnlessEqual(got, str2bytes("hello"))
        # thread should have stopped
        stopped.wait(2)
        if not stopped.isSet():
            self.fail("AcceptEx Worker thread failed to successfully stop")

class TestFindFiles(unittest.TestCase):
    def testIter(self):
        dir = os.path.join(os.getcwd(), "*")
        files = win32file.FindFilesW(dir)
        set1 = set()
        set1.update(files)
        set2 = set()
        for file in win32file.FindFilesIterator(dir):
            set2.add(file)
        assert len(set2) > 5, "This directory has less than 5 files!?"
        self.failUnlessEqual(set1, set2)

    def testBadDir(self):
        dir = os.path.join(os.getcwd(), "a dir that doesnt exist", "*")
        self.assertRaises(win32file.error, win32file.FindFilesIterator, dir)

    def testEmptySpec(self):
        spec = os.path.join(os.getcwd(), "*.foo_bar")
        num = 0
        for i in win32file.FindFilesIterator(spec):
            num += 1
        self.failUnlessEqual(0, num)

    def testEmptyDir(self):
        test_path = os.path.join(win32api.GetTempPath(), "win32file_test_directory")
        try:
            # Note: previously used shutil.rmtree, but when looking for
            # reference count leaks, that function showed leaks!  os.rmdir
            # doesn't have that problem.
            os.rmdir(test_path)
        except os.error:
            pass
        os.mkdir(test_path)
        try:
            num = 0
            for i in win32file.FindFilesIterator(os.path.join(test_path, "*")):
                num += 1
            # Expecting "." and ".." only
            self.failUnlessEqual(2, num)
        finally:
            os.rmdir(test_path)

class TestDirectoryChanges(unittest.TestCase):
    num_test_dirs = 1
    def setUp(self):
        self.watcher_threads = []
        self.watcher_thread_changes = []
        self.dir_names = []
        self.dir_handles = []
        for i in range(self.num_test_dirs):
            td = tempfile.mktemp("-test-directory-changes-%d" % i)
            os.mkdir(td)
            self.dir_names.append(td)
            hdir = win32file.CreateFile(td, 
                                        ntsecuritycon.FILE_LIST_DIRECTORY,
                                        win32con.FILE_SHARE_READ,
                                        None, # security desc
                                        win32con.OPEN_EXISTING,
                                        win32con.FILE_FLAG_BACKUP_SEMANTICS |
                                        win32con.FILE_FLAG_OVERLAPPED,
                                        None)
            self.dir_handles.append(hdir)

            changes = []
            t = threading.Thread(target=self._watcherThreadOverlapped,
                                 args=(td, hdir, changes))
            t.start()
            self.watcher_threads.append(t)
            self.watcher_thread_changes.append(changes)

    def _watcherThread(self, dn, dh, changes):
        # A synchronous version:
        # XXX - not used - I was having a whole lot of problems trying to
        # get this to work.  Specifically:
        # * ReadDirectoryChangesW without an OVERLAPPED blocks infinitely.
        # * If another thread attempts to close the handle while
        #   ReadDirectoryChangesW is waiting on it, the ::CloseHandle() method
        #   blocks (which has nothing to do with the GIL - it is correctly
        #   managed)
        # Which ends up with no way to kill the thread!
        flags = win32con.FILE_NOTIFY_CHANGE_FILE_NAME
        while 1:
            try:
                print("waiting", dh)
                changes = win32file.ReadDirectoryChangesW(dh,
                                                          8192,
                                                          False, #sub-tree
                                                          flags)
                print("got", changes)
            except:
                raise
            changes.extend(changes)

    def _watcherThreadOverlapped(self, dn, dh, changes):
        flags = win32con.FILE_NOTIFY_CHANGE_FILE_NAME
        buf = win32file.AllocateReadBuffer(8192)
        overlapped = pywintypes.OVERLAPPED()
        overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
        while 1:
            win32file.ReadDirectoryChangesW(dh,
                                            buf,
                                            False, #sub-tree
                                            flags,
                                            overlapped)
            # Wait for our event, or for 5 seconds.
            rc = win32event.WaitForSingleObject(overlapped.hEvent, 5000)
            if rc == win32event.WAIT_OBJECT_0:
                # got some data!  Must use GetOverlappedResult to find out
                # how much is valid!  0 generally means the handle has
                # been closed.  Blocking is OK here, as the event has
                # already been set.
                nbytes = win32file.GetOverlappedResult(dh, overlapped, True)
                if nbytes:
                    bits = win32file.FILE_NOTIFY_INFORMATION(buf, nbytes)
                    changes.extend(bits)
                else:
                    # This is "normal" exit - our 'tearDown' closes the
                    # handle.
                    # print "looks like dir handle was closed!"
                    return
            else:
                print("ERROR: Watcher thread timed-out!")
                return # kill the thread!

    def tearDown(self):
        # be careful about raising errors at teardown!
        for h in self.dir_handles:
            # See comments in _watcherThread above - this appears to
            # deadlock if a synchronous ReadDirectoryChangesW is waiting...
            # (No such problems with an asynch ReadDirectoryChangesW)
            h.Close()
        for dn in self.dir_names:
            try:
                shutil.rmtree(dn)
            except OSError:
                print("FAILED to remove directory", dn)

        for t in self.watcher_threads:
            # closing dir handle should have killed threads!
            t.join(5)
            if t.is_alive():
                print("FAILED to wait for thread termination")

    def stablize(self):
        time.sleep(0.5)

    def testSimple(self):
        self.stablize()
        for dn in self.dir_names:
            fn = os.path.join(dn, "test_file")
            open(fn, "w").close()

        self.stablize()
        changes = self.watcher_thread_changes[0]
        self.failUnlessEqual(changes, [(1, "test_file")])

    def testSmall(self):
        self.stablize()
        for dn in self.dir_names:
            fn = os.path.join(dn, "x")
            open(fn, "w").close()

        self.stablize()
        changes = self.watcher_thread_changes[0]
        self.failUnlessEqual(changes, [(1, "x")])

class TestEncrypt(unittest.TestCase):
    def testEncrypt(self):
        fname = tempfile.mktemp("win32file_test")
        f = open(fname, "wb")
        f.write(str2bytes("hello"))
        f.close()
        f = None
        try:
            try:
                win32file.EncryptFile(fname)
            except win32file.error as details:
                if details.winerror != winerror.ERROR_ACCESS_DENIED:
                    raise
                print("It appears this is not NTFS - cant encrypt/decrypt")
            win32file.DecryptFile(fname)
        finally:
            if f is not None:
                f.close()
            os.unlink(fname)

class TestConnect(unittest.TestCase):
    def connect_thread_runner(self, expect_payload, giveup_event):
        # As Windows 2000 doesn't do ConnectEx, we need to use a non-blocking
        # accept, as our test connection may never come.  May as well use
        # AcceptEx for this...
        listener = socket.socket()
        self.addr = ('localhost', random.randint(10000,64000))
        listener.bind(self.addr)
        listener.listen(1)

        # create accept socket
        accepter = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        # An overlapped
        overlapped = pywintypes.OVERLAPPED()
        overlapped.hEvent = win32event.CreateEvent(None, 0, 0, None)
        # accept the connection.
        if expect_payload:
            buf_size = 1024
        else:
            # when we don't expect data we must be careful to only pass the
            # exact number of bytes for the endpoint data...
            buf_size = win32file.CalculateSocketEndPointSize(listener)

        buffer = win32file.AllocateReadBuffer(buf_size)
        win32file.AcceptEx(listener, accepter, buffer, overlapped)
        # wait for the connection or our test to fail.
        events = giveup_event, overlapped.hEvent
        rc = win32event.WaitForMultipleObjects(events, False, 2000)
        if rc == win32event.WAIT_TIMEOUT:
            self.fail("timed out waiting for a connection")
        if rc == win32event.WAIT_OBJECT_0:
            # Our main thread running the test failed and will never connect.
            return
        # must be a connection.
        nbytes = win32file.GetOverlappedResult(listener.fileno(), overlapped, False)
        if expect_payload:
            self.request = buffer[:nbytes]
        accepter.send(str2bytes('some expected response'))

    def test_connect_with_payload(self):
        giveup_event = win32event.CreateEvent(None, 0, 0, None)
        t = threading.Thread(target=self.connect_thread_runner,
                             args=(True, giveup_event))
        t.start()
        time.sleep(0.1)
        s2 = socket.socket()
        ol = pywintypes.OVERLAPPED()
        s2.bind(('0.0.0.0', 0)) # connectex requires the socket be bound beforehand
        try:
            win32file.ConnectEx(s2, self.addr, ol, str2bytes("some expected request"))
        except win32file.error as exc:
            win32event.SetEvent(giveup_event)
            if exc.winerror == 10022: # WSAEINVAL
                raise TestSkipped("ConnectEx is not available on this platform")
            raise # some error error we don't expect.
        # We occasionally see ERROR_CONNECTION_REFUSED in automation
        try:
            win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        except win32file.error as exc:
            win32event.SetEvent(giveup_event)
            if exc.winerror == winerror.ERROR_CONNECTION_REFUSED:
                raise TestSkipped("Assuming ERROR_CONNECTION_REFUSED is transient")
            raise
        ol = pywintypes.OVERLAPPED()
        buff = win32file.AllocateReadBuffer(1024)
        win32file.WSARecv(s2, buff, ol, 0)
        length = win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        self.response = buff[:length]
        self.assertEqual(self.response, str2bytes('some expected response'))
        self.assertEqual(self.request, str2bytes('some expected request'))
        t.join(5)
        self.failIf(t.is_alive(), "worker thread didn't terminate")

    def test_connect_without_payload(self):
        giveup_event = win32event.CreateEvent(None, 0, 0, None)
        t = threading.Thread(target=self.connect_thread_runner,
                             args=(False, giveup_event))
        t.start()
        time.sleep(0.1)
        s2 = socket.socket()
        ol = pywintypes.OVERLAPPED()
        s2.bind(('0.0.0.0', 0)) # connectex requires the socket be bound beforehand
        try:
            win32file.ConnectEx(s2, self.addr, ol)
        except win32file.error as exc:
            win32event.SetEvent(giveup_event)
            if exc.winerror == 10022: # WSAEINVAL
                raise TestSkipped("ConnectEx is not available on this platform")
            raise # some error error we don't expect.
        # We occasionally see ERROR_CONNECTION_REFUSED in automation
        try:
            win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        except win32file.error as exc:
            win32event.SetEvent(giveup_event)
            if exc.winerror == winerror.ERROR_CONNECTION_REFUSED:
                raise TestSkipped("Assuming ERROR_CONNECTION_REFUSED is transient")
            raise

        ol = pywintypes.OVERLAPPED()
        buff = win32file.AllocateReadBuffer(1024)
        win32file.WSARecv(s2, buff, ol, 0)
        length = win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        self.response = buff[:length]
        self.assertEqual(self.response, str2bytes('some expected response'))
        t.join(5)
        self.failIf(t.is_alive(), "worker thread didn't terminate")

class TestTransmit(unittest.TestCase):
    def test_transmit(self):
        import binascii
        bytes = os.urandom(1024*1024)
        val = binascii.hexlify(bytes)
        val_length = len(val)
        f = tempfile.TemporaryFile()
        f.write(val)

        def runner():
            s1 = socket.socket()
            # binding fails occasionally on github CI with:
            # OSError: [WinError 10013] An attempt was made to access a socket in a way forbidden by its access permissions
            # which probably just means the random port is already in use, so
            # let that happen a few times.
            for i in range(5):
                self.addr = ('localhost', random.randint(10000,64000))
                try:
                    s1.bind(self.addr)
                    break
                except os.error as exc:
                    if exc.winerror != 10013:
                        raise
                    print("Failed to use port", self.addr, "trying another random one")
            else:
                raise RuntimeError("Failed to find an available port to bind to.")
            s1.listen(1)
            cli, addr = s1.accept()
            buf = 1
            self.request = []
            while buf:
                buf = cli.recv(1024*100)
                self.request.append(buf)

        th = threading.Thread(target=runner)
        th.start()
        time.sleep(0.5)
        s2 = socket.socket()
        s2.connect(self.addr)
        
        length = 0
        aaa = str2bytes("[AAA]")
        bbb = str2bytes("[BBB]")
        ccc = str2bytes("[CCC]")
        ddd = str2bytes("[DDD]")
        empty = str2bytes("")
        ol = pywintypes.OVERLAPPED()
        f.seek(0)
        win32file.TransmitFile(s2, win32file._get_osfhandle(f.fileno()), val_length, 0, ol, 0)
        length += win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        
        ol = pywintypes.OVERLAPPED()
        f.seek(0)
        win32file.TransmitFile(s2, win32file._get_osfhandle(f.fileno()), val_length, 0, ol, 0, aaa, bbb)
        length += win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        
        ol = pywintypes.OVERLAPPED()
        f.seek(0)
        win32file.TransmitFile(s2, win32file._get_osfhandle(f.fileno()), val_length, 0, ol, 0, empty, empty)
        length += win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        
        ol = pywintypes.OVERLAPPED()
        f.seek(0)
        win32file.TransmitFile(s2, win32file._get_osfhandle(f.fileno()), val_length, 0, ol, 0, None, ccc)
        length += win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        
        ol = pywintypes.OVERLAPPED()
        f.seek(0)
        win32file.TransmitFile(s2, win32file._get_osfhandle(f.fileno()), val_length, 0, ol, 0, ddd)
        length += win32file.GetOverlappedResult(s2.fileno(), ol, 1)
        
        s2.close()
        th.join()
        buf = str2bytes('').join(self.request)
        self.assertEqual(length, len(buf))
        expected = val + aaa + val + bbb + val + val + ccc + ddd + val
        self.assertEqual(type(expected), type(buf))
        self.assert_(expected == buf)


class TestWSAEnumNetworkEvents(unittest.TestCase):

    def test_basics(self):
        s = socket.socket()
        e = win32event.CreateEvent(None, 1, 0, None)
        win32file.WSAEventSelect(s, e, 0)
        self.assertEquals(win32file.WSAEnumNetworkEvents(s), {})
        self.assertEquals(win32file.WSAEnumNetworkEvents(s, e), {})
        self.assertRaises(TypeError, win32file.WSAEnumNetworkEvents, s, e, 3)
        self.assertRaises(TypeError, win32file.WSAEnumNetworkEvents, s, "spam")
        self.assertRaises(TypeError, win32file.WSAEnumNetworkEvents, "spam", e)
        self.assertRaises(TypeError, win32file.WSAEnumNetworkEvents, "spam")
        f = open("NUL")
        h = win32file._get_osfhandle(f.fileno())
        self.assertRaises(win32file.error, win32file.WSAEnumNetworkEvents, h)
        self.assertRaises(win32file.error, win32file.WSAEnumNetworkEvents, s, h)
        try:
            win32file.WSAEnumNetworkEvents(h)
        except win32file.error as e:
            self.assertEquals(e.winerror, win32file.WSAENOTSOCK)
        try:
            win32file.WSAEnumNetworkEvents(s, h)
        except win32file.error as e:
            # According to the docs it would seem reasonable that
            # this would fail with WSAEINVAL, but it doesn't.
            self.assertEquals(e.winerror, win32file.WSAENOTSOCK)

    def test_functional(self):
        # This is not really a unit test, but it does exercise the code
        # quite well and can serve as an example of WSAEventSelect and
        # WSAEnumNetworkEvents usage.
        port = socket.socket()
        port.setblocking(0)
        port_event = win32event.CreateEvent(None, 0, 0, None)
        win32file.WSAEventSelect(port, port_event,
                                 win32file.FD_ACCEPT |
                                 win32file.FD_CLOSE)
        port.bind(("127.0.0.1", 0))
        port.listen(10)

        client = socket.socket()
        client.setblocking(0)
        client_event = win32event.CreateEvent(None, 0, 0, None)
        win32file.WSAEventSelect(client, client_event,
                                 win32file.FD_CONNECT |
                                 win32file.FD_READ |
                                 win32file.FD_WRITE |
                                 win32file.FD_CLOSE)
        err = client.connect_ex(port.getsockname())
        self.assertEquals(err, win32file.WSAEWOULDBLOCK)

        res = win32event.WaitForSingleObject(port_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(port, port_event)
        self.assertEquals(events, {win32file.FD_ACCEPT: 0})

        server, addr = port.accept()
        server.setblocking(0)
        server_event = win32event.CreateEvent(None, 1, 0, None)
        win32file.WSAEventSelect(server, server_event,
                                 win32file.FD_READ |
                                 win32file.FD_WRITE |
                                 win32file.FD_CLOSE)
        res = win32event.WaitForSingleObject(server_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(server, server_event)
        self.assertEquals(events, {win32file.FD_WRITE: 0})

        res = win32event.WaitForSingleObject(client_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(client, client_event)
        self.assertEquals(events, {win32file.FD_CONNECT: 0,
                                   win32file.FD_WRITE: 0})
        sent = 0
        data = str2bytes("x") * 16 * 1024
        while sent < 16 * 1024 * 1024:
            try:
                sent += client.send(data)
            except socket.error as e:
                if e.args[0] == win32file.WSAEINTR:
                    continue
                elif e.args[0] in (win32file.WSAEWOULDBLOCK, win32file.WSAENOBUFS):
                    break
                else:
                    raise
        else:
            self.fail("could not find socket buffer limit")

        events = win32file.WSAEnumNetworkEvents(client)
        self.assertEquals(events, {})

        res = win32event.WaitForSingleObject(server_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(server, server_event)
        self.assertEquals(events, {win32file.FD_READ: 0})

        received = 0
        while received < sent:
            try:
                received += len(server.recv(16 * 1024))
            except socket.error as e:
                if e.args[0] in [win32file.WSAEINTR, win32file.WSAEWOULDBLOCK]:
                    continue
                else:
                    raise

        self.assertEquals(received, sent)
        events = win32file.WSAEnumNetworkEvents(server)
        self.assertEquals(events, {})

        res = win32event.WaitForSingleObject(client_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(client, client_event)
        self.assertEquals(events, {win32file.FD_WRITE: 0})

        client.shutdown(socket.SHUT_WR)
        res = win32event.WaitForSingleObject(server_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        # strange timing issues...
        for i in range(5):
            events = win32file.WSAEnumNetworkEvents(server, server_event)
            if events: break
            win32api.Sleep(100)
        else:
            raise AssertionError("failed to get events")
        self.assertEquals(events, {win32file.FD_CLOSE: 0})
        events = win32file.WSAEnumNetworkEvents(client)
        self.assertEquals(events, {})

        server.close()
        res = win32event.WaitForSingleObject(client_event, 1000)
        self.assertEquals(res, win32event.WAIT_OBJECT_0)
        events = win32file.WSAEnumNetworkEvents(client, client_event)
        self.assertEquals(events, {win32file.FD_CLOSE: 0})

        client.close()
        events = win32file.WSAEnumNetworkEvents(port)
        self.assertEquals(events, {})


if __name__ == '__main__':
    testmain()