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__init__.py	475 B	-rw-r--r--
cert.pem.no_trailing_newline	1.38 KB	-rw-r--r--
crash_test_dummy.py	549 B	-rw-r--r--
ignore_test_failure.py	30.72 KB	-rw-r--r--
iosim.py	17.74 KB	-rw-r--r--
key.pem.no_trailing_newline	1.67 KB	-rw-r--r--
mock_win32process.py	1.27 KB	-rw-r--r--
myrebuilder1.py	151 B	-rw-r--r--
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plugin_basic.py	901 B	-rw-r--r--
plugin_extra1.py	392 B	-rw-r--r--
plugin_extra2.py	550 B	-rw-r--r--
process_cmdline.py	123 B	-rw-r--r--
process_echoer.py	214 B	-rw-r--r--
process_fds.py	984 B	-rw-r--r--
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process_twisted.py	1.15 KB	-rw-r--r--
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server.pem	4.34 KB	-rw-r--r--
ssl_helpers.py	1.61 KB	-rw-r--r--
stdio_test_consumer.py	1.14 KB	-rw-r--r--
stdio_test_halfclose.py	2 KB	-rw-r--r--
stdio_test_hostpeer.py	1.06 KB	-rw-r--r--
stdio_test_lastwrite.py	1.13 KB	-rw-r--r--
stdio_test_loseconn.py	1.55 KB	-rw-r--r--
stdio_test_producer.py	1.45 KB	-rw-r--r--
stdio_test_write.py	902 B	-rw-r--r--
stdio_test_writeseq.py	894 B	-rw-r--r--
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test_amp.py	107.92 KB	-rw-r--r--
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test_factories.py	4.46 KB	-rw-r--r--
test_fdesc.py	7.28 KB	-rw-r--r--
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test_ftp.py	126.96 KB	-rw-r--r--
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test_internet.py	45.38 KB	-rw-r--r--
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test_lockfile.py	14.98 KB	-rw-r--r--
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test_policies.py	32.29 KB	-rw-r--r--
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test_process.py	85.16 KB	-rw-r--r--
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test_randbytes.py	3.19 KB	-rw-r--r--
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testutils.py	5.06 KB	-rw-r--r--

Code Editor : test_fdesc.py

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Tests for L{twisted.internet.fdesc}.
"""

import errno
import os
import sys

try:
    import fcntl
except ImportError:
    skip = "not supported on this platform"
else:
    from twisted.internet import fdesc

from twisted.python.util import untilConcludes
from twisted.trial import unittest

class NonBlockingTests(unittest.SynchronousTestCase):
    """
    Tests for L{fdesc.setNonBlocking} and L{fdesc.setBlocking}.
    """

def test_setNonBlocking(self):
        """
        L{fdesc.setNonBlocking} sets a file description to non-blocking.
        """
        r, w = os.pipe()
        self.addCleanup(os.close, r)
        self.addCleanup(os.close, w)
        self.assertFalse(fcntl.fcntl(r, fcntl.F_GETFL) & os.O_NONBLOCK)
        fdesc.setNonBlocking(r)
        self.assertTrue(fcntl.fcntl(r, fcntl.F_GETFL) & os.O_NONBLOCK)

def test_setBlocking(self):
        """
        L{fdesc.setBlocking} sets a file description to blocking.
        """
        r, w = os.pipe()
        self.addCleanup(os.close, r)
        self.addCleanup(os.close, w)
        fdesc.setNonBlocking(r)
        fdesc.setBlocking(r)
        self.assertFalse(fcntl.fcntl(r, fcntl.F_GETFL) & os.O_NONBLOCK)

class ReadWriteTests(unittest.SynchronousTestCase):
    """
    Tests for L{fdesc.readFromFD}, L{fdesc.writeToFD}.
    """

def setUp(self):
        """
        Create a non-blocking pipe that can be used in tests.
        """
        self.r, self.w = os.pipe()
        fdesc.setNonBlocking(self.r)
        fdesc.setNonBlocking(self.w)

def tearDown(self):
        """
        Close pipes.
        """
        try:
            os.close(self.w)
        except OSError:
            pass
        try:
            os.close(self.r)
        except OSError:
            pass

def write(self, d):
        """
        Write data to the pipe.
        """
        return fdesc.writeToFD(self.w, d)

def read(self):
        """
        Read data from the pipe.
        """
        l = []
        res = fdesc.readFromFD(self.r, l.append)
        if res is None:
            if l:
                return l[0]
            else:
                return b""
        else:
            return res

def test_writeAndRead(self):
        """
        Test that the number of bytes L{fdesc.writeToFD} reports as written
        with its return value are seen by L{fdesc.readFromFD}.
        """
        n = self.write(b"hello")
        self.assertTrue(n > 0)
        s = self.read()
        self.assertEqual(len(s), n)
        self.assertEqual(b"hello"[:n], s)

def test_writeAndReadLarge(self):
        """
        Similar to L{test_writeAndRead}, but use a much larger string to verify
        the behavior for that case.
        """
        orig = b"0123456879" * 10000
        written = self.write(orig)
        self.assertTrue(written > 0)
        result = []
        resultlength = 0
        i = 0
        while resultlength < written or i < 50:
            result.append(self.read())
            resultlength += len(result[-1])
            # Increment a counter to be sure we'll exit at some point
            i += 1
        result = b"".join(result)
        self.assertEqual(len(result), written)
        self.assertEqual(orig[:written], result)

def test_readFromEmpty(self):
        """
        Verify that reading from a file descriptor with no data does not raise
        an exception and does not result in the callback function being called.
        """
        l = []
        result = fdesc.readFromFD(self.r, l.append)
        self.assertEqual(l, [])
        self.assertIsNone(result)

def test_readFromCleanClose(self):
        """
        Test that using L{fdesc.readFromFD} on a cleanly closed file descriptor
        returns a connection done indicator.
        """
        os.close(self.w)
        self.assertEqual(self.read(), fdesc.CONNECTION_DONE)

def test_writeToClosed(self):
        """
        Verify that writing with L{fdesc.writeToFD} when the read end is closed
        results in a connection lost indicator.
        """
        os.close(self.r)
        self.assertEqual(self.write(b"s"), fdesc.CONNECTION_LOST)

def test_readFromInvalid(self):
        """
        Verify that reading with L{fdesc.readFromFD} when the read end is
        closed results in a connection lost indicator.
        """
        os.close(self.r)
        self.assertEqual(self.read(), fdesc.CONNECTION_LOST)

def test_writeToInvalid(self):
        """
        Verify that writing with L{fdesc.writeToFD} when the write end is
        closed results in a connection lost indicator.
        """
        os.close(self.w)
        self.assertEqual(self.write(b"s"), fdesc.CONNECTION_LOST)

def test_writeErrors(self):
        """
        Test error path for L{fdesc.writeTod}.
        """
        oldOsWrite = os.write

def eagainWrite(fd, data):
            err = OSError()
            err.errno = errno.EAGAIN
            raise err

os.write = eagainWrite
        try:
            self.assertEqual(self.write(b"s"), 0)
        finally:
            os.write = oldOsWrite

def eintrWrite(fd, data):
            err = OSError()
            err.errno = errno.EINTR
            raise err

os.write = eintrWrite
        try:
            self.assertEqual(self.write(b"s"), 0)
        finally:
            os.write = oldOsWrite

class CloseOnExecTests(unittest.SynchronousTestCase):
    """
    Tests for L{fdesc._setCloseOnExec} and L{fdesc._unsetCloseOnExec}.
    """

program = """
import os, errno
try:
    os.write(%d, b'lul')
except OSError as e:
    if e.errno == errno.EBADF:
        os._exit(0)
    os._exit(5)
except BaseException:
    os._exit(10)
else:
    os._exit(20)
"""

def _execWithFileDescriptor(self, fObj):
        pid = os.fork()
        if pid == 0:
            try:
                os.execv(
                    sys.executable,
                    [sys.executable, "-c", self.program % (fObj.fileno(),)],
                )
            except BaseException:
                import traceback

traceback.print_exc()
                os._exit(30)
        else:
            # On Linux wait(2) doesn't seem ever able to fail with EINTR but
            # POSIX seems to allow it and on macOS it happens quite a lot.
            return untilConcludes(os.waitpid, pid, 0)[1]

def test_setCloseOnExec(self):
        """
        A file descriptor passed to L{fdesc._setCloseOnExec} is not inherited
        by a new process image created with one of the exec family of
        functions.
        """
        with open(self.mktemp(), "wb") as fObj:
            fdesc._setCloseOnExec(fObj.fileno())
            status = self._execWithFileDescriptor(fObj)
            self.assertTrue(os.WIFEXITED(status))
            self.assertEqual(os.WEXITSTATUS(status), 0)

def test_unsetCloseOnExec(self):
        """
        A file descriptor passed to L{fdesc._unsetCloseOnExec} is inherited by
        a new process image created with one of the exec family of functions.
        """
        with open(self.mktemp(), "wb") as fObj:
            fdesc._setCloseOnExec(fObj.fileno())
            fdesc._unsetCloseOnExec(fObj.fileno())
            status = self._execWithFileDescriptor(fObj)
            self.assertTrue(os.WIFEXITED(status))
            self.assertEqual(os.WEXITSTATUS(status), 20)

${this.title}

Code Editor : test_fdesc.py