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//lib/python3/dist-packages/twisted/test/test_abstract.py

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

"""
Tests for generic file descriptor based reactor support code.
"""

from socket import AF_IPX

from twisted.internet.abstract import isIPAddress
from twisted.trial.unittest import TestCase

class AddressTests(TestCase):
    """
    Tests for address-related functionality.
    """

def test_decimalDotted(self) -> None:
        """
        L{isIPAddress} should return C{True} for any decimal dotted
        representation of an IPv4 address.
        """
        self.assertTrue(isIPAddress("0.1.2.3"))
        self.assertTrue(isIPAddress("252.253.254.255"))

def test_shortDecimalDotted(self) -> None:
        """
        L{isIPAddress} should return C{False} for a dotted decimal
        representation with fewer or more than four octets.
        """
        self.assertFalse(isIPAddress("0"))
        self.assertFalse(isIPAddress("0.1"))
        self.assertFalse(isIPAddress("0.1.2"))
        self.assertFalse(isIPAddress("0.1.2.3.4"))

def test_invalidLetters(self) -> None:
        """
        L{isIPAddress} should return C{False} for any non-decimal dotted
        representation including letters.
        """
        self.assertFalse(isIPAddress("a.2.3.4"))
        self.assertFalse(isIPAddress("1.b.3.4"))

def test_invalidPunctuation(self) -> None:
        """
        L{isIPAddress} should return C{False} for a string containing
        strange punctuation.
        """
        self.assertFalse(isIPAddress(","))
        self.assertFalse(isIPAddress("1,2"))
        self.assertFalse(isIPAddress("1,2,3"))
        self.assertFalse(isIPAddress("1.,.3,4"))

def test_emptyString(self) -> None:
        """
        L{isIPAddress} should return C{False} for the empty string.
        """
        self.assertFalse(isIPAddress(""))

def test_invalidNegative(self) -> None:
        """
        L{isIPAddress} should return C{False} for negative decimal values.
        """
        self.assertFalse(isIPAddress("-1"))
        self.assertFalse(isIPAddress("1.-2"))
        self.assertFalse(isIPAddress("1.2.-3"))
        self.assertFalse(isIPAddress("1.2.-3.4"))

def test_invalidPositive(self) -> None:
        """
        L{isIPAddress} should return C{False} for a string containing
        positive decimal values greater than 255.
        """
        self.assertFalse(isIPAddress("256.0.0.0"))
        self.assertFalse(isIPAddress("0.256.0.0"))
        self.assertFalse(isIPAddress("0.0.256.0"))
        self.assertFalse(isIPAddress("0.0.0.256"))
        self.assertFalse(isIPAddress("256.256.256.256"))

def test_unicodeAndBytes(self) -> None:
        """
        L{isIPAddress} evaluates ASCII-encoded bytes as well as text.
        """
        # we test passing bytes but don't support bytes in the type annotation
        self.assertFalse(isIPAddress(b"256.0.0.0"))  # type: ignore[arg-type]
        self.assertFalse(isIPAddress("256.0.0.0"))
        self.assertTrue(isIPAddress(b"252.253.254.255"))  # type: ignore[arg-type]
        self.assertTrue(isIPAddress("252.253.254.255"))

def test_nonIPAddressFamily(self) -> None:
        """
        All address families other than C{AF_INET} and C{AF_INET6} result in a
        L{ValueError} being raised.
        """
        self.assertRaises(ValueError, isIPAddress, b"anything", AF_IPX)

def test_nonASCII(self) -> None:
        """
        All IP addresses must be encodable as ASCII; non-ASCII should result in
        a L{False} result.
        """
        # we test passing bytes but don't support bytes in the type annotation
        self.assertFalse(isIPAddress(b"\xff.notascii"))  # type: ignore[arg-type]
        self.assertFalse(isIPAddress("\u4321.notascii"))

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