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

"""
Tests for L{twisted.internet.abstract}, a collection of APIs for implementing
reactors.
"""

from __future__ import division, absolute_import

from twisted.trial.unittest import SynchronousTestCase

from twisted.internet.abstract import isIPv6Address

class IPv6AddressTests(SynchronousTestCase):
"""
Tests for L{isIPv6Address}, a function for determining if a particular
string is an IPv6 address literal.
"""
def test_empty(self):
"""
The empty string is not an IPv6 address literal.
"""
self.assertFalse(isIPv6Address(""))


def test_colon(self):
"""
A single C{":"} is not an IPv6 address literal.
"""
self.assertFalse(isIPv6Address(":"))


def test_loopback(self):
"""
C{"::1"} is the IPv6 loopback address literal.
"""
self.assertTrue(isIPv6Address("::1"))


def test_scopeID(self):
"""
An otherwise valid IPv6 address literal may also include a C{"%"}
followed by an arbitrary scope identifier.
"""
self.assertTrue(isIPv6Address("fe80::1%eth0"))
self.assertTrue(isIPv6Address("fe80::2%1"))
self.assertTrue(isIPv6Address("fe80::3%en2"))


def test_invalidWithScopeID(self):
"""
An otherwise invalid IPv6 address literal is still invalid with a
trailing scope identifier.
"""
self.assertFalse(isIPv6Address("%eth0"))
self.assertFalse(isIPv6Address(":%eth0"))
self.assertFalse(isIPv6Address("hello%eth0"))