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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.names.resolve}.
"""
from twisted.names.error import DomainError
from twisted.names.resolve import ResolverChain
from twisted.trial.unittest import TestCase
class ResolverChainTests(TestCase):
"""
Tests for L{twisted.names.resolve.ResolverChain}
"""
def test_emptyResolversList(self):
"""
L{ResolverChain._lookup} returns a L{DomainError} failure if
its C{resolvers} list is empty.
"""
r = ResolverChain([])
d = r.lookupAddress("www.example.com")
f = self.failureResultOf(d)
self.assertIs(f.trap(DomainError), DomainError)
def test_emptyResolversListLookupAllRecords(self):
"""
L{ResolverChain.lookupAllRecords} returns a L{DomainError}
failure if its C{resolvers} list is empty.
"""
r = ResolverChain([])
d = r.lookupAllRecords("www.example.com")
f = self.failureResultOf(d)
self.assertIs(f.trap(DomainError), DomainError)