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Test Info:

"use strict";
var ioService = Services.io;
var prefs = Services.prefs;
var mainThread = Services.tm.currentThread;
var listener1 = {
onLookupComplete(inRequest, inRecord, inStatus) {
Assert.equal(inStatus, Cr.NS_ERROR_OFFLINE);
test2();
do_test_finished();
},
};
var listener2 = {
onLookupComplete(inRequest, inRecord, inStatus) {
Assert.equal(inStatus, Cr.NS_OK);
inRecord.QueryInterface(Ci.nsIDNSAddrRecord);
var answer = inRecord.getNextAddrAsString();
Assert.ok(answer == "127.0.0.1" || answer == "::1");
test3();
do_test_finished();
},
};
var listener3 = {
onLookupComplete(inRequest, inRecord, inStatus) {
Assert.equal(inStatus, Cr.NS_OK);
inRecord.QueryInterface(Ci.nsIDNSAddrRecord);
var answer = inRecord.getNextAddrAsString();
Assert.ok(answer == "127.0.0.1" || answer == "::1");
cleanup();
do_test_finished();
},
};
const defaultOriginAttributes = {};
function run_test() {
do_test_pending();
prefs.setBoolPref("network.dns.offline-localhost", false);
// We always resolve localhost as it's hardcoded without the following pref:
prefs.setBoolPref("network.proxy.allow_hijacking_localhost", true);
ioService.offline = true;
try {
Services.dns.asyncResolve(
"localhost",
Ci.nsIDNSService.RESOLVE_TYPE_DEFAULT,
0,
null, // resolverInfo
listener1,
mainThread,
defaultOriginAttributes
);
} catch (e) {
Assert.equal(e.result, Cr.NS_ERROR_OFFLINE);
test2();
do_test_finished();
}
}
function test2() {
do_test_pending();
prefs.setBoolPref("network.dns.offline-localhost", true);
ioService.offline = false;
ioService.offline = true;
// we need to let the main thread run and apply the changes
do_timeout(0, test2Continued);
}
function test2Continued() {
Services.dns.asyncResolve(
"localhost",
Ci.nsIDNSService.RESOLVE_TYPE_DEFAULT,
0,
null, // resolverInfo
listener2,
mainThread,
defaultOriginAttributes
);
}
function test3() {
do_test_pending();
ioService.offline = false;
// we need to let the main thread run and apply the changes
do_timeout(0, test3Continued);
}
function test3Continued() {
Services.dns.asyncResolve(
"localhost",
Ci.nsIDNSService.RESOLVE_TYPE_DEFAULT,
0,
null, // resolverInfo
listener3,
mainThread,
defaultOriginAttributes
);
}
function cleanup() {
prefs.clearUserPref("network.dns.offline-localhost");
prefs.clearUserPref("network.proxy.allow_hijacking_localhost");
}