test_addr_in_use_error.js

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// Opening a second listening socket on the same address as an extant

// socket should elicit NS_ERROR_SOCKET_ADDRESS_IN_USE.

"use strict";

var CC = Components.Constructor;

const ServerSocket = CC(

  "@mozilla.org/network/server-socket;1",

  "nsIServerSocket",

  "init"

);

function testAddrInUse() {

  // Create listening socket:

  // any port (-1), loopback only (true), default backlog (-1)

  let listener = ServerSocket(-1, true, -1);

  Assert.ok(listener instanceof Ci.nsIServerSocket);

  // Try to create another listening socket on the same port, whatever that was.

  do_check_throws_nsIException(

    () => ServerSocket(listener.port, true, -1),

    "NS_ERROR_SOCKET_ADDRESS_IN_USE"

);

function run_test() {

  testAddrInUse();