third_party/WebKit/LayoutTests/http/tests/websocket/multiple-connections.html

   1 <!DOCTYPE html>
   2 <script src="/js-test-resources/js-test.js"></script>
   3 <script>
   4 description("Test that WebSockets are not subject to the HTTP connection limit.");
   5
   6 window.jsTestIsAsync = true;
   7
   8 const SOCKETS_TO_OPEN = 50;
   9 // PARALLELISM limits the number of connections we try to open simultaneously.
  10 // This avoids triggering the throttling added in http://crrev.com/972963002,
  11 // which slows the test down considerably. 4 is the maximum number of
  12 // simultaneous pending connections guaranteeed to have zero throttling delay
  13 // applied, but parallelism of 2 seems to give the best performance in practice.
  14 const PARALLELISM = 2;
  15
  16 var socketsOpened = 0;
  17 var sockets = [];
  18
  19 function createNewWebSocket()
  20 {
  21     var ws = new WebSocket("ws://127.0.0.1:8880/echo");
  22     sockets.push(ws);
  23     ws.onopen = function() {
  24         if (sockets.length < SOCKETS_TO_OPEN) {
  25             createNewWebSocket();
  26         }
  27         ++socketsOpened;
  28         if (socketsOpened == SOCKETS_TO_OPEN) {
  29             cleanUpSocketsAndFinish();
  30         }
  31     };
  32     ws.onclose = function() {
  33         testFailed("unexpected close event");
  34         cleanUpSocketsAndFinish();
  35     };
  36 }
  37
  38 function cleanUpSocketsAndFinish()
  39 {
  40     for (var ws of sockets) {
  41         ws.onclose = null;
  42         ws.close();
  43     }
  44     shouldBeEqualToNumber("socketsOpened", SOCKETS_TO_OPEN);
  45     finishJSTest();
  46 }
  47
  48 for (var i = 0; i < PARALLELISM; ++i) {
  49     createNewWebSocket();
  50 }
  51 </script>