LayoutTests/fast/events/resources/message-port-multi.js

   1 if (window.layoutTestController) {
   2     layoutTestController.dumpAsText();
   3     layoutTestController.waitUntilDone();
   4 }
   5
   6 description("This test checks the various use cases around sending multiple ports through MessagePort.postMessage");
   7
   8 var channel = new MessageChannel();
   9 var channel2 = new MessageChannel();
  10 var channel3 = new MessageChannel();
  11 var channel4 = new MessageChannel();
  12
  13 channel.port1.postMessage("noport");
  14 channel.port1.postMessage("zero ports", []);
  15 channel.port1.postMessage("two ports", [channel2.port1, channel2.port2]);
  16
  17 // Now test various failure cases
  18 shouldThrow('channel.port1.postMessage("same port", [channel.port1])');
  19 shouldThrow('channel.port1.postMessage("entangled port", [channel.port2])');
  20 shouldThrow('channel.port1.postMessage("null port", [channel3.port1, null, channel3.port2])');
  21 shouldThrow('channel.port1.postMessage("notAPort", [channel3.port1, {}, channel3.port2])');
  22 // Should be OK to send channel3.port1 (should not have been disentangled by the previous failed calls).
  23 channel.port1.postMessage("entangled ports", [channel3.port1, channel3.port2]);
  24
  25 shouldThrow('channel.port1.postMessage("notAnArray", channel3.port1)')
  26 shouldThrow('channel.port1.postMessage("notASequence", [{length: 3}])');
  27
  28 // Should not crash (we should figure out that the array contains undefined
  29 // entries).
  30 var largePortArray = [];
  31 largePortArray[1234567890] = channel4.port1;
  32 shouldThrow('channel.port1.postMessage("largeSequence", largePortArray)');
  33
  34 channel.port1.postMessage("done");
  35
  36 function testTransfers() {
  37     var channel0 = new MessageChannel();
  38
  39     var c1 = new MessageChannel();
  40     channel0.port1.webkitPostMessage({id:"send-port", port:c1.port1}, [c1.port1]);
  41     var c2 = new MessageChannel();
  42     channel0.port1.webkitPostMessage({id:"send-port-twice", port0:c2.port1, port1:c2.port1}, [c2.port1]);
  43     var c3 = new MessageChannel();
  44     channel0.port1.webkitPostMessage({id:"send-two-ports", port0:c3.port1, port1:c3.port2}, [c3.port1, c3.port2]);
  45     var c4 = new MessageChannel();
  46     try {
  47         channel0.port1.webkitPostMessage({id:"host-object", hostObject:c3, port:c4.port1}, [c4.port1]);
  48         testFailed("Sending host object should throw");
  49     } catch(e) {
  50         testPassed("Sending host object has thrown " + e);
  51     }
  52     c4.port1.postMessage("Should succeed");
  53     channel0.port1.webkitPostMessage({id:"done"});
  54
  55     channel0.port2.onmessage = function(event) {
  56         if (event.data.id == "send-port") {
  57             if (event.ports && event.ports.length > 0 && event.ports[0] === event.data.port)
  58                 testPassed("send-port: transferred one port");
  59             else
  60                 testFailed("send-port: port transfer failed");
  61         } else if (event.data.id == "send-port-twice") {
  62             if (event.ports && event.ports.length == 1 &&
  63                   event.ports[0] === event.data.port0 && event.ports[0] === event.data.port1)
  64                 testPassed("send-port-twice: transferred one port twice");
  65             else
  66                 testFailed("send-port-twice: failed to transfer one port twice");
  67         } else if (event.data.id == "send-two-ports") {
  68             if (event.ports && event.ports.length == 2 &&
  69                   event.ports[0] === event.data.port0 && event.ports[1] === event.data.port1)
  70                 testPassed("send-two-ports: transferred two ports");
  71             else
  72                 testFailed("send-two-ports: failed to transfer two ports");
  73         } else if (event.data.id == "done") {
  74             debug('<br><span class="pass">TEST COMPLETE</span>');
  75             if (window.layoutTestController)
  76             layoutTestController.notifyDone();
  77         } else {
  78             testFailed("Unexpected message " + event.data);
  79         }
  80     }
  81 }
  82
  83 channel.port2.onmessage = function(event) {
  84     if (event.data == "noport") {
  85         if (event.ports && !event.ports.length)
  86             testPassed("event.ports is non-null and zero length when no port sent");
  87         else
  88             testFailed("event.ports is null or non-zero length when no port sent");
  89     } else if (event.data == "zero ports") {
  90         if (event.ports && !event.ports.length)
  91             testPassed("event.ports is non-null and zero length when empty array sent");
  92         else
  93             testFailed("event.ports is null or non-zero length when empty array sent");
  94     } else if (event.data == "two ports") {
  95         if (!event.ports) {
  96             testFailed("event.ports should be non-null when ports sent");
  97             return;
  98         }
  99         if (event.ports.length == 2)
 100             testPassed("event.ports contains two ports when two ports sent");
 101         else
 102             testFailed("event.ports contained " + event.ports.length + " when two ports sent");
 103
 104     } else if (event.data == "entangled ports") {
 105         if (event.ports.length == 2)
 106             testPassed("event.ports contains two ports when two ports re-sent after error");
 107         else
 108             testFailed("event.ports contained " + event.ports.length + " when two ports re-sent after error");
 109     } else if (event.data == "done") {
 110         testTransfers();
 111     } else
 112         testFailed("Received unexpected message: " + event.data);
 113 }
 114