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async_test(function(t) {
var channel1 = new MessageChannel();
var channel2 = new MessageChannel();
var channel3 = new MessageChannel();
channel2.port2.onmessage = t.step_func(function (evt) {
channel3.port1.onmessage = t.step_func(function (evt) {
var counter = 0;
evt.ports[0].onmessage = t.step_func(function (evt) {
if (counter == 0) {
assert_equals(evt.data, "First");
counter = 1;
} else if (counter == 1) {
assert_equals(evt.data, "Second");
counter = 2;
} else if (counter == 2) {
assert_equals(evt.data, "Third");
counter = 3;
} else if (counter == 3) {
assert_equals(evt.data, "Fourth");
t.done();
}
});
channel1.port2.postMessage("Fourth");
});
channel1.port2.postMessage("Second");
channel1.port2.postMessage("Third");
channel3.port2.postMessage("2", evt.ports);
});
channel1.port2.postMessage("First");
channel2.port1.postMessage("1", [channel1.port1]);
}, `When transferring a non-enabled port mutiple times,
incoming messages sent at various transfer steps are received in order upon enablement.`);
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