LayoutTests/fast/events/message-port-start-and-close-same-microtask.html - Issue 720543005: Fix MessagePort race exposed by blink scheduler

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Issue 720543005: Fix MessagePort race exposed by blink scheduler (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Fix test descriptions which had got mixed up. Created 6 years, 1 month ago

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1 <body>	1 <body>

2 <p>Test Closed MessagePort Whether Receive Message Or Not.</p>	2 <p>Test whether opening and closing a messageport in the same microtask correctl y discards an in-flight message.</p>

3 <p>Should be a START message, followed with DONE.</p>	3 <p>Should be a START message, followed with DONE.</p>

4 <pre id=log></pre>	4 <pre id=log></pre>

5 <script>	5 <script>

6 function log(message)	6 function log(message)

7 {	7 {

8 document.getElementById("log").innerHTML += message + "<br>";	8 document.getElementById("log").innerHTML += message + "<br>";

9 }	9 }

10	10

11 if (window.testRunner) {	11 if (window.testRunner) {

12 testRunner.dumpAsText();	12 testRunner.dumpAsText();

13 testRunner.waitUntilDone();	13 testRunner.waitUntilDone();

14 }	14 }

15	15

16 log("START");	16 log("START");

17	17

18 var channel = new MessageChannel;	18 var channel = new MessageChannel;

19 channel.port1.onmessage = function(evt) {	19 channel.port2.postMessage("This message can't be received");

20 log("Closed port receiving: FAIL. Got Message: " + evt.data + " after close ");	20 openThenClose();

	21 done();

	22

	23 function openThenClose() {

	24 setTimeout(function() {

	25 channel.port1.onmessage = function(evt) {

	26 log("Closed port receiving: FAIL. Got Message: " + evt.data + " aft er close");

	27 }

	28 channel.port1.close();

	29 }, 0);

21 }	30 }

22 channel.port1.close();

23 channel.port2.postMessage("This message can't be received");

24 done();

25	31

26 function done() {	32 function done() {

27 // Wait a short period of time to ensure no messages come in from previous t ests.	33 // Wait a short period of time to ensure no messages come in from previous t ests.

28 setTimeout(function() {	34 setTimeout(function() {

29 log("DONE");	35 log("DONE");

30 if (window.testRunner)	36 if (window.testRunner)

31 testRunner.notifyDone();	37 testRunner.notifyDone();

32 }, 100);	38 }, 100);

33 }	39 }

34	40

35 </script>	41 </script>

36 </body>	42 </body>

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