1 files changed, 64 insertions, 0 deletions
diff --git a/dom/broadcastchannel/tests/test_ordering.html b/dom/broadcastchannel/tests/test_ordering.html
new file mode 100644
index 0000000000..5dd36bc77d
--- /dev/null
+++ b/dom/broadcastchannel/tests/test_ordering.html
@@ -0,0 +1,64 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for BroadcastChannel.postMessage invalid State</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+
+<div id="content"></div>
+
+<script type="application/javascript">
+
+let c1 = new BroadcastChannel("order");
+let c2 = new BroadcastChannel("order");
+let c3 = new BroadcastChannel("order");
+
+let events = [];
+let doneCount = 0;
+
+function whichBC(bc) {
+  if (bc == c1) return "c1";
+  if (bc == c2) return "c2";
+  if (bc == c3) return "c3";
+  return "What?!?";
+}
+
+function handler(e) {
+  events.push(e);
+  if (e.data == "done") {
+    doneCount++;
+    if (doneCount == 2) {
+      is(events.length, 6, "Correct length");
+      is(whichBC(events[0].target), "c2", "target for event 0");
+      is(events[0].data, "from c1");
+      is(whichBC(events[1].target), "c3", "target for event 1");
+      is(events[1].data, "from c1");
+      is(whichBC(events[2].target), "c1", "target for event 2");
+      is(events[2].data, "from c3");
+      is(whichBC(events[3].target), "c2", "target for event 3");
+      is(events[3].data, "from c3");
+      is(whichBC(events[4].target), "c1", "target for event 4");
+      is(events[4].data, "done");
+      is(whichBC(events[5].target), "c3", "target for event 5");
+      is(events[5].data, "done");
+
+      SimpleTest.finish();
+    }
+  }
+}
+
+c1.onmessage = handler;
+c2.onmessage = handler;
+c3.onmessage = handler;
+
+c1.postMessage("from c1");
+c3.postMessage("from c3");
+c2.postMessage("done");
+
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</body>
+</html>