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+<!DOCTYPE HTML>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>Test back/forward after pushState</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+ <script>
+ SimpleTest.waitForExplicitFinish();
+ SimpleTest.requestFlakyTimeout("Need to wait to make sure an event does not fire");
+
+ async function runTest() {
+ let win = window.open();
+ let goneBackAndForwardOnce = new Promise((resolve) => {
+ let timeoutID;
+
+ // We should only get one load event in win.
+ let bc = new BroadcastChannel("bug1729662");
+ bc.addEventListener("message", () => {
+ bc.addEventListener("message", () => {
+ clearTimeout(timeoutID);
+ resolve(false);
+ });
+ }, { once: true });
+
+ let goneBack = false, goneForward = false;
+ win.addEventListener("popstate", ({ state }) => {
+ // We should only go back and forward once, if we get another
+ // popstate after that then we should fall through to the
+ // failure case below.
+ if (!(goneBack && goneForward)) {
+ // Check if this is the popstate for the forward (the one for
+ // back will have state == undefined).
+ if (state == 1) {
+ ok(goneBack, "We should have gone back before going forward");
+
+ goneForward = true;
+
+ // Wait a bit to make sure there are no more popstate events.
+ // eslint-disable-next-line mozilla/no-arbitrary-setTimeout
+ timeoutID = setTimeout(resolve, 1000, true);
+
+ return;
+ }
+
+ // Check if we've gone back once before, if we get another
+ // popstate after that then we should fall through to the
+ // failure case below.
+ if (!goneBack) {
+ goneBack = true;
+
+ return;
+ }
+ }
+
+ clearTimeout(timeoutID);
+ resolve(false);
+ });
+ });
+
+ win.location = "file_bug1729662.html";
+
+ ok(await goneBackAndForwardOnce, "Stopped navigating history");
+
+ win.close();
+
+ SimpleTest.finish();
+ }
+ </script>
+</head>
+<body onload="runTest();">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<pre id="test"></pre>
+</body>
+</html>