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<!DOCTYPE html>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script src="session-history-harness.js"></script>
<body>
<script>
const urlParams = new URLSearchParams(window.location.search);
const prerender = urlParams.get("prerender");
const testName = urlParams.get("testName");
const uid = urlParams.get("uid");
const prerenderChannel = new PrerenderChannel(
`prerender-channel-${testName}`, uid
);
const testChannel = new PrerenderChannel(`test-channel-${testName}`, uid);
// Activate when a test sends a "activate" message.
testChannel.addEventListener("message", (e) => {
assert(e.data === "activate");
window.location.href = `${prerender}?testName=${testName}&uid=${uid}`;
});
// Runs before and after the history manipulation in the prerender page to confirm
// that the session history of the initiator page is not affected by any history
// changes in the prerender page.
function assertInitialHistoryState() {
assert(history.length == 1, "Initial history length");
assert(!history.state, "Initial history state");
}
async function startPrerenderingAndWaitTestResult() {
const message = new Promise((resolve) => {
prerenderChannel.addEventListener(
"message",
(e) => {
resolve(e.data);
},
{ once: true }
);
});
assertInitialHistoryState();
startPrerendering(`${prerender}?testName=${testName}&uid=${uid}`);
const testResult = await message;
assertInitialHistoryState();
return testResult;
}
(async () => {
try {
testChannel.postMessage(await startPrerenderingAndWaitTestResult());
} catch (e) {
testChannel.postMessage("Failed: " + e.name + ": " + e.message);
} finally {
prerenderChannel.close();
}
})();
</script>
</body>