From df228765793c58a9a7aa25c8b808df529e049122 Mon Sep 17 00:00:00 2001
From: Domenic Denicola <d@domenic.me>
Date: Mon, 10 Oct 2022 18:59:47 +0900
Subject: [PATCH] Test which document history.go(0) reloads

See https://github.com/whatwg/html/issues/2436. Specified in https://github.com/whatwg/html/pull/6315.
---
 .../history_go_zero_which_document.window.js  | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 html/browsers/history/the-history-interface/history_go_zero_which_document.window.js

diff --git a/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js b/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js
new file mode 100644
index 00000000000000..f697783f3e586e
--- /dev/null
+++ b/html/browsers/history/the-history-interface/history_go_zero_which_document.window.js
@@ -0,0 +1,27 @@
+// META: title=history.go(0) on an iframe must reload the iframe's document, not the parent document
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/common/utils.js
+// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
+
+promise_test(async () => {
+  const rcHelper = new RemoteContextHelper();
+  const main = await rcHelper.addWindow();
+  await main.addIframe();
+
+  await main.executeScript(() => {
+    window.didNotGetReloaded = true;
+
+    const iframe = document.querySelector("iframe");
+
+    // This goes beyond the original test case in https://github.com/whatwg/html/issues/2436, and
+    // tests where current realm != relevant realm. The spec says to use relevant realm so the
+    // result is still, iframe must reload, not parent.
+    History.prototype.go.call(iframe.contentWindow.history, 0);
+
+    return new Promise(resolve => {
+      iframe.addEventListener("load", resolve);
+    });
+  });
+
+  assert_true(await main.executeScript(() => window.didNotGetReloaded));
+});