1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html
new file mode 100644
index 0000000000..886bf469a2
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-during-pageshow.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/helpers.js"></script>
+
+<body>
+<script>
+"use strict";
+promise_test(async t => {
+  const sentinelIframe = await setupSentinelIframe(t);
+  const startingHistoryLength = history.length;
+
+  const code = `
+    window.onpageshow = () => {
+      const form = document.createElement("form");
+      form.action = "/common/blank.html";
+
+      const input = document.createElement("input");
+      input.type = "hidden";
+      input.name = "thereplacement";
+      form.append(input);
+
+      document.body.append(form);
+      form.submit();
+    };
+  `;
+
+  const startURL = "resources/code-injector.html?pipe=sub(none)&code=" + encodeURIComponent(code);
+  const afterReplacementURL = "/common/blank.html?thereplacement=";
+  const iframe = insertIframe(t, startURL);
+
+  assert_equals(history.length, startingHistoryLength, "Inserting the under-test iframe must not change history.length");
+
+  await waitForLoadAllowingIntermediateLoads(t, iframe, afterReplacementURL);
+  assert_equals(history.length, startingHistoryLength, "history.length must not change after waiting for the replacement");
+
+  await checkSentinelIframe(t, sentinelIframe);
+  assert_equals(history.length, startingHistoryLength, "history.length must not change after checking the sentinel iframe");
+}, "Replace during the pageshow event, triggered by formElement.submit()");
+</script>