1 files changed, 34 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html
new file mode 100644
index 0000000000..785ec024e0
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/location-assign-user-click.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/helpers.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<body>
+<script>
+"use strict";
+promise_test(async t => {
+  const sentinelIframe = await setupSentinelIframe(t);
+  const startingHistoryLength = history.length;
+
+  const code = `
+    const button = document.createElement("button");
+    button.id = "the-button";
+    button.textContent = "needs to have content to be clickable";
+    button.onclick = () => { location.assign("/common/blank.html?thereplacement"); };
+    document.currentScript.before(button);
+    parent.test_driver.click(button);
+  `;
+
+  const startURL = "resources/slow-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 waitForLoad(t, iframe, afterReplacementURL);
+  assert_equals(history.length, startingHistoryLength + 1, "history.length must change after waiting for the load");
+}, "NO replace before load, triggered by location.assign()");
+</script>