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Test Info:

  • This WPT test may be referenced by the following Test IDs:
<!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 startURL = "resources/code-injector.html?pipe=sub(none)&code=" + encodeURIComponent("location.assign(`/common/blank.html?thereplacement`);");
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, "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 before load, triggered by location.assign()");
</script>