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+<!doctype html>
+<title>Referrer Policy: navigating back to an about:srcdoc iframe reuses the original referrer policy</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="resources/make-html-script.js"></script>
+<meta name="referrer" content="no-referrer">
+<div id="log"></div>
+<script>
+ let reportedReferrer = () => {
+ return new Promise(resolve => {
+ window.addEventListener("message", function listener(msg) {
+ window.removeEventListener("message", listener, false);
+ resolve(msg.data.referrer);
+ });
+ });
+ };
+
+ let iframeLoaded = iframe => {
+ return new Promise(resolve => {
+ iframe.onload = resolve;
+ });
+ };
+
+ promise_test(async t => {
+ // 1. Create an about:srcdoc iframe.
+ const iframe = document.createElement("iframe");
+ iframe.name = 'test_frame';
+ let iframe_load_1 = iframeLoaded(iframe);
+ let referrer_1 = reportedReferrer();
+ iframe.srcdoc = createScriptString(get_host_info().REMOTE_ORIGIN,
+ location.origin + "/custom");
+ document.body.appendChild(iframe);
+ await iframe_load_1;
+ let referrer_1_result = await referrer_1;
+
+ // 2. Change the referrer policy of the main document.
+ document.getElementsByTagName('meta')[0].content = "unsafe-url";
+
+ // 3. Navigate the iframe elsewhere.
+ let iframe_load_2 = iframeLoaded(iframe);
+ window.open('/referrer-policy', 'test_frame');
+ await iframe_load_2;
+
+ // 4. Navigate the iframe back.
+ let iframe_load_3 = iframeLoaded(iframe);
+ let referrer_2 = reportedReferrer();
+ iframe.contentWindow.history.back();
+ await iframe_load_3;
+
+ // Despite the main document has changed its referrer policy in (2), the
+ // reported referrer for the history navigation to about:srcdoc in (4) must
+ // match with the one originally reported in (1).
+ assert_equals(referrer_1_result, undefined,
+ "First navigation uses correct policy.");
+ assert_equals(await referrer_2, undefined,
+ "History navigation reuses original policy.");
+ }, "History navigation reuses original policy.");
+
+ promise_test(async t => {
+ // If we initiate a new about:srcdoc navigation, the new referrer policy
+ // should apply.
+ const new_iframe = document.createElement("iframe");
+ let new_iframe_load = iframeLoaded(new_iframe);
+ let new_iframe_referrer = reportedReferrer();
+ new_iframe.srcdoc = createScriptString(get_host_info().REMOTE_ORIGIN,
+ location.origin + "/custom");
+ document.body.appendChild(new_iframe);
+ await new_iframe_load;
+
+ assert_equals(await new_iframe_referrer, self.origin + '/custom');
+ }, "New srcdoc iframe uses new policy.");
+</script>