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-rw-r--r--testing/web-platform/tests/cookies/samesite/sandbox-iframe-nested.https.html28
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diff --git a/testing/web-platform/tests/cookies/samesite/sandbox-iframe-nested.https.html b/testing/web-platform/tests/cookies/samesite/sandbox-iframe-nested.https.html
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index 0000000000..310f86a446
--- /dev/null
+++ b/testing/web-platform/tests/cookies/samesite/sandbox-iframe-nested.https.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<head>
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+ <script src="/cookies/resources/cookie-helper.sub.js"></script>
+</head>
+<body onload="doTests()">
+ <iframe id="if" sandbox="allow-scripts">
+ </iframe>
+ <script>
+ function doTests() {
+ promise_test(async function(t) {
+ var value = "" + Math.random();
+ await resetSameSiteCookies(SECURE_ORIGIN, value);
+ var child = document.getElementById("if");
+ child.src = SECURE_ORIGIN + "/cookies/samesite/resources/iframe-navigate-report.html";
+
+ // the iframe nested inside if should post COOKIES to here.
+ var e = await wait_for_message("COOKIES");
+ // Not testing unspecified here as to not depend on the presence or
+ // absence of upcoming change of behavior.
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_lax", value, false);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_strict", value, false);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_none", value, true);
+ }, "SameSite cookies with intervening sandboxed iframe and navigation");
+ }
+ </script>
+</body>