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-rw-r--r--testing/web-platform/tests/cookies/samesite/about-blank-nested.https.html29
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diff --git a/testing/web-platform/tests/cookies/samesite/about-blank-nested.https.html b/testing/web-platform/tests/cookies/samesite/about-blank-nested.https.html
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index 0000000000..d5c9b8ada3
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+++ b/testing/web-platform/tests/cookies/samesite/about-blank-nested.https.html
@@ -0,0 +1,29 @@
+<!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 src="about:blank" id="if">
+ </iframe>
+ <script>
+ function doTests() {
+ promise_test(async function(t) {
+ var child = document.getElementById("if");
+ var grandKid = child.contentDocument.createElement("iframe");
+ child.contentDocument.body.appendChild(grandKid);
+ var value = "" + Math.random();
+ await resetSameSiteCookies(SECURE_ORIGIN, value);
+
+ // Using postToParent.py here to see cookies used when navigating the page.
+ grandKid.src = SECURE_ORIGIN + "/cookies/resources/postToParent.py"
+ var e = await wait_for_message("COOKIES", SECURE_ORIGIN);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_unspecified", value, true);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_lax", value, true);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_strict", value, true);
+ assert_cookie(SECURE_ORIGIN, e.data, "samesite_none", value, true);
+ }, "SameSite cookies with intervening about:blank iframes and navigation");
+ }
+ </script>
+</body>