1 files changed, 53 insertions, 0 deletions
diff --git a/testing/web-platform/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html b/testing/web-platform/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html
new file mode 100644
index 0000000000..a09b07e5b7
--- /dev/null
+++ b/testing/web-platform/tests/cookies/third-party-cookies/resources/third-party-cookies-cross-site-popup-opener.html
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<meta charset="utf-8" />
+<meta name="timeout" content="long">
+<title>Window that opens a popup in a cross-site context</title>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/cookies/resources/cookie-helper.sub.js"></script>
+<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>
+
+<body>
+  <script>
+
+    let origin;
+
+    // Test that parent window passed its origin in the URL parameters correctly.
+    test(() => {
+      assert_true(window.location.search.startsWith("?origin="));
+      origin = decodeURIComponent(window.location.search.slice(
+        window.location.search.indexOf("?origin=") + 8));
+    }, "Cross-site window opened correctly");
+
+    // Cookies set by the parent window in a 1P context.
+    const cookieNames = ["1P_http", "1P_dom"];
+    if (window.cookieStore) {
+      cookieNames.push("1P_cs");
+    }
+
+    // Verify whether third-party cookies are blocked by default.
+    if (navigator.userAgent.toLowerCase().indexOf('firefox') == -1) {
+      assertThirdPartyHttpCookies({
+        desc: "3P fetch",
+        origin,
+        cookieNames,
+        expectsCookie: false,
+      });
+    } else {
+      // Default behavior for third-party cookie blocking is flaky in Firefox.
+      throw new AssertionError("Testing default third-party cookie blocking is not implemented in Firefox.");
+    }
+
+    // Open the cookies' origin in a popup to activate the heuristic.
+    const popupUrl = new URL(
+      "/cookies/third-party-cookies/resources/" +
+      "third-party-cookies-cross-site-popup.html",
+      origin);
+    const popup = window.open(popupUrl);
+
+    fetch_tests_from_window(popup);
+
+  </script>
+</body>