1 files changed, 53 insertions, 0 deletions
diff --git a/testing/web-platform/tests/reporting/same-origin-cross-site-credentials.https.sub.html b/testing/web-platform/tests/reporting/same-origin-cross-site-credentials.https.sub.html
new file mode 100644
index 0000000000..258ab8e103
--- /dev/null
+++ b/testing/web-platform/tests/reporting/same-origin-cross-site-credentials.https.sub.html
@@ -0,0 +1,53 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test that credentials are sent properly in a same-origin but not same-site context</title>
+  <script src='/resources/testharness.js'></script>
+  <script src='/resources/testharnessreport.js'></script>
+  <script src='resources/report-helper.js'></script>
+</head>
+<body>
+  <script>
+    const base_url = `${location.protocol}//${location.host}`;
+    const endpoint = `${base_url}/reporting/resources/report.py`;
+    const id = 'd0d517bf-891b-457a-b970-8b2b2c81a0bf';
+
+    promise_test(async t => {
+      // If this is not run from the expected origin, then the A->B->A frame embedding will not be correct,
+      // and the cookies set in the top-level page will never be returned with the reports.
+      assert_true(location.href.startsWith("https://{{hosts[][]}}:{{ports[https][0]}}/"),
+                  "Test running on unexpected origin; subsequent assertions will fail.");
+
+      // Set credentials, and set up test to clear them afterwards.
+      await fetch('/cookies/resources/setSameSite.py?reporting', {mode: 'no-cors', credentials: 'include', cache: 'no-store'});
+      t.add_cleanup(() => fetch("/cookies/resources/dropSameSite.py", {mode: 'no-cors', credentials: 'include', cache: 'no-store'}));
+
+      // Insert a cross-origin frame which will then frame this origin to
+      // trigger a CSP error.
+      const frame = document.createElement('iframe');
+      frame.src = "https://{{hosts[alt][]}}:{{ports[https][0]}}/reporting/resources/middle-frame.https.sub.html";
+      document.body.appendChild(frame);
+
+      // Wait for the inner frame to signal that the report has been generated.
+      await new Promise(resolve => {
+        window.addEventListener('message', ev => {
+          if (ev.data === "done")
+            resolve(ev.data);
+          });
+        document.body.appendChild(frame);
+      });
+
+      const reports = await pollReports(endpoint, id);
+      checkReportExists(reports, 'csp-violation', "https://{{hosts[][]}}:{{ports[https][0]}}/reporting/resources/same-origin-report.https.sub.html");
+
+      // Same-site: None cookies should be sent, but not Lax, Strict, or default cookies.
+      const cookies = await pollCookies(endpoint, id);
+      assert_equals(cookies.samesite_none, "[samesite_none=reporting]", "Credential value was correct");
+      assert_false("samesite_strict" in cookies, "Same-site: Strict cookies should not be sent");
+      assert_false("samesite_lax" in cookies, "Same-site: Lax cookies should not be sent");
+      assert_false("samesite_unspecified" in cookies, "Same-site unspecified cookies should not be sent");
+      assert_equals(Object.keys(cookies).length, 1, "No additional cookies were received");
+    }, "Reporting endpoints received credentials.");
+  </script>
+</body>
+</html>