1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/cross-origin-opener-policy/coop-navigate-same-origin-csp-sandbox.html b/testing/web-platform/tests/html/cross-origin-opener-policy/coop-navigate-same-origin-csp-sandbox.html
new file mode 100644
index 0000000000..83113de376
--- /dev/null
+++ b/testing/web-platform/tests/html/cross-origin-opener-policy/coop-navigate-same-origin-csp-sandbox.html
@@ -0,0 +1,63 @@
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="./resources/common.js"></script>
+<script>
+
+const executor_path = '/common/dispatcher/executor.html?pipe=';
+
+const https_origin = get_host_info().HTTPS_ORIGIN;
+const coop_same_origin =
+    '|header(Cross-Origin-Opener-Policy,same-origin)';
+const csp_sandbox =
+    '|header(Content-Security-Policy, sandbox allow-scripts)';
+
+promise_test(async test => {
+  const driver_token = token();
+
+  // 1. Start from a COOP:same-origin document.
+  const opener_token = token();
+  const opener_url = https_origin + executor_path + coop_same_origin +
+    `&uuid=${opener_token}`;
+  const w = window.open(opener_url);
+  add_completion_callback(() => w.close());
+
+  // 2. It opens a popups, and then navigates the popup toward a same-origin
+  // COOP:same-origin document with CSP:sandbox
+  const openee_token = token();
+  const openee_url = https_origin + executor_path + coop_same_origin +
+    csp_sandbox + `&uuid=${openee_token}`;
+  send(opener_token, `
+    openee = window.open("${openee_url}");
+  `);
+  add_completion_callback(() => send(openee_token, "close()"));
+
+  // Because of CSP:sandbox, the popup is not considered same-origin with
+  // its openee. Check the openee/opener relationship is now closed.
+  send(openee_token, `
+    if (opener)
+      send("${driver_token}", "Error: have opener");
+    else
+      send("${driver_token}", "Success: no opener");
+  `);
+  assert_equals(await receive(driver_token), "Success: no opener");
+
+  // Technically, the opener's "openee" WindowProxy should appear as closed at
+  // this time. The popup loaded a new document, and at least two fetch requests
+  // were made. This is more than enough. However, in theory, there is nothing
+  // to guarantee we can observe "openee.close". Wait a bit to ensure this will
+  // never flake.
+  await new Promise(r => test.step_timeout(r, 1000));
+
+  send(opener_token, `
+    if (openee.closed)
+      send("${driver_token}", "Success: openee closed");
+    else
+      send("${driver_token}", "Error: can still access openee");
+  `);
+  assert_equals(await receive(driver_token), "Success: openee closed");
+});
+
+</script>