1 files changed, 39 insertions, 0 deletions
diff --git a/testing/web-platform/tests/credential-management/fedcm-multi-idp/fedcm-multi-idp-mediation-optional.https.html b/testing/web-platform/tests/credential-management/fedcm-multi-idp/fedcm-multi-idp-mediation-optional.https.html
new file mode 100644
index 0000000000..1a819efb31
--- /dev/null
+++ b/testing/web-platform/tests/credential-management/fedcm-multi-idp/fedcm-multi-idp-mediation-optional.https.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<title>Federated Credential Management API multi IDP optional mediation tests.</title>
+<link rel="help" href="https://fedidcg.github.io/FedCM">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+
+<script type="module">
+import {request_options_with_two_idps,
+        fedcm_test,
+        fedcm_get_and_select_first_account,
+        fedcm_select_account_promise} from '../support/fedcm-helper.sub.js';
+
+fedcm_test(async t => {
+  return fedcm_get_and_select_first_account(t, request_options_with_two_idps('optional'));
+}, "Mediation optional can succeed without a returning account.");
+
+fedcm_test(async t => {
+  // Sign in to the first account.
+  await fedcm_get_and_select_first_account(t, request_options_with_two_idps());
+
+  // Now use mediation:optional and it should work.
+  return navigator.credentials.get(request_options_with_two_idps('optional'));
+}, "Mediation optional automatically succeeds when there is one returning account.");
+
+fedcm_test(async t => {
+  // Sign in to the first account.
+  await fedcm_get_and_select_first_account(t, request_options_with_two_idps());
+
+  // Sign in to the second account as well.
+  let cred = navigator.credentials.get(request_options_with_two_idps());
+  fedcm_select_account_promise(t, 1);
+  await cred;
+
+  // Now use mediation:optional.
+  return fedcm_get_and_select_first_account(t, request_options_with_two_idps('optional'));
+}, "Mediation optional can succeed when there is more than one returning account.");
+</script>