1 files changed, 99 insertions, 0 deletions
diff --git a/testing/web-platform/tests/credential-management/support/fedcm-helper.sub.js b/testing/web-platform/tests/credential-management/support/fedcm-helper.sub.js
new file mode 100644
index 0000000000..87a1337a06
--- /dev/null
+++ b/testing/web-platform/tests/credential-management/support/fedcm-helper.sub.js
@@ -0,0 +1,99 @@
+const alt_manifest_origin = 'https://{{hosts[alt][]}}:{{ports[https][0]}}';
+
+// Set the identity provider cookie.
+export function set_fedcm_cookie(host) {
+  return new Promise(resolve => {
+    if (host == undefined) {
+      document.cookie = 'cookie=1; SameSite=Strict; Path=/credential-management/support; Secure';
+      resolve();
+    } else {
+      let popup_window = window.open(host + '/credential-management/support/set_cookie');
+
+      const popup_message_handler = (event) => {
+        if (event.origin == host) {
+          popup_window.close();
+          window.removeEventListener('message', popup_message_handler);
+          resolve();
+        }
+      };
+
+      window.addEventListener('message', popup_message_handler);
+    }
+  });
+}
+
+// Set the alternate identity provider cookie.
+export function set_alt_fedcm_cookie() {
+  return set_fedcm_cookie(alt_manifest_origin);
+}
+
+// Returns FedCM CredentialRequestOptions for which navigator.credentials.get()
+// succeeds.
+export function default_request_options(manifest_filename) {
+  if (manifest_filename === undefined) {
+    manifest_filename = "manifest.py";
+  }
+  const manifest_path = `https://{{host}}:{{ports[https][0]}}/\
+credential-management/support/fedcm/${manifest_filename}`;
+  return {
+    identity: {
+      providers: [{
+        configURL: manifest_path,
+        clientId: '1',
+        nonce: '2',
+      }]
+    }
+  };
+}
+
+// Returns alternate FedCM CredentialRequestOptions for which navigator.credentials.get()
+// succeeds.
+export function default_alt_request_options(manifest_filename) {
+  if (manifest_filename === undefined) {
+    manifest_filename = "manifest.py";
+  }
+  const manifest_path = `${alt_manifest_origin}/\
+credential-management/support/fedcm/${manifest_filename}`;
+  return {
+    identity: {
+      providers: [{
+        configURL: manifest_path,
+        clientId: '1',
+        nonce: '2',
+      }]
+    }
+  };
+}
+
+// Test wrapper which does FedCM-specific setup.
+export function fedcm_test(test_func, test_name) {
+  promise_test(async t => {
+    await set_fedcm_cookie();
+    await set_alt_fedcm_cookie();
+    await test_func(t);
+  }, test_name);
+}
+
+function select_manifest_impl(manifest_url) {
+  const url_query = (manifest_url === undefined)
+      ? '' : '?manifest_url=${manifest_url}';
+
+  return new Promise(resolve => {
+    const img = document.createElement('img');
+    img.src = 'support/fedcm/select_manifest_in_root_manifest.py?${url_query}';
+    img.addEventListener('error', resolve);
+    document.body.appendChild(img);
+  });
+}
+
+// Sets the manifest returned by the next fetch of /.well-known/web_identity
+// select_manifest() only affects the next fetch and not any subsequent fetches
+// (ex second next fetch).
+export function select_manifest(test, test_options) {
+  // Add cleanup in case that /.well-known/web_identity is not fetched at all.
+  test.add_cleanup(async () => {
+    await select_manifest_impl();
+  });
+  const manifest_url = test_options.identity.providers[0].configURL;
+  return select_manifest_impl(manifest_url);
+}