1 files changed, 28 insertions, 0 deletions
diff --git a/testing/web-platform/tests/payment-handler/register-and-activate-service-worker.js b/testing/web-platform/tests/payment-handler/register-and-activate-service-worker.js
new file mode 100644
index 0000000000..fb54c5c064
--- /dev/null
+++ b/testing/web-platform/tests/payment-handler/register-and-activate-service-worker.js
@@ -0,0 +1,28 @@
+async function registerAndActiveServiceWorker(script, scope, callback) {
+  const registration = await navigator.serviceWorker.register(script, {scope});
+  const serviceWorker =
+    registration.installing || registration.waiting || registration.active;
+  if (serviceWorker) {
+    waitForServiceWorkerActivation(scope, callback);
+    return;
+  }
+
+  registration.addEventListener('updatefound', event => {
+    waitForServiceWorkerActivation(scope, callback);
+  });
+}
+
+async function waitForServiceWorkerActivation(scope, callback) {
+  const registration = await navigator.serviceWorker.getRegistration(scope);
+  if (registration.active) {
+    callback(registration);
+    return;
+  }
+
+  const serviceWorker = registration.installing || registration.waiting;
+  serviceWorker.addEventListener('statechange', event => {
+    if (event.target.state == 'activated') {
+      callback(registration);
+    }
+  });
+}