1 files changed, 72 insertions, 0 deletions
diff --git a/testing/web-platform/tests/cookie-store/resources/helpers.js b/testing/web-platform/tests/cookie-store/resources/helpers.js
new file mode 100644
index 0000000000..8d5dddef65
--- /dev/null
+++ b/testing/web-platform/tests/cookie-store/resources/helpers.js
@@ -0,0 +1,72 @@
+/**
+ * Promise based helper function who's return promise will resolve
+ * once the iframe src has been loaded
+ * @param {string} url the url to set the iframe src
+ * @param {test} t a test object to add a cleanup function to
+ * @return {Promise} when resolved, will return the iframe
+ */
+self.createIframe = (url, t) => new Promise(resolve => {
+  const iframe = document.createElement('iframe');
+  iframe.addEventListener('load', () => {resolve(iframe);}, {once: true});
+  iframe.src = url;
+  document.documentElement.appendChild(iframe);
+  t.add_cleanup(() => iframe.remove());
+});
+
+/**
+ * @description - Function unregisters any service workers in this scope
+ *                and then creates a new registration. The function returns
+ *                a promise that resolves when the registered service worker
+ *                becomes activated. The resolved promise yields the
+ *                service worker registration
+ * @param {testCase} t - test case to add cleanup functions to
+ */
+self.createServiceWorker = async (t, sw_registration_name, scope_url) => {
+  let registration = await navigator.serviceWorker.getRegistration(scope_url);
+  if (registration)
+    await registration.unregister();
+
+  registration = await navigator.serviceWorker.register(sw_registration_name,
+      {scope_url});
+  t.add_cleanup(() => registration.unregister());
+
+  return new Promise(resolve => {
+    const serviceWorker = registration.installing || registration.active ||
+        registration.waiting;
+    serviceWorker.addEventListener('statechange', event => {
+      if (event.target.state === 'activated') {
+        resolve(serviceWorker);
+      }
+    });
+  })
+}
+
+/**
+ * Function that will return a promise that resolves when a message event
+ * is fired. Returns a promise that resolves to the message that was received
+ */
+self.waitForMessage = () => new Promise(resolve => {
+  window.addEventListener('message', event => {
+    resolve(event.data);
+  }, {once: true});
+});
+
+/**
+ * Sends a message via MessageChannel and waits for the response
+ * @param {*} message
+ * @returns {Promise} resolves with the response payload
+ */
+self.sendMessageOverChannel = (message, target) => {
+  return new Promise(function(resolve, reject) {
+    const messageChannel = new MessageChannel();
+    messageChannel.port1.onmessage = event => {
+      if (event.data.error) {
+        reject(event.data.error);
+      } else {
+        resolve(event.data);
+      }
+    };
+
+    target.postMessage(message, [messageChannel.port2]);
+  })
+};