1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webstorage/resources/partitioning-utils.js b/testing/web-platform/tests/webstorage/resources/partitioning-utils.js
new file mode 100644
index 0000000000..9d9e0b8ac5
--- /dev/null
+++ b/testing/web-platform/tests/webstorage/resources/partitioning-utils.js
@@ -0,0 +1,20 @@
+function getOrCreateID(key) {
+  if (!localStorage.getItem(key)) {
+    const newID = +new Date() + "-" + Math.random();
+    localStorage.setItem(key, newID);
+  }
+  return localStorage.getItem(key);
+}
+
+function addIframePromise(url) {
+  return new Promise(resolve => {
+    const iframe = document.createElement("iframe");
+    iframe.style.display = "none";
+    iframe.src = url;
+    iframe.addEventListener("load", (e) => {
+      resolve(iframe);
+    }, {once: true});
+
+    document.body.appendChild(iframe);
+  });
+}