1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fenced-frame/resources/download-helper.js b/testing/web-platform/tests/fenced-frame/resources/download-helper.js
new file mode 100644
index 0000000000..011d5c867f
--- /dev/null
+++ b/testing/web-platform/tests/fenced-frame/resources/download-helper.js
@@ -0,0 +1,29 @@
+function StreamDownloadFinishDelay() {
+  return 1000;
+}
+
+function DownloadVerifyDelay() {
+  return 1000;
+}
+
+async function VerifyDownload(test_obj, token) {
+  const verifyToken = async (token) => {
+    const url = `resources/download-stash.py?verify-token&token=${token}`;
+    const response = await fetch(url);
+    if (!response.ok) {
+      throw new Error('An error happened in the server');
+    }
+    const message = await response.text();
+    return message === 'TOKEN_SET';
+  };
+
+  return new Promise((resolve) => {
+    test_obj.step_wait(
+        async () => {
+          const result = await verifyToken(token);
+          resolve(result);
+        },
+        'Check if the download has finished or not',
+        StreamDownloadFinishDelay() + DownloadVerifyDelay());
+  });
+}