1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/private-aggregation/resources/util.js b/testing/web-platform/tests/private-aggregation/resources/util.js
new file mode 100644
index 0000000000..24e156446f
--- /dev/null
+++ b/testing/web-platform/tests/private-aggregation/resources/util.js
@@ -0,0 +1,24 @@
+// Execute Private Aggregation functions in shared storage worklet given
+// `paa_data`, and expect that success/failure result is `expected_error`.
+async function VerifyContributeToHistogram(paa_data, expected_error) {
+  const ancestor_key = token();
+  let url0 = generateURL("/shared-storage/resources/frame0.html",
+                         [ancestor_key]);
+  let url1 = generateURL("/shared-storage/resources/frame1.html",
+                         [ancestor_key]);
+
+  await addModuleOnce("/private-aggregation/resources/shared-storage-helper-module.js");
+
+  let select_url_result = await sharedStorage.selectURL(
+    "contribute-to-histogram", [{url: url0}, {url: url1}],
+    {data: paa_data, keepAlive: true});
+
+  attachFencedFrame(select_url_result, 'opaque-ads');
+  const result = await nextValueFromServer(ancestor_key);
+
+  if (expected_error) {
+    assert_equals(result, "frame0_loaded");
+  } else {
+    assert_equals(result, "frame1_loaded");
+  }
+}