1 files changed, 60 insertions, 0 deletions
diff --git a/testing/web-platform/tests/performance-timeline/resources/include-frames-helper.js b/testing/web-platform/tests/performance-timeline/resources/include-frames-helper.js
new file mode 100644
index 0000000000..a56489baaf
--- /dev/null
+++ b/testing/web-platform/tests/performance-timeline/resources/include-frames-helper.js
@@ -0,0 +1,60 @@
+const verifyEntries = (entries, filterOptions) => {
+  for (const filterOption of filterOptions) {
+    let countBeforeFiltering = entries.length;
+
+    // Using negate of the condition so that the next filtering is applied on less entries.
+    entries = entries.filter(
+      e => !(e.entryType == filterOption['entryType'] && e.name.includes(filterOption['name'])));
+
+    assert_equals(
+      countBeforeFiltering - entries.length, filterOption['expectedCount'], filterOption['failureMsg']);
+  }
+}
+
+const createFilterOption = (name, entryType, expectedCount, msgPrefix, description = '') => {
+  if (description) {
+    description = ' ' + description;
+  }
+
+  let failureMsg =
+    `${msgPrefix} should have ${expectedCount} ${entryType} entries for name ${name}` + description;
+
+  return {
+    name: name,
+    entryType: entryType,
+    expectedCount: expectedCount,
+    failureMsg: failureMsg
+  };
+}
+
+const loadChildFrame = (src) => {
+  return new Promise(resolve => {
+
+    const childFrame = document.createElement('iframe');
+
+    childFrame.addEventListener("load", resolve);
+
+    childFrame.src = src;
+
+    document.body.appendChild(childFrame);
+  });
+}
+
+const loadChildFrameAndGrandchildFrame = (src) => {
+  return new Promise(resolve => {
+
+    const crossOriginChildFrame = document.createElement('iframe');
+
+    // Wait for the child frame to send a message. The child frame would send a message
+    // when it loads its child frame.
+    window.addEventListener('message', e => {
+      if (e.data == 'Load completed') {
+        resolve();
+      }
+    });
+
+    crossOriginChildFrame.src = src;
+
+    document.body.appendChild(crossOriginChildFrame)
+  });
+}