1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/paint-timing/idlharness.window.js b/testing/web-platform/tests/paint-timing/idlharness.window.js
new file mode 100644
index 0000000000..049f0f18f1
--- /dev/null
+++ b/testing/web-platform/tests/paint-timing/idlharness.window.js
@@ -0,0 +1,31 @@
+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+
+'use strict';
+
+// https://w3c.github.io/paint-timing/
+
+idl_test(
+  ['paint-timing'],
+  ['performance-timeline'],
+  (idl_array, t) => {
+    idl_array.add_objects({
+      PerformancePaintTiming: ['paintTiming'],
+    });
+
+    const awaitPaint = new Promise(resolve => {
+      let observer = new PerformanceObserver(list => {
+        self.paintTiming = list.getEntries()[0];
+        resolve();
+      });
+      observer.observe({ entryTypes: ['paint'] });
+      const div = document.createElement('div');
+      div.innerHTML = 'Hello World';
+      document.body.appendChild(div);
+    });
+    const timeout = new Promise((_, reject) => {
+      t.step_timeout(() => reject('Timed out waiting for paint event'), 3000);
+    });
+    return Promise.race([awaitPaint, timeout]);
+  }
+);