Update web-platform-tests to revision abd18b3e018d25ed668d179c905b7869dca5e239

tests/wpt/web-platform-tests/paint-timing/idlharness.window.js

@@ -0,0 +1,28 @@
+// 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 timeout = new Promise((_, reject) => {
+      t.step_timeout(() => reject('Timed out waiting for paint event'), 3000);
+    });
+    return Promise.race([awaitPaint, timeout]);
+  },
+  'paint-timing interfaces.');