1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resources/test/harness.html b/testing/web-platform/tests/resources/test/harness.html
new file mode 100644
index 0000000000..5ee0f285e8
--- /dev/null
+++ b/testing/web-platform/tests/resources/test/harness.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+  </head>
+  <body>
+    <script>
+function runTest(url, id, done) {
+  var child;
+
+  function onMessage(event) {
+    if (!event.data || event.data.type !== 'complete') {
+      return;
+    }
+
+    window.removeEventListener('message', onMessage);
+    child.close();
+    done(event.data);
+  }
+  window.addEventListener('message', onMessage);
+
+  window.child = child = window.open(url, id);
+}
+    </script>
+  </body>
+</html>