1 files changed, 26 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-default-attribute.html b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-default-attribute.html
new file mode 100644
index 0000000000..3e8c547fc3
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-default-attribute.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<title>A track with the "default" attribute loads automatically</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<video>
+  <track kind="captions" src="resources/default-styles.vtt">
+  <track kind="captions" src="resources/metadata-area.vtt">
+  <track kind="captions" src="resources/webvtt-file.vtt" id="default" default>
+  <script>
+  async_test(function(t) {
+    var timer = null;
+    var tracks = document.querySelectorAll("track");
+    for (var track of tracks) {
+      track.onload = t.step_func(function() {
+        assert_equals(event.target.readyState, HTMLTrackElement.LOADED);
+        assert_equals(event.target.id, "default");
+        assert_true(event.target.default);
+        // End the test after a brief pause so we allow other tracks to load if they will.
+        if (timer)
+          clearTimeout(timer);
+        timer = t.step_timeout(t.step_func_done(), 200);
+      });
+    }
+  });
+  </script>
+</video>