1 files changed, 32 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-cue-negative-timestamp-events.html b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-cue-negative-timestamp-events.html
new file mode 100644
index 0000000000..ebd7877f78
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/track-cue-negative-timestamp-events.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<title>Enter, Exit events for cues with negative timestamps</title>
+<script src="/common/media.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<video>
+  <script>
+  async_test(function(t) {
+    var video = document.querySelector("video");
+    var track = video.addTextTrack("subtitles");
+
+    // Add cue with negative startTime.
+    var cue = new VTTCue(-10, 1, "Sausage?");
+    track.addCue(cue);
+    assert_equals(track.cues.length, 1);
+    cue.onenter = t.step_func(function() {
+      cue.onexit = t.step_func_done();
+    });
+
+    // Add cue with negative startTime and negative endTime.
+    // This cue should never be active.
+    var missedCue = new VTTCue(-110, -3.4, "Pepperoni?");
+    track.addCue(missedCue);
+    assert_equals(track.cues.length, 2);
+    missedCue.onenter = t.unreached_func();
+    missedCue.onexit = t.unreached_func();
+
+    video.src = getVideoURI("/media/test");
+    video.play();
+  });
+  </script>
+</video>
+\ No newline at end of file