<!doctype html>
<title>Scheduling API: TaskController.setPriority()</title>
<link rel="author" title="Nate Chapin" href="mailto:japhet@chromium.org">
<link rel="help" href="https://github.com/WICG/main-thread-scheduling">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
'use strict';

async_test(t => {
  let tc = new TaskController("user-visible");
  tc.signal.onprioritychange = t.step_func_done(() => {
    assert_equals(tc.signal.priority, "background");
  });
  tc.setPriority("background");
}, 'Test that TaskController.setPriority() triggers an onprioritychange event on the signal');

</script>