third_party/web_platform_tests/html/editing/activation/click.html

<!doctype html>
<meta charset=utf-8>
<title>HTMLElement#click</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
test(function() {
  var element = document.createElement("div");
  var received = false;
  element.addEventListener("click", this.step_func(function(e) {
    received = true;
    assert_false(e.isTrusted, "Event should not be trusted")
  }));
  element.click();
  assert_true(received, "click event should have been dispatched synchronously");
})
</script>