.appendChild(divOwner);
    divOwner.attachShadow({mode: 'open'}).appendChild(div);
    var bcr = divOwner.getBoundingClientRect();
    var x = bcr.left, y = bcr.top;
    var actual = deepTargetFind(x, y);
    assert.equal(actual, div);
  });
});

suite('Prevention', function() {
  var el;
  setup(function(done) {
    el = document.createElement('x-prevent');
    document.body.appendChild(el);
    afterNextRender(null, done);
  });
  teardown(function() {
    el.parentNode.removeChild(el);
    resetMouseCan