 var e = document.querySelector('x-select-attr');
  var ip$ = e.root.querySelectorAll('slot');
  var c = e.firstElementChild;
  flush();
  assert.equal(allInsertionPoints(c)[0], ip$[1], 'child not distributed based on host attribute');
  c.slot = 'foo';
  flush();
  assert.equal(allInsertionPoints(c)[0], ip$[0], 'child not distributed based on reflecting attribute');
  c.slot = '';
  flush();
  assert.equal(allInsertionPoints(c).length, 0, 'child not distributed based on reflecting attribute');
});

test('w