    let el = fixture('dir');
    assertComputed(el, 'rgb(0, 128, 0)', 'background-color');
    assertComputed(el.shadowRoot.querySelector('#foo'), '10px');
    assertComputed(el.shadowRoot.querySelector('.thing'), '10px');
    let inner = el.shadowRoot.querySelector('x-inner-dir');
    assertComputed(inner.shadowRoot.querySelector('.special > div'), 'rgb(0, 128, 0)', 'color');
    assertComputed(inner.shadowRoot.querySelector('section'), '10px');
    assertComputed(inner.shadowRoot.querySelector('input'), '