The test verifies functionality of protocol method CSS.isAppearanceBase.
".base" isAppearanceBase: true
".base option" isAppearanceBase: true
".base optgroup" isAppearanceBase: true
".base legend" isAppearanceBase: true
".auto" isAppearanceBase: false
".auto option" isAppearanceBase: false
".auto optgroup" isAppearanceBase: false
".auto legend" isAppearanceBase: false